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Table of Contents

Cisco IOS Release 12.0(19) Release Notes for LightStream 1010 ATM Switch Software

Cisco IOS Release 12.0(19) Release Notes for LightStream 1010 ATM Switch Software

August 15, 2001

LightStream 1010 ATM Cisco IOS Release 12.0(19)

Text Product Number OL-1201-03

This document describes the features and caveats for Cisco IOS Release 12.0(19) for the LightStream 1010 ATM switch software. This software is based on Cisco IOS Release 12.0(18).

Contents

This document includes the following sections:

Introduction

The LightStream 1010 ATM switch provides switched ATM connections to individual workstations, servers, LAN segments, or other ATM switches and routers using fiber-optic, unshielded twisted-pair (UTP), and coaxial cable.

Note   The ATM switch processor and port adapters can be installed in the Catalyst 5500 switch chassis.

Version and Part Number Matrix

Table 1 lists the release names, versions, and part numbers used with the LightStream 1010 ATM switch.


Table 1: Release Name to Version and Part Number Matrix
Release Name Release Version Part Number

WAS1-1

11.1.(4)

SF-WAS1-11.1.4

WAS1-2

11.1.(401)

SF-WAS1-11.1.401

WAS1-3

11.1.(6)

SF-WAS1-11.1.6

WAS1-4

11.1.(8)

SF-WAS1-11.1.8

WAS1-5

11.1.(9)

SF-WAS1-11.1.9

WAS1-6

11.1.(11)

SF-WAS1-11.1.11

WAS2-1

11.1.(401)

SF-WAS2-11.1.401

WAS2-2

11.1.(6)

SF-WAS2-11.1.6

WAS2-3

11.1.(8)

SF-WAS2-11.1.8

WAS2-4

11.1.(9)

SF-WAS2-11.1.9

WAS2-5

11.1.(11)

SF-WAS2-11.1.11

WAS3-1

11.2(2)WA3(1a)

SF-WAS3-11.2.2

WAS3-2

11.2(5)WA3(2b)

SF-WAS3-11.2.5

WAS3-3

11.2(8)WA3(3)

SF-WAS3-11.2.8

WAS3-4

11.2(10)WA3(4)

SF-WAS3-11.2.10

WAS3-5

11.2(12)WA3(5)

SF-WAS3-5

WAS3-6

11.2(15)WA3(6)

SF-WAS3-6

WAS3-7

11.2(15)WA3(7)

SF-WAS3-7

WAS4-1

11.2.0(8.0.1)FWA4(1)

SF-WAS4-11.2.8.1S

WAS4-2

11.3(0.8)TWA4(2)

SF-WAS4-2

WAS4-4

11.3(2a)WA4(4)

SF-WAS4-4

WAS4-6

11.3(3a)WA4(6)

SF-WAS4-6

WAS4-7

12.0(2a)

SF-WAS4-7

WAS4-8

11.3(5)WA4(8d)

SF-WAS4-8

12.0(4)

12.0(4a)

SL10R2-12.0.4

12.0(5)

12.0(5)

SL10R2-12.0.5

12.0(6)

12.0(6)

SL10R2-12.0.6

12.0(7)

12.0(7)

SL10R2-12.0.7

12.0(8)

12.0(8)

SL10R2-12.0.8

12.0(9)

12.0(9)

SL10R2-12.0.9

12.0(10)

12.0(10)

SL10R2-12.0.10

12.0(11)

12.0(11)

SL10R2-12.0.11

12.0(12)

12.0(12)

SL10R2-12.0.12

12.0(13)

12.0(13)

SL10R2-12.0.13

12.0(14)

12.0(14)

SL10R2-12.0.14

12.0(15)

12.0(15)

SL10R2-12.0.15

12.0(16)

12.0(16)

SL10R2-12.0.16

12.0(17)

12.0(17)

SL10R2-12.0.17

12.0(18)

12.0(18)

SL10R2-12.0.18

12.0(19)

12.0(19)

SL10R2-12.0.19

System Requirements

This section describes the system requirements for Release 12.0(19) and includes the following sections:

Memory Requirements

The standard default DRAM memory for the LightStream 1010 ATM switch is 64-MB DRAM (MEM-ASP64M).

