Cisco MC3810 - Cisco IOS Release 12.2 XB

These release notes for the Cisco MC3810 describe the enhancements provided in Cisco IOS Release 12.2(2)XB15. These release notes are updated as needed.

Introduction

The Cisco MC3810 multiservice access concentrator is fully supported by Cisco IOS software for multiprotocol routing, bridging, and Systems Network Architecture (SNA). As part of an enterprise backbone or as a CPE device to serve provider-managed network services, the Cisco MC3810 reduces operating costs and complexity, and increases network throughput and performance.

The Cisco MC3810 provides a complete file system for software images, message files, and reports. The standard Flash memory size is 8 MB. A 16-MB upgrade option is available. The 16-MB version can hold two code images simultaneously for fail-safe upgrades.

Management and configuration of the Cisco MC3810 should be familiar to the Cisco IOS user and compatible with existing management systems. As such, it provides a superset of the Cisco command-line interface (CLI). The Cisco MC3810 can be managed by standard Cisco management platforms and facilities such as CiscoView and the native remote login facilities provided by Telnet and rlogin. Three types of configuration interfaces are provided as follows:

The HTTP-based interface allows configuration from any web browser such as Netscape Navigator or Microsoft Explorer. The Simple Network Management Protocol (SNMP) MIB allows management of the Cisco MC3810 from SNMP managers (for example, HP OpenView).

System Requirements

This section describes the system requirements for Cisco IOS Release 12.2 XB and includes the following sections:

Memory Recommendations

Supported Hardware

Cisco IOS Release 12.2 T supports the Cisco MC3810 multiservice access concentrator. The Cisco MC3810 base chassis is a semifixed configuration router that can be customized for a specific application at the factory or in the field by a qualified technician. The base chassis includes the following components:

Cisco MC3810 series concentrators are supplied in various standard hardware configurations. These concentrators are equipped with different sets of functional modules to provide specific functional capability. Many configurations are possible, but they are all variations of the basic categories described in Table 2. Supported hardware is shown in Table 3. The chassis opening for any mounting area that is not equipped with a functional module is closed off with a removable cover plate.

For additional information about supported hardware for this platform and release, please refer to the Hardware/Software Compatibility Matrix in the Cisco Software Advisor at the following location:

Determining the Software Version

To determine the version of Cisco IOS software running on your Cisco MC3810, log in to the Cisco MC3810 and enter the show version EXEC command:

Upgrading to a New Software Release

For general information about upgrading to a new software release, refer to Software Installation and Upgrade Procedures located at the following URL:

Feature Set Tables

The Cisco IOS software is packaged in feature sets consisting of software images—depending on the platform. Each feature set contains a specific set of Cisco IOS features.

Cisco IOS Release 12.2(2)XB15 supports the same feature sets as Cisco IOS Release 12.2(4) T, but Cisco IOS Release 12.2(2)XB15 can include new features supported by the Cisco MC3810.

Table 4 and Table 5 list the features and feature sets supported by the Cisco MC3810 used the following conventions:

New and Changed Information

The following sections list the new hardware and software features supported by the Cisco MC3810 for Cisco IOS Release 12.2(2) XB14.

New Hardware and Software Features in Cisco IOS Release 12.2(2)XB14 to Cisco IOS Release 12.2(2)XB15

No new hardware and software features are supported by the Cisco MC3810 for Cisco IOS Release 12.2(2)XB14 to Cisco IOS Release 12.2(2)XB15.

New Hardware and Software Features in Cisco IOS Release 12.2(2)XB9 to Cisco IOS Release 12.2(2)XB13

Cisco IOS Release 12.2(2)XB9 to Cisco IOS Release 12.2(2)XB13 do not support the Cisco MC3810.

New Hardware and Software Features from Cisco IOS Release 12.2(2)XB1 to Cisco IOS Release 12.2(2)XB8

No new hardware and software features are supported by the Cisco MC3810 from Cisco IOS Release 12.2(2)XB1 to Cisco IOS Release 12.2(2)XB8.

New Software Features in Cisco IOS Release 12.2(2)XB

The following new software features are supported by the Cisco MC3810 for Cisco IOS Release 12.2(2)XB:

MGCP Based Fax (T.38) and DTMF Relay

The MGCP Based Fax (T.38) and DTMF (IETF) Relay feature adds support for fax relay and DTMF relay with MGCP. The fax relay component conforms to ITU-T T.38, Procedures for real-time Group 3 facsimile communication over IP networks, which determines procedures for real-time facsimile communication in various gateway control protocol (XGCP) applications. The DTMF relay component conforms to RFC 2833, RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals, developed by the Internet Engineering Task Force (IETF) Audio/Video Transport (AVT) working group. Per RFC 2833, DTMF is relayed using Named Telephony Events (NTEs) in Real-Time Transport Protocol (RTP) packets.

This feature provides two modes of implementation for each component: gateway (GW)-controlled mode and call agent (CA)-controlled mode. In GW-controlled mode, GWs negotiate DTMF and fax relay transmission by exchanging capability information in Session Description Protocol (SDP) messages. That transmission is transparent to the CA. GW-controlled mode allows use of the MGCP Based Fax (T.38) and DTMF (IETF) Relay feature without upgrading the CA software to support the feature.

In CA-controlled mode, CAs use MGCP messaging to instruct GWs to process fax and DTMF traffic. For MGCP T.38 Fax Relay, the CAs can also instruct GWs to revert to GW-controlled mode if the CA is unable to handle the fax control messaging traffic; for example, in overloaded or congested networks.

MGCP VoIP Call Admission Control

MGCP CAC determines if calls can be accepted on the IP network based on available network resources. Prior to this release, MGCP VoIP calls were established regardless of the available resources on the gateway or network. The gateway had no mechanism for gracefully refusing calls if resources were not available to process the call. New calls would fail with unexpected behavior and in-progress calls would experience quality-related problems.

Unspecified Bit Rate Plus (uBR+) and ATM Enhancements

These enhancements permit the over subscription of ATM trunks for uBR+ permanent virtual circuits (PVCs).

uBR+ supports a zero committed information rate (CIR) with infinite burst capabilities. It allows any available network bandwidth to be continuously usable by any data application. For this feature, all data traffic in the network will use uBR+. The zero CIR with infinite burst feature is exclusive to data traffic and implemented for AAL5.

