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Note You can find the most current Cisco IOS documentation on Cisco.com. |
These release notes for the Cisco Catalyst 4224 Access Gateway Switch describe the software features provided in Cisco IOS Release 12.2(2)YC4. These release notes are updated as needed.
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Note Media Gateway Control Protocol (MGCP) is not supported even though it appears in the documentation and the CLI. |
These release notes describe the following topics:
The Cisco Catalyst 4224 Access Gateway Switch is:
This section describes the system requirements for Cisco IOS Release 12.2(2)YC4 and includes the following sections:
| Platforms | Image Name | Software Image | Flash Memory Recommended |
DRAM Memory Recommended |
Runs From |
|---|---|---|---|---|---|
| Cisco c4224 | |||||
Cisco IOS Release 12.2(2)YC4 supports the Cisco Catalyst 4224 Access Gateway Switch.
To determine the version of Cisco IOS software running on your Cisco Catalyst 4224, log in to the Cisco Catalyst 4224 and enter the show version EXEC command:
The following Cisco proprietary MIBs are supported:
The following MIBs are supported:
Cisco IOS Release 12.2(2)YC4 does not support:
The following reported bugs have been fixed or resolved in Cisco IOS Release 12.2(2)YC4:
The maximum configurable clock rate on the WIC-2T card is 4 Mbps in the Cisco Catalyst 4224. In the Cisco 3640 and Cisco 2600, the WIC-2T card's configurable clock rate is 8 Mbps. There is no workaround.
While fixing vulnerabilities mentioned in the Cisco Security Advisory: Multiple SSH Vulnerabilities (http://www.cisco.com/warp/public/707/SSH-multiple-pub.html), we inadvertently introduced an instability in some products. When an attacker tries to exploit the vulnerability VU#945216 (described in the CERT/CC Vulnerability Note at http://www.kb.cert.org/vuls/id/945216), the SSH module will consume too much of the processor's time, effectively causing a Denial of Service (DoS). In some cases the device will reboot. In order to be exposed, enable SSH on the device.
No other Cisco product is vulnerable. It is possible to mitigate this vulnerability by preventing or controlling the SSH traffic.
This advisory is available at http://www.cisco.com/warp/public/707/SSH-scanning.shtml.
The IOS Firewall Feature set, also known as Cisco Secure Integrated Software, also known as Context Based Access Control (CBAC), and introduced in Cisco IOS Release 11.2P, has a vulnerability that permits traffic normally expected to be denied by the dynamic access control lists.
This vulnerability is documented as Cisco Bug ID CSCdv48261.
No other Cisco product is vulnerable.
This advisory is available at http://www.cisco.com/warp/public/707/IOS-cbac-dynacl-pub.shtml.
If a router receives an Address Resolution Protocol (ARP) packet that has the router's own interface address but with a different MAC address, the ARP packet can overwrite the router's own MAC address in the ARP table, causing that interface to stop sending and receiving traffic. This attack is successful only against interfaces on the Ethernet segment that is local to the attacking host.
Workaround: Hard code the interface's ARP table entry by using the arp ip-address hardware-address type [alias] global configuration command. This entry will remain in the ARP table until the no arp ip-address hardware-address type [alias] global configuration command is issued.
Refer to the advisory at the following URL: http://www.cisco.com/warp/public/707/IOS-arp-overwrite-vuln-pub.shtml
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Note CSCdu81936 does not apply to switches that run Cisco CatOS software. This caveat applies only to switches running Cisco IOS software. |
A segmentation violation (SegV) exception may cause a router to reload unexpectedly. There is no workaround.
Symptoms: Unable to configure PSTN Fallback
Condition: Problem observed in c4gwy-io3sx3-mz.122-10.7.T6
Symptom: show tech-support command output is inconsistent.
Condition: Tested with c4gwy-io3sx3-mz.122-10.7.T6 and c4gwy-io3sx3-mz.122-11.5.T images.
Symptoms: Unable to configure Resource Threshold in Cisco Catalyst 4604 and Cisco Catalyst 4224.