Hardware Supported

Table 2 lists the interfaces supported on the LightStream 1010 ATM switch and byCisco IOS Release 12.0(19), and their minimum software release requirements.


Table 2: Supported Interfaces and Their Minimum Software Requirements
Part Number Description Minimum Software Requirement

WAI-OC3-4MM

4-port STS-3c/STM-1 multimode fiber port adapters

WAS1-1

WAI-OC3-4SS

4-port STS-3c/STM-1 single-mode fiber port adapters

WAS1-1

WAI-OC3-4U5

4-port STS-3c/STM-1 UTP-5 port adapters

WAS1-1

WAI-OC3-4SSLR

4-port STS-3c/STM-1 SMF long reach port adapters

WAS3-2

WAI-OC3-1S3M

OC-3 mix port adapter module, 1 IR+ port and 3 MM ports

WAS3-1

WAI-OC12-1MM

1-port STS-12c/STM-4c multimode fiber port adapters

WAS1-2

WAI-OC12-1SS

1-port STS-12c/STM-4c SMF port adapters

WAS1-1

WAI-OC12-1SSLR

1-port STS-12c/STM-4c SMF long reach port adapters

WAS3-2

WAI-ATM25-12P

12-port ATM 25 port adapters with 96-pin telco cable

WAS3-2

WAI-T3-2BNC

2-port DS-3 port adapters

WAS1-1

WAI-E3-2BNC

2-port E3 port adapters

WAS1-1

WAI-T3-4BNC

4-port DS-3 port adapters

WAS3-1

WAI-E3-4BNC

4-port E3 port adapters

WAS3-3

WAI-T1-4RJ48

4-port T1 (ATM) with RJ-48 interface port adapters

WAS3-1

WAI-E1-4RJ48

4-port E1 (ATM) with RJ-48 interface port adapters

WAS3-1

WAI-E1-4BNC

4-port E1 (ATM) with BNC interface port adapters

WAS3-1

WAI-T1C-4RJ48

4-port T1 (circuit emulation) with RJ-48 interface port adapters

WAS3-1

WAI-E1C-4RJ48

4-port E1 (circuit emulation) with RJ-48 interface port adapters

WAS3-1

WAI-E1C-4BNC

4-port E1 (circuit emulation) with BNC interface port adapters

WAS3-1

L1010-ASP-B-FC1

ASP1 with FC-per-class Queuing (FC-PCQ2)

WAS1-3

L1010-ASP-B-FCPFQ

ASP1 with FC-per-flow Queuing (FC-PFQ3)

WAS4-1

L1010-PWR-DC

Power Supply DC

WAS3-1

1ASP = ATM switch processor
2FC-PCQ = feature card per-class queuing
3FC-PFQ = feature card per-flow queuing

Determining Your Software Release

To determine the version of Cisco IOS software currently running on the LightStream 1010 ATM switch, log in to the switch and enter the show version EXEC command. The second line in the following sample output from the show version command indicates the version number:

Cisco Internetwork Operating System Software IOS (tm) LS1010 WA4-5 Software (LS1010-WP-M), Version 12.0(19)

Additional command output lines include more information, such as processor revision numbers, memory amounts, hardware IDs, and partition information.

Feature Set Tables

The Cisco IOS software is packaged in feature sets, or software images, that vary according to the platform. Table 3 lists the Cisco IOS software feature sets available for the LightStream 1010 ATM switch in Cisco IOS Release 12.0(19), along with those features supported in previous releases.