Without the uBR+ and ATM enhancement feature, a file transfer from one virtual circuit (VC) uses the entire trunk bandwidth when no other VCs (data or voice) are active. When other VCs are active with a fixed amount of bandwidth, the one VC's file transfer will appropriate all of the remaining bandwidth that the other VCs are not using.

Since uBR allows for a continuous burst, bandwidth could be conserved by assigning a uBR Class of Service (CoS) to the VC. However, uBR has a variable bit rate (VBR) that constrains the burst period to a maximum burst size (MBS), rather than allowing a continuous burst. The uBR+ and ATM enhancements feature does not have an MBS constraint.

MIBs

Current MIBs

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:

To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:

Deprecated and Replacement MIBs

Old Cisco MIBs will be replaced in a future release. Currently, OLD-CISCO-* MIBs are being converted into more scalable MIBs without affecting existing Cisco IOS products or network management system (NMS) applications. You can update from deprecated MIBs to the replacement MIBs as shown in Table 7.

Important Notes

The following sections contain important notes about Cisco IOS Release 12.2 XB that can apply to the Cisco MC3810.

Changes to output attenuation Command

In Cisco IOS Release 12.2(2), the range of the output attenuation command for voice ports has changed from 0-14 to -6-14.

Using the Cisco MC3810 with QSIG or BRI

Using the Cisco MC3810 with the PSTN

This section includes important notes regarding use of the Cisco MC3810 with the Public Switched Telephone Network (PSTN):

Field Notices and Bulletins

For general information about the types of documents listed in this section, refer to the following document:

Caveats for Cisco IOS Release 12.2 XB

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious. Severity 3 caveats are moderate caveats, and only select severity 3 caveats are included in the caveats document.

This section contains only open and resolved caveats for the current Cisco IOS maintenance release.

All caveats in Cisco IOS Release 12.2 and Cisco IOS Release 12.2 T are also in Cisco IOS Release 12.2(2)XB15.

For information on caveats in Cisco IOS Release 12.2(2) T, see Caveats for Cisco IOS Release 12.2(2) T , which lists severity 1 and 2 caveats and select severity 3 caveats and is located on Cisco.com and the Documentation CD-ROM.

Open Caveats—Cisco IOS Release 12.2(2)XB15

There are no open caveats specific to Cisco IOS Release 12.2(2)XB15 that require documentation in the release notes.

Resolved Caveats—Cisco IOS Release 12.2(2)XB15

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB15. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

Open Caveats—Cisco IOS Release 12.2(2)XB14

There are no open caveats specific to Cisco IOS Release 12.2(2)XB14 that require documentation in the release notes.

Resolved Caveats—Cisco IOS Release 12.2(2)XB14

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB14. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

Table 9 Resolved Caveats for Cisco IOS Release 12.2(2)XB8

DDTS ID Number	Description
CSCdx76632	as5300 crashed in MultiBitDecode Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCea19885	Bus error at address 0xD0D0D0B, Process CCH323_CT Symptoms: A Cisco router that has a voice feature such as H.323 enabled may reload because of a bus error at address 0xD0D0D0B. Conditions: This symptom is observed on a Cisco 3700 series but may also occur on other routers. Workaround: There is no workaround.
CSCea27536	Router crash when H323v3/v4 pkts pass through NAT router Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml . NAT router (which is H323v2 stack aware) crashes when H323v3/v4 pkt is processed as "ip nat service h323all" is turned on. Workaround: Turn off "ip nat service h323all" or move to 12.3T image (which has NAT-H323v3/v4) support
CSCea32240	H323 crashes in strncpy when receiving invalid setup packet Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCea33065	H323 Spurious memory access in h450ProcRcvdApdus Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCea36231	Router hangs when receive in invalid h225 setup Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCea46342	h.323 crashes in ACFnonStandardInfo DEC_ERR=13 Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCea51030	h323: proxy crashes when malformed h225 setup message received Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCea51076	h323: proxy crashes when processing invalid h225 setup messafe Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCea54851	h323 proxy: crash at pxy_proc_recv_SETUP when invalid h225 setup rx Cisco products running IOS contain vulnerabilities in the processing of H.323 messages, which are typically used in packetized voice or multimedia applications. Features such as NAT and IOS Firewall must inspect H.323 messages and may be vulnerable as well. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities. Support for the H.323 protocol was introduced in Cisco IOS Software Release 11.3T, and all later Cisco IOS releases are affected if configured for various types of Voice/Multimedia Application support. The vulnerabilities can be exploited repeatedly to produce a denial of service (DoS). There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20040113-h323.shtml .
CSCeb78836	h323: software forced crash if bad packet received and debug opened Symptoms: Cisco IOS software may cause a Cisco router to reload unexpectedly when the router receives a malformed H.225 setup message. Conditions: This symptom is observed on a Cisco 1700 series that runs Cisco IOS Release 12.2(13c). The symptom occurs when the following debug privileged EXEC commands are enabled: debug h225 asn1 debug h225 events debug h225 q931 Workaround: There is no workaround.

No Caveats—Cisco IOS Release 12.2(2)XB9 to Cisco IOS Release 12.2(2)XB13

Cisco IOS Release 12.2(2)XB13 does not exist, so no caveats are documented. Cisco IOS Release 12.2(2)XB9 through Cisco IOS Release 12.2(2)XB12 do not support the Cisco MC3810. Cisco IOS Release 12.2(2)XB9 is not distributed for widespread availability.

Open Caveats—Cisco IOS Release 12.2(2)XB8

This section documents possible unexpected behavior by Cisco IOS Release 12.2(2)XB8 and describes only severity 1 and 2 caveats and select severity 3 caveats.

Resolved Caveats—Cisco IOS Release 12.2(2)XB8

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB8. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

Open Caveats—Cisco IOS Release 12.2(2)XB7

This section documents possible unexpected behavior by Cisco IOS Release 12.2(2)XB7 and describes only severity 1 and 2 caveats and select severity 3 caveats.