Conditions: Tested with the following images: c4gwy-ik8o3sx3-mz.122-10.7.T6, c4gwy-io3sx3-mz.122-10.7.T6.
Problem: Transparent Common Channel Signaling (TCCS) trunk on Cisco Catalyst 4224 does not come up.
Description: Configure the TCCS on units under test UUT1 and UUT2, where UUT2 is a Cisco Catalyst 4224.
Topology: Originating RTR <+++++++>UUT1----VOIP-----UUT2<+++++> Terminating Router.
Symptoms: Unable to configure clear channel codec required to pass on D-channel transparent over the VOIP Cloud.
T.38 fax relay support has been added.
Symptoms: Analog phones connected to the Eight-Port FXS RJ21 Analog Interface Card may not receive a dial tone.
Conditions: This symptom is observed in either of the following situations:
1. Configuration download is enabled with two or more contiguous directory numbers assigned to the high-density FXS module. The configuration is then downloaded with a reset or restart of the system. No dial tone will result.
2. Two or more contiguous dial peers are configured on the switch or router assigned to the high-density FXS module. The user enters the following commands for each assigned FXS port:
The dial peer configurations affecting the voice port are entered as:
No dial tone will be heard on any of the analog ports.
Workaround: Disable the configuration download. Reload the system.
Symptom: Multilink Frame Relay (FRF.16) is not available in Cisco Catalyst 4224.
Conditions: Entering the interface mfr global configuration command results in the "% Invalid input detected" error message.
Symptom: Multilink PPP over Frame Relay (MLPoFR) is not available in Cisco Catalyst 4224.
Conditions: Enter Frame-relay sub-interface mode. The option "ppp" is missing under the frame-relay DLCI configuration mode to enable MLPoFR.
Symptom: Unable to configure Traffic Policing in Cisco Catalyst 4224.
Conditions: Create a class-map and attach the same to a policy-map. Try to configure Traffic Policing under the class. The police QoS policy-map class configuration command will be missing.
Symptom: The quality of voice traffic may be degraded.
Conditions: This symptom is observed when voice traffic is sent over a saturated serial link on a Cisco Catalyst 4224 that has low latency queueing (LLQ) configured.
When Pre-Fragmentation is enabled (as it is by default), packets larger than the MTU are dropped. Packets smaller than the MTU are not affected.
Workaround: Disable Pre-Fragmentation or use process switching.
Symptoms: A PRI trunk may go out of service. This symptom occurs when an inbound call from a PBX is received on a PRI trunk and when an access code is dialed to access the PBX (the same PBX that originated the call). Subsequent calls that are made on the PRI trunk do not go through.
Conditions: This symptom is observed on a PRI trunk when calls are hairpinned on a Cisco Catalyst 4000 Access Gateway Module (AGM) that is running the c4gwy-io3sx3-mz.122-10.7.T6 image of Cisco IOS Release 12.2(10.7)T6.
Workaround: Restart the controller or reload the router.
Unable to make E1 E&M CAS calls in Cisco Catalyst 4224 when E&M voice port sends out 1111 as the busy signal instead of the 1101 signal that most PBXs expect.
Condition: Not all PBXs or router are able to recognize 11111 as an E1 E&M port seize signal. Most Cisco routers have no problem handling the signal. Tested with c4224-io3sx3-mz.YC3.
Workaround: Add the following configuration at the E&M voice port: condition tx-c-bit off.
Symptoms: Open Shortest Path First (OSPF) does not recognize the virtual interface of the VLAN when intra-area OSPF is configured.
Conditions: This symptom is observed on a unit under test (UUT) switch that is running Cisco IOS Release 12.2. Because of this symptom, routing updates across the UUT fail.
Workaround: Add the ip ospf network broadcast interface configuration command to the switch virtual interface (SVI). Even though the error messages still appear, OSPF updates take place.
An idle line will require approximately one second to process each character received with the high bit set. This may delay the start of an exec by the normal activation-character.
Workaround: None. Try using a shorter cable.