Table 3: Feature Sets Supported by the LightStream 1010 ATM Switch 
Feature Set 12.0(19) 12.0(18) 12.0(17) 12.0(16) 12.0(15) 12.0(14) 12.0(13) 12.0(12) 12.0(11) 12.0(10) 12.0(9) 12.0(7) 12.0(6) 12.0(5) 12.0(4) 12.0(2a) 11.3(3a) WA4(6)

Left-justified E.164 AFI support

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

SNMP1

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Asynchronous support

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

PPP2 (SLIP3/PPP)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

IP4

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

NTP5

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

TACACS+6

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Telnet

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Point-to-point and point-to-multipoint permanent VCCs7 and VPCs8

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Point-to-point and point-to-multipoint switched VCCs and VPCs (UNI 3.0)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Point-to-point and point-to-multipoint switched VCCs and VPCs (UNI 3.1)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Point-to-point and point-to-multipoint switched VCCs and VPCs (UNI 4.0)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Multipoint-to-point UNI signaling

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Soft VCCs and VPCs

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

VP tunneling

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

VPI/VCI range support in ILMI 4.0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

PNNI hierarchy

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ILMI version 4.0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

IISP9

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

LANE10 client (LEC11) and LANE Services (LES12/BUS13/LECS14) on ASP15

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Token Ring LANE services

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM ARP16 server on ASP

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM ARP client on ASP

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM tag switch router (TSR)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Port snooping

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

OAM17 F4 and F5

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

E.164 address translation

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

E.164 autoconversion

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Circuit emulation

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM access lists

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM accounting

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM RMON18

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Multiple, weighted, dynamic thresholds for selective packet marking and discard

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Shaped VP tunnels for CBR traffic (FC-PFQ only)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Substitution of other service categories in shaped VP tunnels (FC-PFQ feature cards only)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Dual leaky bucket policing (FC-PFQ feature cards only)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Scheduler/Service Class/PVC configuration for FC-PFQ feature cards

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Logical multicast support (up to 254 leaves per output port, per point-to-multipoint VC) (FC-PFQ feature cards only)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Network clocking enhancements for smooth switchover (FC-PFQ feature cards only)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Per-VC or per-VP nondisruptive snooping (FC-PFQ feature cards only)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Support for non-zero MCR19 on ABR connections (FC-PFQ feature cards only)

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Access lists on ILMI registration

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

CUGs

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM soft restart

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

ATM accounting enhancements

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

CISCO-SYSLOG-MIB support

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

CISCO-CONFIG-COPY-
MIB support

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Signaling diagnostics and MIB

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Supplemental AToM MIB

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

1SNMP = Simple Network Management Protocol
2PPP = Point-to-Point Protocol
3SLIP = Serial Line Internet Protocol
4IP = Internet Protocol
5NTP = Network Time Protocol
6TACACS+ = Terminal Access Controller Access Control System Plus
7VCCs = virtual channel connections
8VPCs = virtual path connections
9IISP = Interim-Interswitch Signaling Protocol
10LANE = LAN Emulation
11LEC = LAN Emulation Client
12LES = LAN Emulation Server
13BUS = broadcast and unknown server
14LECS = LAN Emulation Configuration Server
15ASP = ATM switch processor
16ARP = Address Resolution Protocol
17OAM = Operation, Administration, and Maintenance
18RMON = remote monitoring
19MCR = minimum cell rate

New and Changed Information

This section contains information about new features that appear in this and previous releases of Cisco IOS Release 12.0 and Cisco IOS Release 11.3.

Note   See Table 3 for a complete list of features supported by this and previous releases.

New Features in Cisco IOS Releases 12.0(2a) Through 12.0(19)

There are no new features in these releases.

New Cisco IOS Release 11.3(3a)WA4(6) Features

The following features have been added to the LightStream 1010 ATM switch software:

Caveats

This section lists the caveats and corrected caveats for each release. Use Table 4 to determine the status of a particular caveat and its relevancy to your software release. In the table, "C" indicates a corrected caveat, and "O" indicates an open caveat. These caveats are described in detail in the next section, "Caveat Symptoms and Workarounds."