Resolved Caveats—Cisco IOS Release 12.2(2)XB7

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB7. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

Table 13 Resolved Caveats for Cisco IOS Release 12.2(2)XB7

DDTS ID Number	Description
CSCdk31736	PPP authentication requests with no username are not forwarded to the TACACS+/RADIUS server. This may prevent you from authenticating people by Caller ID.
CSCdv21918	A router may reload if netflow-data is exported to a multicast address. Workaround: Do not configure a multicast address; use a unicast address instead.
CSCdv27734	New PPP configuration commands are provided which provide control over the negotiation and application of the LCP configuration options for HDLC Address and Control Field Compression (ACFC) and PPP Protocol Field Compression (PFC).
CSCdw00055	The non-variable-length dial-plan matching character \Q$' permits a user to force a match on a destination-pattern consisting of a fixed number of digits. For example, use the following configuration: ! dial-peer voice 1 voip destination-pattern 01152....$ session target ipv4:IP_ADDR_RTR1 ip precedence 5 ! dial-peer voice 2 voip destination-pattern 01152...... session target ipv4:IP_ADDR_RTR2 ip precedence 5 ! The user in this situation has calls to phone numbers which share the same first set of prefix digits but whose complete set of digits are different in number. In the example above, calls to RTR1 have nine digits starting with \Q01152' while calls to RTR2 have 11 digits starting with \Q01152'. To eliminate the ambiguity as to which dial-peer to match, the \Q$' is used so that a call to RTR2 will not match on dial-peer 1. This configuration works in Cisco IOS Release 12.1 images which support the \Q$' dial-peer matching character and Cisco IOS Release 12.2(1a). Starting in Cisco IOS Release 12.2(1.1) and in Cisco IOS Release 12.2(2)T, the dial-plan no longer permits a destination-pattern terminated with the \Q$' character to be matched at all, and hence no calls using that dial-peer will complete. Workaround: Configure the destination-patterns which end in \Q$' to end in \QT?$': ! dial-peer voice 1 voip destination-pattern 01152....T?$ session target ipv4:IP_ADDR_RTR1 ip precedence 5 ! dial-peer voice 2 voip destination-pattern 01152...... session target ipv4:IP_ADDR_RTR2 ip precedence 5 !
CSCdw93050	The problem is transparent to the customer and is involved with the IOS MLP/PPP architecture.
CSCdx15859	Calltracker, show call calltracker active, and ... history commands display extraneous comma after authentication time.
CSCdx33166	During LSDOCallback, the sessions on the server side go down due to which callback already exists debugs can be seen in the logs inhibiting callback from occurring. Workaround: There is no workaround.
CSCdx41454	Symptom: Router applies the ip tacacs source-interface configuration only to the first tacacs server in the server list and fails to use the IP address for other configured servers. Conditions: When the primary TACACS server is not available, the router will attempt for the next TACACS server in the list. While connecting to the secondary TACACS server, the router ignores the ip tacacs source-interface configuration and it uses the IP address of the outgoing interface. The router is expected to use the IP address configured through ip tacacs source-interface command as source address, while connecting to the TACACS server, including the secondaries. Workaround: A workaround is possible using NAT. The user can apply NAT for the TACACS packets by the following configuration. interface outbound interface to the tacacs server ip nat outside ! ip nat inside source list 102 interface Loopback0 overload access-list 102 permit tcp any any eq tacacs
CSCdx81130	Microsoft Callback negotiation may fail with particular clients. This is due to a minor difference between Cisco's implementation of the Microsoft Callback server and the original implementation by Microsoft in a detail that is not clearly specified in the draft RFC. While this particular problem does not seem to impact Microsoft Windows clients requesting for callback, it has been observed with a 3Com OfficeConnect LAN modem that failed to negotiate MS callback with a Cisco NAS. Workaround: There is no workaround.
CSCdx93324	The H.323 gateway may crash accessing invalid memory location. Workaround: There is no work around.
CSCdy01787	When MTU configuration is manually overridden the EAP proxy client may not be able to appropriately size frames for the client's MRU. Workaround: Do not adjust the MTU on the router.
CSCdy05296	The port information provided on a Cisco AS5350 universal gateway, Cisco AS5400 universal gateway, or Cisco AS5850 universal gateway on modems within Radius attribute 5 using either nas-port format a or b for async calls provide the true port information (as in slot/port) and not the TTY line number of the modem which previous generation dial platforms provided. This is causing problems for service providers using a variety of Cisco dial platforms as they are inconsistent in the information being relayed on the various platforms Cisco sells. Workaround: There is no workaround.
CSCuk36415	Symptom: RTP packets queued from the fast switching path will be sent uncompressed. Workaround: There is no workaround.

Open Caveats—Cisco IOS Release 12.2(2)XB6

This section documents possible unexpected behavior by Cisco IOS Release 12.2(2)XB6 and describes only severity 1 and 2 caveats and select severity 3 caveats.

Resolved Caveats—Cisco IOS Release 12.2(2)XB6

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB6. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

Open Caveats—Cisco IOS Release 12.2(2)XB5

This section documents possible unexpected behavior by Cisco IOS Release 12.2(2)XB5 and describes only severity 1 and 2 caveats and select severity 3 caveats.

Resolved Caveats—Cisco IOS Release 12.2(2)XB5

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB5. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