Internet Security Association and Key Management Protocol (ISAKMP) security association (SA) negotiation fails with c4224-ik8o3sx3-mz-ei_throttle_yc_release_0905. Because of this, all the encryption tests fail. This is true for all the Transform sets and Routing Protocols.
Enabling multicast fast switching may result in spurious accesses that cause high CPU utilization. There is no workaround.
Problem: When configured as an RTR responder, the Cisco Catalyst 4224 gives incorrect jitter data.
Symptoms: The show rtr collection-statistics EXEC command on the RTR client router displays very high jitter statistics.
Description: An analog voice port configured with alaw companding port may experience excessive noise. The port also may not recognize DTMF digits in this configuration. Calls can still be received but there will be noise.
Workaround: Use A-to-u law transcoding at the T1/E1 or VoIP port.
Description: Memory corruption in tplus_encode_ulong. Under unknown conditions, a Cisco router running 12.2(3.4)T or a later release, and using TACACS+ accounting, may reload due to memory corruption.
Workaround: Disable TACACS+ accounting.
Description: Low latency queueing (LLQ) does not drop packets after configuration changes. If the configured LLW burst size is changed in a policy map that is attached to an interface but the configured LLQ bandwidth is not changed, priority queueing (PQ) will stop dropping packets. If the traffic going through PQ is much greater than the configured bandwidth, the minimum bandwidth guarantees of the classes are not met.
Workaround: Remove and re-attach the service policy.
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Note MGCP is not supported in this release even though MGCP appears in the documentation and the CLI. |
This section lists unresolved caveats that apply to this release of the Cisco Catalyst 4224 Access Gateway Switch. Caveats describe unexpected behavior or defects in the switch and its related software.
Description: If IP phones and Fast Ethernet ports are hard coded for speed and/or duplex, phones will never power up.
Workaround: Set both IP phone and Fast Ethernet ports for AUTO negotiation.
Description: SNMP query to cpmCPUTotalTable returns incorrect values.
Description: SNMP response for the variable card type returns unknown (1) when the following cards are inserted in the Cisco Catalyst 4224:
Without this variable, these cards cannot be found in Cisco View.
Description: IP address table rows cannot be created or modified by using SNMP.
Description: The rows in ipNetToMediaTable cannot be created or modified by using SNMP.
Description: DiffServe CodePoint (DSCP) marking for voice packets is broken.
Description: Cannot transfer inbound VoIP calls between IP phones in SRST mode.
The following sections describe the documentation available for the Cisco Catalyst 4224 Access Gateway Switch. These documents consist of hardware and software installation guides, Cisco IOS configuration guides and command references, system error messages, and other documents.
Use these release notes with these documents:
These documents are available for the Cisco Catalyst 4224 Access Gateway Switch on Cisco.com and on the Documentation CD-ROM:
On Cisco.com at:
Technical Documents: Documentation Home Page: Catalyst Switches: Catalyst 4224
On the Documentation CD-ROM at:
Cisco Product Documentation: Catalyst Switches: Catalyst 4224
The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents. The Cisco IOS software documentation set is shipped with your order in electronic form on the Documentation CD-ROM, unless you specifically ordered the printed versions.
Each module in the Cisco IOS documentation set consists of one or more configuration guides and one or more corresponding command references. Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality, and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference.
On Cisco.com at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.2: Configuration Guides and Command References
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.2: Configuration Guides and Command References
Table 2 lists the contents of the Cisco IOS Release 12.2 software documentation set. These documents are available in electronic form and in printed form if ordered.
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Note You can find the most current Cisco IOS documentation on Cisco.com . |
On Cisco.com at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.2
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.2
These sections explain how to obtain documentation from Cisco Systems.
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If you are a Cisco.com registered user, and you cannot resolve your technical issues by using the Cisco TAC Web Site, you can open a case online by using the TAC Case Open tool at this URL:
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If you have Internet access, we recommend that you open P3 and P4 cases through the Cisco TAC Web Site.
The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a case.
To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to this URL:
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This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Copyright © 2002, Cisco Systems, Inc.
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Posted: Wed Jan 15 04:09:49 PST 2003
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