Table 4: Cisco IOS Release Caveats and Caveats Corrected Reference
DDTS Number 12.0(19) 12.0(18) 12.0(17) 12.0(16) 12.0(15) 12.0(14) 12.0(13) 12.0(12) 12.0(11) 12.0(18) 12.0(9) 12.0(8) 12.0(7) 12.0(6) 12.0(5) 12.0(4) 12.0(2a) 11.3(3a) WA4(6)

CSCdt40530

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CSCds40925

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CSCds21312

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

 

 

 

CSCdr96649

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

 

 

 

CSCdr68425

C

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

CSCdr36952

C

C

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

CSCdr18334

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

 

 

CSCdr16095

C

C

C

C

C

C

C

C

O

 

 

 

 

 

 

 

 

 

CSCdr07165

O

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

CSCdr00694

C

C

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

CSCdp97152

O

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

CSCdp96164

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

 

CSCdp83777

O

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

CSCdp80826

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

 

CSCdp75180

C

C

C

C

C

C

C

C

C

C

O

 

 

 

 

 

 

 

CSCdp74762

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CSCdp72650

O

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

CSCdp66611

C

C

C

C

C

C

C

C

C

C

O

 

 

 

 

 

 

 

CSCdp63799

C

C

C

C

C

C

C

C

C

C

O

 

 

 

 

 

 

 

CSCdp56613

C

C

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

CSCdp56060

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

CSCdp49173

O

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

CSCdp07407

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

CSCdp05975

O

O

O

O

O

O

O

O

O

O

 

 

 

 

 

 

 

 

CSCdp04722

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

O

O

CSCdm91060

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

CSCdm89519

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

CSCdm58868

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

CSCdm56393

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

CSCdm52827

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

CSCdm49146

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

CSCdm48886

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

O

O

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Caveat Symptoms and Workarounds

This section summarizes caveat symptoms and suggested workarounds for the LightStream 1010 ATM switch.

Symptom: A memory leak might occur when the switch router is running the IP Simple Network Management Protocol (SNMP) process.

Workaround: None.

Symptom: On a Cisco LightStream 1010 or a Catalyst 8500 series ATM switch, when you use the show atm interface EXEC command on an ATM sub-interface, the total number of cells that are transmitted or received is shown as zero. The traffic rate on the sub-interface is shown incorrectly.

Workaround: Upgrade to the latest Cisco IOS release version.

Symptom: In some cases, you may get spurious memory access at fastAAL5PathForBusPerformance function.

Workaround: None.

Symptom: The PNNI system capability for the Type, Length, and Value (TLV) processing code can enter an infinite loop if the TLV length of any of the contained TLVs is corrupted on reception.

Workaround: None.

Symptom: In VBR-nrt, virtual circuits (VC) traversing through a virtual path (VP) tunnel can be used to calculate the limits of peak cell rate (PCR) or sustainable cell rate (SCR) by using the connection admission control (CAC) algorithm at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/atm/c8540/wa5/12_0/3a_11/atm_tech/rm.htm

This information only pertains to PVCs and not soft PVCs.

Workaround: None.

Symptom: A defect in multiple versions of Cisco IOS software will cause a router or switch to stop and reload if the Cisco IOS HTTP service is enabled and an attempt is made to browse to http://<router-ip>/%%. This defect can be exploited to produce a denial of service (DoS) attack.

Workaround: Nullify the vulnerability by disabling the Cisco IOS HTTP server, by preventing access to the port in use by the HTTP server on the affected router or switch. Or apply an access-class option to the service itself. The Cisco IOS HTTP server is not enabled by default except on a small number of router models in specific circumstances.

Please see http://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml for the latest complete version of this security advisory.

Symptom: System could crash during lane_stress test.

Workaround: None.

Symptom: SVC setups fail even when physical connectivity is established.

Workaround: Reload the switch.

Symptom: A bus error exception might occur when adding parties to a root connection.

Workaround: None.

Symptom: A Cisco router might experience problems during attempts to format, delete, or squeeze slot0 immediately after the show version command is entered or immediately after the router reloads. This is a flash timing-related issue. Commands subsequently entered will not be affected.

Workaround: None.

Symptom: The system will ignore the incoming SSCOP pdu status messages from another system and automatically reset the session after the timers expire.

Workaround: None.

Symptom: The LightStream 1010 sometimes runs out of shared memory when running LES/BUS services at a high data rate.

Workaround: Move LES/BUS to a platform that is more suitable for this service. Recommended platform is Catalyst 5000 LANE.