Table 17 Resolved Caveats for Cisco IOS Release 12.2(2)XB5

DDTS ID Number	Description
CSCdu14530	If the IP address is removed from a the PPP interface of a Cisco 7500, running Cisco IOS Release 12.1E IOS, and then the IP address is added, this change is not reflected immediately in CEF. This results in 50% packet loss until the background CEF process updates the adjacency. The workarounds are: shut / no shut the PPP interface. disable CEF (not an option as the 7500 is a PE router).
CSCdv38563	Client code does not add attributes 90 & 91 for the LAC Network access server (NAS) may fail to include attributes 90 and 91 when a router hostname is used as the tunnel ID and when the tunnel ID is not included in the user profile. There is no workaround.
CSCdv54127	Missing Acct-Output-Packets & Acct-Input-Packets in STOP rec The Acct-Output-Packets and Acct-Input-Packets attributes are missing in the STOP record while testing network accounting, even though they are seen in the debug output.
CSCdv66747	Traceback at l2tp_fixup_cached_header Tracebacks occur with vpdn in Cisco IOS Release 12.2(02)XB, Cisco IOS Release 12.2(03)PI, & Cisco IOS Release 12.2.T.
CSCdv71454	l2tp_process_unsent_queue may cause CPUHOG In Cisco IOS Release 12.2T, "L2TP mgmt daemon" may cause CPUHOG if there are lots of packets in unsentQ.
CSCdw00924	MLP bundle transmit may jam when link departs bundle On a PPP multilink bundle that has multiple links, if one of the links departs from the bundle while data is enqueued for output at the bundle interface, the output mechanism on the bundle may stall, halting any further output from that bundle. The output queue on the bundle becomes full, causing packets that are forwarded to that bundle to be dropped and the affected bundle to stop transmitting packets. Workaround: There is no workaround.
CSCdw06038	RPM:no profile found for call-type digital Symptom: With Resource Pooling and Resource Pooling AAA accounting configured, a customer profile may not be found for a particular DNIS group. Conditions: The gateway may have a problem with incoming calls finding the customer profile depending on the order, size and value of the dnis entered; results may vary depending on whether the DNIS is manually entered or whether the wavl is set up from reload via the start-up config. Workaround: There is no workaround.
CSCdw39083	Calls being disconnected by gateway with cause code 47(resource una) When running test calls in a ThunderVoice environment a small percentage of the calls are being rejected by the originating gateway with cause code 47 (resource unavailable, unspecified). Workaround: There is no workaround.
CSCdw45584	Cisco-AV pair lcp:send-secret=cisco not supported in XB VPDN authorization fails when "lcp:send-secret=xxxx" is sent in the access accept packet from radius.
CSCdw62064	IKE Keepalives being dropped with MLPPP fragmentation On 7200 running Cisco IOS Release 12.2.6, it is seen that with T1 links combined in a Multilink PPP bundle, and MLPPP fragmentation enabled; ISAKMP keepalives are not being received by the box, even though the remote peer is sending out the keepalive messages. As a result each end thinks its peer is dead and deletes the IKE & IPSEC SAs. They then re-negotiate IKE and IPSEC and create new SAs. As a result, IKE and IPSEC are re-negotiated at each IKE keepalive interval and there is some traffic drop during this re-negotiation phase. Workaround: Disable hardware crypto acceleration. With software crypto, this problem is not seen. Disable MLPPP fragmentation. Without fragmentation, the IKE keepalives are received by the peers (even with hardware crypto)
CSCdw68757	Caller hear second dial-tones CHOM noise from Nortel PBX. Caller on original GW of CAS hear the second dial-tone CHOM from the far end router which connected to Nortel PBX. This is only for CAS case. Workaround: There is no workaround.
CSCdw80687	ip tcp compression-header passive is always compressing ppp traffic Symptom: Packets are process switched on an interface with fast switching configured. This can result in high CPU usage. Conditions: Header-compression must be configured, but only on one side. For example, in a dial-in situation, where header-compression is configured on the central switch, but not on the box that is dialling in. Also, the interface must not support FAST switched header-compression, e.g. most dial-in interfaces are currently not supported. Workaround: Remove header-compression from the configuration. Note If header-compression is configured on both sides of a link, and the interface does not support fast-switched header-compression, then process switching is normal and required for successful operation of the header-compression feature.
CSCdw85178	OJ:VSA incorrectly billing ip hops Genuity is not able to bill multiple customers off of one proxy. Workaround: There is no workaround.
CSCdw89455	PPP authen failure with fourth method All PPP Auth methods will not work with MSCHAP V2.
CSCdw91279	L2TP ZLB ACK not processed correctly (regress CSCdk57040) A Cisco router that is running Cisco IOS Release 12.2(5.7)T or a later release and that is acting as a Layer 2 Tunneling Protocol (L2TP) access concentrator (LAC) or L2TP network server (LNS) may fail to process valid L2TP Zero-Length Body Acknowledgement (ZLB ACK) packets. This behavior may cause sessions and tunnels to drop. Workaround: There is no workaround.
CSCdx02038	FXS voice port in IAD2420 does not give dialtone, no debugs seen The customer has some 6 or 7 of his customers not able to place any call in the first port in IAD. The IAD does not even give a Dial tone. All we get is Dead Air. When we try doing debug we do not see ANY information in the Debugs. Workaround: The only way to fix it is by reloading the box. It will fix the problem for sometime, but will surface back again.
CSCdx02102	Memory corruption with MPPE when MTU exceeds 8K A Cisco router may experience memory corruption when configured with software encryption (MPPE) if the MTU size is greater than 8K (and if there are actually packets of length greater than 8K). Workaround: Configure MTU less than 8K when doing software encryption (MPPE).
CSCdx05704	MSCB won't propose the skip CB option to peer with dialer profiles When a user dials in, requests MSCB and is bound to a dialer profile, after authentication (problem won't happen if the profile is bound before PPP starts) then IOS does not propose the option to skip callback during CBCP even if we are configured for it (ppp callback accept and user has empty callback dial string). If the user opts to skip the callback anyway, we will drop the call because we did not propose that option, which is correct behavior but has only been enforced since CSCdu55093, which is why this bug has been relatively hidden up until recently.
CSCdx09410	Local RPM CLI commands for VPDN profiles stripped out at bootup Symptom: A CLI command in startup config is not recognized by Cisco AS5800 when it boots up. Workaround: Manually enter that in the config after bootup.
CSCdx11607	Enable pre-auth breaks digital calls AAA Pre-auth causes digital calls to break, because resource allocation fails. Workaround: There is no workaround.
CSCdx22886	SGBP functionality broken SGBP forwarding does not work if VPDN is disabled. A temporary workaround for this problem is to enable VPDN (issue the command 'vpdn enable') and then disable it immediately (issue 'no vpdn enable') on all the SGBP stack group members. This allocates the resources required to do SGBP, and at the same time does not require VPDN to be kept enabled.
CSCdx26331	SIP: Connect Timestamp missing in CallHistory when ACK is missing Symptom: The Call History information generated by the SIP call leg does not have a valid (non-zero) duration while the POTS Call History for the same call has a non-zero duration. Condition: This will happen when the ACK fails to reach the TGW following an answer (200 OK response). Workaround: There is no workaround.
CSCdx33510	Occasionally IAD hold DTMF digits until user hang up. Symptom: Offhook is reported to the call agent, however any digits dialed for the endpoint are not reported to the call agent. Consequently, the endpoint does not allow a call to originate once it is in this state. Conditions: The endpoint gets into this condition when a request for digits (A) is sent by the call agent, later followed by a request for digits (D), however the call agent has yet to provide the endpoint a digit map. The call flow described below in "Further Problem Description" provides an example. Note that SGCP 1.5, MGCP 0.1, and MGCP 1.0 are affected. Further Problem Description: RQNT 3956664 endpoint protocol-version X: 3FFF R: hd, [0-9#ABCD](A) 200 3956664 OK NTFY 18956 endpoint protocol-version X: 3FFF O: hd 200 18956 OK RQNT 3956662 endpoint protocol-version X: 1CFF03003956 R: hu, [0-9#T](D) 200 3956662 OK Note This should be a 519 error result since a digit map did not exist for the endpoint. The call agent should then follow up and provide the endpoint with a digit map. Workaround: There is no workaround.
CSCdx40546	No ANI Information for T37 offramp fax For T.37 offramp fax, the ANI information is currently available only from the message envelope of the E-mail. But in the case that the mail has to be bounced (such as invalid fax machine number), the mail cannot be bounced back to the correct account. The call cannot be billed in this case.
CSCin03065	New L2TP Tunnel created with existing Tunnel to same LNS. When an attempt is made to create an additional session that has similar tunnel parameters that are defined by a RADIUS profile (for the same domain, the same user, or a different user), instead of creating a session under the existing tunnel, a new tunnel and a session are created. This condition is observed in Cisco IOS Release 12.2(7.4)T and occurs if the tunnel parameters are defined by RADIUS without either of the following definitions: Cisco-Avpair vpdn:tunnel-id = "xyz" Tunnel-Client-Auth-ID = "xyz" Workaround: Define one of the following definitions under a RADIUS profile when tunnel parameters are defined: Cisco-Avpair vpdn:tunnel-id = "xyz" Tunnel-Client-Auth-ID = "xyz"
CSCin03065	New L2TP Tunnel created with existing Tunnel to same LNS. When an attempt is made to create an additional session that has similar tunnel parameters that are defined by a RADIUS profile (for the same domain, the same user, or a different user), instead of creating a session under the existing tunnel, a new tunnel and a session are created. This condition is observed in Cisco IOS Release 12.2(7.4)T and occurs if the tunnel parameters are defined by RADIUS without either of the following definitions: Cisco-Avpair vpdn:tunnel-id = "xyz" Tunnel-Client-Auth-ID = "xyz" Workaround: Define one of the following definitions under a RADIUS profile when tunnel parameters are defined: Cisco-Avpair vpdn:tunnel-id = "xyz" Tunnel-Client-Auth-ID = "xyz"
CSCin06313	RM/AUTH: Process (22) failed to register to VPDN message while boot Cisco AS5850 pops out the following error message after boot up: 00:00:38: RM/AUTH: Process (22) failed to register to VPDN This message is seen with c5850-p9-mz-v122_2_xb_throttle_flo_t.0.4.0 image. Workaround: There is no workaround.
CSCuk32311	PPP: Only allow punt adjacencies to be installed until IPCP is open When Cisco Express Forwarding (CEF) is enabled, adjacencies are erroneously added for sessions that have been forwarded using a tunnelling protocol such as L2TP or PPPoE. Adjacencies should only be added for sessions that terminate on the router, and only after the IP Control Protocol (IPCP) has been negotiated. Workaround: There is no workaround.
CSCuk33327	RADIUS fail during EAP should trigger LCP restart After RADIUS failover, during EAP, the NAS would try to failover to a new RADIUS server. However, this is forbidden midway through authentication. As such, the NAS was required to restart the authentication process from scratch and allow the user another attempt to authenticate.

Open Caveats—Cisco IOS Release 12.2(2)XB4

This section documents possible unexpected behavior by Cisco IOS Release 12.2(2)X4B and describes only severity 1 and 2 caveats and select severity 3 caveats.

Resolved Caveats—Cisco IOS Release 12.2(2)XB4

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB4. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

Table 19 Resolved Caveats for Cisco IOS Release 12.2(2)XB4

DDTS ID Number	Description
CSCdr47232	Set operation is not implemented for a few dsx1 specific MIB objects like dsx1LineType, dsx1LineCoding etc.
CSCdr85436	Description: This command can be used in the global config mode, to enable sending radius attribute 32 (NAS-Identifier) in the accounting request. By default fully qualified domain name (FQDN) is sent in the attribute when the format is not specified. Syntax: [no] radius-server attribute 32 include-in-accounting-req {format <A string that may have %i, %h or %d.>} %i = IP address %h = Hostname %d = Domain name FQDN is sent by default if the format string is not configured. Examples: manly(config)#radius-server attribute 32 include-in-accounting-req format cisco %h.%d %i Following string will be sent in NAS-identifier as a part of accounting record. cisco manly.nlab.cisco.com 10.0.1.67
CSCdr93141	The user-maxlinks feature (see http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t5/maxlink.htm) does not work when configured on a VPDN LNS/HGW.
CSCdt63321	An IP route entry may fail to be updated properly when one-step and two-step translations are performed using the Serial Line Internet Protocol (SLIP). Workaround: There is no workaround.
CSCdu13706	IAD2420 and MC3810 will respond to MGCP AUEP message with 501 error message.
CSCdu19432	Attribute Acct-Session-Time [46] in Exec Acct. Stop Record is zero. Workaround: There is no workaround.
CSCdu35843	IP access lists are not installed when they are received from a RADIUS server. This condition is observed in Cisco IOS Release 12.2(1.2)PI.
CSCdu36862	A system accounting record needs to be sent when a radius server is added or deleted. This will be committed in latest Cisco IOS Release 12.2 branch and will also be committed in latest 6400 branch.
CSCdu40615	Some clients may fail to successfully complete IP Control Protocol (IPCP) negotiations when thousands of PPP sessions are simultaneously reestablished, as is the case when an interface with many links is recycled. All Layer 2 Tunneling Protocol (L2TP) sessions are established, but some client virtual access interfaces may not get a negotiated IP address. The missing IP address results in lost IP connectivity on that link. Workaround: There is no workaround.
CSCdu43689	Currently, the Per-User Request buffer is limited to 600 bytes. If the user profile has more than 600 bytes of configuration information, the Per-User attributes are not processed, which results in rejecting the user. Workaround: There is no workaround.
CSCdu64847	CISCO-AAA-SESSION-MIB user disconnect feature doesn't work for vpdn connections on the LNS.
CSCdu67010	Some TACACS+ attribute string names and attribute string values have changed slightly, e.g. "nas_rx_speed" is now "nas-rx-speed". This may cause problems for backend accounting applications trying to process records or authorization failures.
CSCdu74728	No accounting records are generated for outbound Telnet sessions after connection accounting is configured. Workaround: There is no workaround.
CSCdu82254	Cause: the default voice port codec byte size is set to 160 bytes. For MC3810/IAD2420, default voice port codec type is set to g729ar8, therefore the default codec byte size of 160 can not be used on MC3810/IAD2420. It is OK on other platforms, since their default voice port codec type is g711ulaw. Symptom: Bad voice quality is heard for internal voice port to voice port call with default codec type (g729ar8) on MC3810/IAD2420 without local-bypass after boot up. Workaround: right after MC3810/IAD2420 boot up, configure codec g729ar8 on the all voice ports, which in effect overwrites the default codec byte size with 20.
CSCdu84692	When using Cisco IOS Release 12.2(2.x) and Cisco IOS Release 12.2(3.x)PI code, local VPDN authorization does not failover to the next method in the method list if the domain/dnis profile is not found. The workaround is to only use RADIUS/TACACS+ vpdn authorization.
CSCdu86243	The RADIUS attributes Ascend-Client-Primary-DNS and Ascend-Client-Secondary-DNS do not work in Cisco IOS Release 12.2(3.4)T or later. The Cisco-AVPair ip:dns-server also does not work. Workaround: There is no workaround.
CSCdv01412	Conditions under which the problem occurs: FXS FastEthernet FXS(LoopBack) [Pots A]--------[1750_r1]--------\|-------[1750_r2] dial-peer voice 1 voip dial-peer voice 2 voip destination-pattern 300 destination-pattern 300 session target ipv4:100.0.0.2 session target loopback:rtp When A calls 300, no voice loopback occurs. Symptoms of the problem: silent. Workaround: There is no workaround.
CSCdv01555	Spurious access may been seen when TACACS+ is enabled in Cisco IOS Release 12.2(3.4)T or later. Workaround: There is no workaround.
CSCdv02732	A router that is running Cisco IOS Release 12.2(3.4) T or a later release may reload unexpectedly after the Terminal Access Controller Access Control System (TACACS+) command accounting is enabled and a config net privileged EXEC command is executed. There is no workaround.
CSCdv03076	A Cisco router running Cisco IOS Release 12.2(3.4)T or later will not process Ascend RADIUS server attributes even if "non-standard" is part of the radius-server host configuration statement if the radius-server is referenced through a aaa server group. The workaround is not to use a server-group and use group radius instead.
CSCdv03689	If a Point to Point Protocol (PPP) Multilink bundle interface goes down while data is flowing through it, a Cisco router may reload. Workaround: There is no workaround.
CSCdv04999	The username, accounting record type, and service attributes in the command accounting record is do not have appropriate value. Workaround: There is no workaround.
CSCdv13634	AAA Accounting is not done for the additional links added to Multilink PPP bundle when "aaa accounting delay-start" is configured. Workaround: There is no workaround.
CSCdv19031	Currently with radius debugging turned on customers see a lot of debugs describing attributes in the packets sent and received. In order to reduce the amount of spewed out on the console a new option of 'brief' needs to be added the 'debug radius' command. This option will only indicate I/O transactions with some packet header information. Customers not turning on debugging or, not doing RADIUS wont see this problem.
CSCdv19928	When the Idle-Timeout attribute is received from RADIUS on an asynchronous interface, a vaccess interface is created and the timeout is not applied directly to the asynchronous interface. The Idle-Timeout attribute still works. The only side effect is that there is an extra vaccess created that is bound to the asynchronous interface. Workaround: There is no workaround.
CSCdv20977	Incoming Multilink Point-to-Point Protocol (MLP) packets from an ATM interface are getting process switched when a virtual template is used for the MLP bundle configuration.