Symptom: When resetting a connection to an endstation, the system might crash if using
the static map command.

Workaround: None.

Symptom: OAM F5 Loopback cells not passing across ATM 25-Mbps port adapter.

Workaround: Enter the no atm oam intercept end-to-end command in global command mode.

Symptom: Using third-party equipment and trying to set up VBR-nrt across UNI 4.0/PNNI interfaces might result in an unsupported combination of traffic parameters.

Workaround: None.

Symptom: A memory leak might occur when the switch router is running the IP Simple Network Management Protocol (SNMP) process.

Workaround: None.

Symptom: Multiple tags for default route with VC merge.

Workaround: Do not assign tags to the default route.

Symptom: VP-associated code point not supported on UNI 4.0.

Workaround: None.

Symptom: New SVC or soft PVC calls from a LightStream 1010 ATM switch to a Fore ATM switch across a PNNI interface fail to connect. Connections initiated from the Fore switch do not fail.

Workaround: None.

Symptom: When fast switching an IP frame that is less than 46 bytes in length to an ATM interface, the router sets the length in the ATM adaption layer 5 (AAL5) header to 54 bytes, even though the length should be equal to the IP frame length plus the length of the AAL5 header, which is 8 bytes.

Workaround: None.

Symptom: In the Cisco IOS Release 12.0 and up, the SNMP might fail to show trace using the
VC trace application. This is caused by an incorrect cross identifier return for VCs 0/5 and 0/16.

Workaround: None.

Symptom: When hundreds of TVCs in bidirectional mode are repeatedly configured and unconfigured in a switch, VC resources might be exhausted.

Workaround: None.

Symptom: Only 99 percent of the CPU might be available when an ATM-25 is connected to ports 1 through 3 on the 4-port ATM-25 module or ports 1 through 5 and 7 through 11 on the 12-port ATM-25 module.

Workaround: None.

Symptom: The vc-merge command, activated by default, does not work with Cisco IOS Release 11.3 code. Large amounts of CRCs appear when the vc-merge command is entered.

Workaround: None.

Symptom: When a call is made over a VP tunnel, the Connection ID information element incorrectly sets the VP bits of all links to 00 (associated signaling). This setting might cause link failures outside the VP tunnel.

Workaround: None.

Symptom: ILMI keepalives might incorrectly reset the interface on the second retry of a link failure.

Workaround: None.

Symptom: In some cases, constant bit rate VCs get stuck because of excessive errors.

Workaround: None.

Symptom: After reloading the system, OC-3c and OC-12c connections come up without a problem. When a new module is inserted after the reload, the system recognizes the module. The modules appear in the output from the show hardware command and the show running config command; however, none of the ports send out any information. The input cell count increments, but the output cell count does not.

Workaround: None.

Symptom: Soft VCs showing incorrect soft VCLs and SVCLs might not connect to certain ports.

Workaround: None.

Symptom: An interface snoop configuration might crash an FC1 system.

Workaround: None.

Symptom: Systems with the FC1 card installed might crash intermittently during boot.

Workaround: None.

Symptom: Systems with customer equipment that requires a PVP value of 0 might cause the PVP tunnel to fail on the LightStream 1010 side of the network.

Workaround: Change the PVP value to a non-zero number.

Symptom: If entering the show atm vc interface command results in a status of NO HW RESOURCE for the interface, a failure might occur in mmc_close_conn.

Workaround: None.

Symptom: In certain instances SSCOP might ask the remote site to resynchronize its values so that both sides agree on the current status of these values. This request is likely in a redundant hardware failover. The system recognizes the request, but sends back a response message with a UNI 3.0 format rather than a UNI 3.1 format, so the remote side cannot recognize the response.

Workaround: None.

Symptom: When entering the show debug command on a system that is a PNNI childless uncle, an infinite loop within the pnni_debug_show command might trigger a watchdog timeout.

Workaround: None.

Symptom: When forwarding a call setup from one VP tunnel to another, dropped information elements which are mandatory when using associated signaling might cause compatibility problems with third-party equipment.

Workaround: None.