CSCdv26709	Certain values for Ascend-Disconnect-Cause and Ascend-Connect-Progress are recorded inaccurately in Stop messages. This is mainly observed in 122T train. This problem is observed with PPP sessions when using RADIUS Accounting. Workaround: There is no workaround.
CSCdv29468	If a PPP client does not authenticate after agreeing to do so during LCP negotiation, the PPP session will continue to stay open in this limbo state until the client disconnects the session.
CSCdv33270	Under certain conditions, resources may be associated with a virtual private dialup network (VPDN) group even when there are no active calls. Workaround: There is no workaround.
CSCdv33313	When network accounting is performed for PPP over ATM (PPPoA) sessions, RADIUS "start" or "stop" accounting records may occasionally fail to be sent. There is no workaround. Under certain conditions on a LAC, if the session is a VPDN forwarded session and the connection to the LAC is a dedicated serial line, memory can be leaked because AAA misses the stop record, so it never cleans up the AAA data for the session. This will happen if the connection continuously tries to renegotiate then attempt forwarding, which never succeeds. Eventually, the client sends a TERMREQ which restarts the session, but AAA does not get a NET STOP event so memory is leaked.
CSCdv34768	A Cisco router running IOS may show the following traceback when using "local-case" authentication: 00:05:16: %AAA-3-BADMETHOD: Cannot process authentication method 2160756888 -Process= "AAA Server", ipl= 0, pid= 26 -Traceback= 8016F170 8016A6C8 8016AED0 8016B048 8019A94C Workaround: There is no workaround.
CSCdv40116	Reverse-access Authorization fails if the method used is Radius. Radius mandatory attribute "port" is not properly obtained causing this authorization failure. Workaround: There is no workaround.
CSCdv40729	In a plain bri-pri (Peer - NAS) scenario, when a call is disconnected with the command 'clear in serial0:23' on the NAS, the Ascend-Disconnect-Cause value generated is '0' (No-Reason). When the call is brought down by clearing the interface on the peer, it is given a value(63). If brought down by doing 'shutdown' on peer/NAS value 11 is generated. The problem occurs only with by doing clear interface on the NAS.
CSCdv41871	Ping fails when non-mlppp call is up on B-channel previously used to terminate mlppp call.
CSCdv43136	We may see some unexpected debug information during call suspend. Those debug information doesn't cause any side effect beside displaying unexpected debug information.
CSCdv43856	aaa attr debug does not show the tag added. This is seen in Cisco IOS Release 12.2(4.2)PI. This is just a problem in debug and will not affect any other functionality.
CSCdv54349	When running Cisco IOS Release 12.2(5.2)T and later IOS images, you may be unable to do local AAA authentication. Workaround: There is no workaround. Either do AAA to a remote server or downgrade to an earlier release of code.
CSCdv62649	The command ip tacacs source-interface doesn't work properly. If configured to use loopback interface for tacacs packets, router may still use interface address.
CSCdv64668	The first PAP authentication after a PPP renegotiation triggered by a CONFREQ from the client will fail even though the RADIUS/TACACS+ server returns a success. Workaround: There is no workaround.
CSCdv67009	The following error message may be seen on a Cisco voice gateway running the Session Initiation Protocol (SIP): Nov 24 20:24:12: %SIP-3-BADPAIR: Unexpected event 14 (SIPSPI_EV_CC_CALL_CONNECT) in state 8 (STATE_DISCONNECTING) substate 0 (SUBSTATE_NONE) -Traceback= 60DAD08C 60DAD7AC 6040ACD4 6040ACC0. This indicates that the call was cancelled while it was in the process of being brought up. This message can be safely ignored.
CSCdv76649	When the customer tries to use ^C to abort the copy operation when he prompted for confirmation, he can't break out of the copy process.
CSCdv78693	Spurious memory access messages appear on gatekeepers when an URQ without a call signal address in it is sent to Gateway. Workaround: There is no workaround.
CSCdv79210	A Cisco router gradually looses memory when Media Gateway Control Protocol (MGCP) calls are originated on the router. Workaround: There is no workaround.
CSCdv83040	When using Ascend RADIUS attribute 242, IP protocols of 50 and 51 will not be accepted. This will cause users with these IPsec protocols set in their profile to be disconnected.
CSCdv83402	A PPPoE/PPPoA aggregation router may unexpectedly reload when many PPP events happen in a short amount of time. The router will display a STACKLOW message before reloading.
CSCdv87754	Symptom: A Cisco AS5850 Route Switch Controller incorrectly attempts to repeatedly netboot a Cisco IOS image if it cannot find the specified boot system image on its compact flash. The system interprets the full path of the configured boot image that failed as the image it should netboot. Messages similar to the following are observed: Sleeping for 2 secs before next netboot attempt %SYS-6-READ_BOOTFILE_FAIL: disk0:c5850-p9-mz File boot failed -- File not accessible. The correct behavior for a bootloader if it cannot find any specified boot images at reload time is to fall back and request the system to run the first image it can find off disk0: or bootflash: Conditions: Cisco AS5850 Route Switch Controllers with Cisco IOS 12.2(2)XB1 or Cisco IOS 12.2(2)XB2 bootloaders may experience this problem at reload time if the boot system image configuration points to a file on disk0: that does not exist. Workaround: Ensure that the boot system image configuration points to an existing and valid image on disk0:, provide additional correct boot image locations in the configuration, or use a bootloader of version Cisco IOS 12.1(5)XV3.
CSCdw00019	Although SGBP tunnels will still be up, SGBP bidding itself might stop working after a router has been up for sometime. This problem only occurs if two routers in the stack group receive two links of a bundle at the same time. Removing, and reapplying the SGBP config was sufficient to get things working again.
CSCdw01726	A Simple Network Management Protocol version 3 (SNMPv3) user is created using message digest 5 (MD5) authentication using the following commands: snmp group groupy v3 auth snmp user abcdefghij groupy v3 auth md5 abcdefghij An SNMP walk is performed, the configuration is saved, and the router is reloaded. newhope:~/src/wccp2# snmpwalk -v 3 -u abcdefghij -A abcdefghij -a MD5 -l AuthNoPriv 194.12.224.11 It is working and a debug snmp header shows this: Incoming SNMP packet : v3 packet security model: v3 security level: auth username: abcdefghij A second SNMP walk is performed: newhope:~/src/wccp2# snmpwalk -v 3 -u abcdefghij -A abcdefghij -a MD5 -l AuthNoPriv 194.12.224.11 After the second SNMP walk is performed, the command does not return any output and the debug snmp headers show this: Incoming SNMP packet : v3 packet security model: v3 security level: noauth : username: abcdefghij Workaround: There is no workaround.
CSCdw02945	Symptom: Incoming calls may fail to create a virtual profile even though the router is configured for this. Conditions: This problem may occur in a dial up environment where a virtual profile virtual template is defined but where no AAA authorization has been enabled This issue only occurs in Cisco IOS Release 12.2 T. Workaround: A workaround is to configure AAA authorization e.g., aaa authorization network default local
CSCdw06322	The following error message may be seen on a Cisco voice gateway running the Session Initiation Protocol (SIP): Nov 24 20:24:12: %SIP-3-BADPAIR: Unexpected event 14 (SIPSPI_EV_CC_CALL_CONNECT) in state 8 (STATE_DISCONNECTING) substate 0 (SUBSTATE_NONE) -Traceback= 60DAD08C 60DAD7AC 6040ACD4 6040ACC0. This indicates that the call was cancelled while it was in the process of being brought up. This message can be safely ignored.
CSCdw09542	Before this fix, per-user authorization required a service type of Outbound in the Radius profile.
CSCdw11765	PPP Link Control Protocol (LCP) is not accepting sent CONFACK negotiated on a asynchronous interface for a virtual profile. Workaround: There is no workaround.
CSCdw13432	When the called party is busy in a two-stage call scenario, the calling party may not hear a busy tone and the call terminates immediately. This behavior is observed with Cisco IOS Release 12.2(2)XB, Release 12.2(7), and some earlier Cisco IOS Release 12.2 releases. Workaround: There is no workaround.
CSCdw18785	When a 302 redirect is received after a 18x with a COntact header the outgoing INVITE will have the request uri of the Contact in the 18x. It should use the Contact of the 302. A workaround is disabling rel1xx on the router.
CSCdw23836	When a 18x is received which was sent reliably, a PRACK needs to be sent. Subsequent 18x's received that match the previous one's call leg do not receive a PRACK. A workaround is to disable reliable provisional responses.
CSCdw25746	Symptom: Cisco Voice Gateways may experience a reload especially when running high levels of traffic. Conditions: This problem may be experienced in Cisco IOS Release 12.2(2)XB2 and Cisco IOS Release 12.2 mainline releases. Workaround: There is no workaround.
CSCdw28786	When the customer tries to use ^C to abort the copy operation when he prompted for confirmation, he can't break out of the copy process.
CSCdw30994	When downloading IP pools from a AAA server, there is no way to define a non-contiguous range of addresses using multiple statements like this: "ip:pool-def#1=aol-pool 192.168.232.0 192.168.237.255", "ip:pool-def#2=aol-pool 192.168.238.1 192.168.238.160" When those statements are applied, the second pool-def overwrites the first one. Defining the pools on the command line yields the expected result. This only happens in Cisco IOS Release 12.2(2)XB ED release train. Cisco IOS Release 12.1/Cisco IOS Release 12.2 does not exhibit this behavior.
CSCdw35046	A Cisco router may reload when proxied RADIUS is used for authentication and accounting. Workaround: There is no workaround.
CSCdw35930	The command aaa authentication attempts login <n> appears in the configuration if the command tacacs-server attempts <n> is present in the configuration. Changes to either command will be reflected in the other. Also, the number of attempts granted is actually one less than the number configured. The workaround is to configure one more attempt than the number you actually want.
CSCdw42441	When T1 CAS goes down cause FRF5(DLCI) inactive state. The problem happens when T1 1 goes down, it deactivates the FRF5 dlci.
CSCdw43862	For some devices that are not conforming to V.110 async to sync padding requirements, this cli command allow the users to disable the padding.
CSCdw46065	A Cisco router that is used as a gateway may reload if one of multiple record routes that are received on the gateway is invalid. Workaround: There is no workaround.
CSCdw53071	If a second call is made after the first call is completely disconnected (by hanging up the phone instead of using the flash feature to switch between two calls), the second call may fail. Workaround: There is no workaround.
CSCdw53243	In a Cisco Signaling System 7 (SS7) Interconnect for Voice Gateways solution, if a Cisco AS5400 universal access gateway receives an incoming time-division multiplexing (TDM) call (NI-2, PRI, channel-associated signaling [CAS]) with a called number that does not match a configured dial-peer, the call will be connected to a modem, and a modem tone will be played back to the calling party. This is normal behavior, however there is no configurable option for such to be rejected instead of being treated as a modem call.
CSCdw62969	A network access server (NAS) that is running Cisco IOS Release 12.2(02)XB3 or Release 12.2(8)T may reload when Layer 2 forwarding (L2F) virtual private dial-up network (VPDN) calls are placed using an authentication, authorization, and accounting (AAA) VPDN user profile that does not contain the RADIUS class (25) attribute. Workaround: Configure a dummy RADIUS class (25) attribute in the VPDN user profile on the AAA server.
CSCdw66251	SIP gateway midcall INVITE requests in the called to calling party direction will have the Route header constructed incorrectly. ACK requests in the called to calling party direction will have the request URI constructed incorrectly. This could cause some operations such as T.38 fax relay to fail. This problem can occur only if two or more SIP proxies are in the SIP signalling path and the Record Route feature is enabled. Workaround: There is no workaround.
CSCdw68658	The gateway will reject a mid-call Invite with hold sdp where the connection information (c line) is set to 0.0.0.0 and the port number of the media description (m line) is also set to 0. Instead of responding with a 200 OK response, the gateway will return a 488 Media Unacceptable response. The problem will not occur if the user agent placing the gateway on hold, sets the port number to a value other than 0. Workaround: There is no workaround.
CSCdw77524	When rtp payload-type cisco-codec-fax-ind is changed from 96 to 99 then we ingress an invite with sdp rtp payload type 96 nte the gateway responds with an rtp payload type 97. These 2 payload types are chosen for the proprietary implementation of Cisco fax-relay. Per RFC2833, the gateway should not be doing this. This affects all Cisco fax gateways which support Cisco fax-relay. Work around: Use the rtp payload-type command on the Cisco gateway to change the assignment of the payload types, but this command is broken.
CSCuk25642	When using callin authentication on a LSDO call with RADIUS, PPP sends multiple authorization requests to AAA. This will slow down call setup but have no functional impact.
CSCuk25721	RADIUS CLID attribute was missing for large scale dialout accounting.
CSCuk25947	If PPP authentication is configured on an interface and if a user negotiates a callback during a Link Control Protocol (LCP) operation, the call will fail if the user does not have any callback information configured. Workaround: There is no workaround.
CSCuk26562	AAA id debugging was not clear and displayed far too much information.
CSCuk26642	RADIUS calls with a non-RFC supported value were accepted when they should be rejected.
CSCuk27924	send-auth would not be applied on the NAS, but rather the value of auth-type would be used instead.
CSCuk28445	We now store a generic 'wrapper' record which holds information in the tree, generic to all accounting records. This way, we are not impacted by the life-span of any one accounting record.

Open Caveats—Cisco IOS Release 12.2(2)XB3

There are no open caveats specific to Cisco IOS Release 12.2(2)XB3 that require documentation in the release notes.

Resolved Caveats—Cisco IOS Release 12.2(2)XB3

All the caveats listed in this section are resolved in Cisco IOS Release 12.2(2)XB3. This section describes only severity 1 and 2 caveats and select severity 3 caveats.

An error can occur with management protocol processing. Please use the following URL for further information:

Open and Resolved Caveats—Cisco IOS Release 12.2(2)XB2

There are no open and resolved caveats specific to Cisco IOS Release 12.2(2)XB2 that require documentation in the release notes.

Open and Resolved Caveats—Cisco IOS Release 12.2(2)XB1

Open Caveats—Cisco IOS Release 12.2(2)XB

This section documents possible unexpected behavior by Cisco IOS Release 12.2(2)XB and describes only severity 1 and 2 caveats and select severity 3 caveats.

Symptom: Back-to-back MGCP second stage dialing calls may fail. The second (and all subsequent) requests for digit detection may not receive NTFY messages containing the detected digits so the Call Agent will not know that the gateway received the digits.

then the digits detected for the second RQNT will NOT be sent in a NTFY. No digits will be detected on that endpoint until either a DLCX WITH an "X:" parameter is sent OR any message with an empty "R:" parameter is sent.

Conditions: This problem has been reproduced on 5400 universal gateways but will be present for any MGCP gateway.

Workaround: There are two possible workarounds. Both involve modifications to the messages sent from a Call Agent:

Resolved Caveats—Cisco IOS Release 12.2(2)XB

There are no resolved caveats specific to Cisco IOS Release 12.2(2)XB that require documentation in the release notes.

Table of Contents

Release Notes for Cisco MC3810 Multiservice Access Concentrators for Cisco IOS Release 12.2(2)XB15

Contents