Symptom: Tag switching on the ATM trunk works, but if the same link becomes a part of the inverse multiplexing for ATM (IMA) group, tag switching might not work as expected.

Workaround: None.

Symptom: The PVC Discovery feature on a router that is connected to an ATM interface might fail to discover all the configured PVCs and soft PVCs coming from the interface. This condition occurs only when soft PVCs are present on the configuration.

Workaround: None.

Symptom: While sending heavy traffic bidirectionally, the modem might go into ring buffer overflow.

Workaround: None.

Symptom: When data is being converted from bits per second to cells per second, numbers might be rounded down when they should be rounded up.

Workaround: None.

Symptom: A system running Cisco IOS Release 11.3(5)WA4(5) or WA5(5) might report the following error message:

    LINK-3-BADMACREG: non-existent MACADDR registry for link 49
This message occurs when the system receives an LLC2 broadcast on a LANE subinterface. In some cases, the system crashes after reporting this error message.

Workaround: Use a separate management ELAN or use a built-in Ethernet port to manage the switch.

Symptom: The circuit emulation service might display an interface as up when it is experiencing Loss of Signal (LOS). In addition, alarm indication signals (AIS) might not be generated during the shutdown.

Workaround: None.

Symptom: When using a 25-Mbps port adapter, the number of leaves in a point-to-multipoint connection cannot exceed 32.

Workaround: None.

Symptom: PVCs that are terminating on a CPU port over point-to-point subinterfaces might not be accepted.

Workaround: Use multipoint subinterfaces.

Symptom: CES E1 PAM might fail to stop sending REMAIS yellow alarms when OOF appears for a short period.

Workaround: None.

Symptom: The system issues an acctngFileFull message every 10 seconds if the snmp-server enable trap atm statement is configured.

Workaround: Remove this statement from the configuration or enter the no atmacct-deb command.

Symptom: The TR-LEC might incorrectly process all registration requests received on its control distribute VC. When working correctly, it processes registration requests only when the LAN emulation client ID (LECID) in the registration message matches up with its own LECID.

Workaround: None.

Symptom: When running tag switching, no tag is created for the default route.

Workaround: None.

Symptom: When using the atm pnni node node command, the peer group leader election (PGLE) might stay in the hung state for a long time.

Workaround: None.

Symptom: When soft VPs are being created, the VPI value allocated on the switched part of the soft VP path might conflict with an existing configured PVP.

Workaround: To get the soft VP back up, either remove the PVP or create a PVP using the same VPI value that is on the peer switch.

Symptom: The system might crash with a bus error exception when entering the atm ping command on a VC if the VC has been removed through a link failure.

Workaround: None.

Symptom: A PNNI process is terminated when the associated node is either disabled or removed. Following process termination, PNNI might not clean up and release some of its data structures properly. As a result of not freeing the data structures, the associated memory is lost until the next reload.

Workaround: Reload the system.

Symptom: The SNMP agent might not be able to discover and allow PNNI-related configurations on ATM subinterfaces. An alignment error message is printed when an SNMP walk (or other SNMP get next) request is issued.

Workaround: None.

Symptom: Connections in which end-to-end delay IE is included in the CONNECT message might fail. Examples of these connections include UNI 40, CBR, and UBR-rt.

A LightStream 1010 ATM switch that is an intermediate switch passes a bad CONNECT message from one side to the other. The CONNECT message shows up as a CONNECT packet that is longer than the actual contents, with junk bytes at the end.

Workaround: None.

Symptom: Due to an infinite loop, a LightStream 1010 ATM switch with eight LAN emulation clients configured on the CPU and 300 point-to-point and 60 point-to-multipoint connections might crash unexpectedly at the find-buddy function.

Workaround: None.

Symptom: After hot swapping an OC-12 SM port adapter with an OC-12 MM port adapter, the output of the show controller command might incorrectly show the module as OC-12 SM. The module itself works.

Workaround: None.

Symptom: CES: per-VC queues might fill with cells on 64-Kbps circuits.

With standard CES 64-Kbps circuits, the per-VC queues build up with cells at a rate of about one per second. There is a mismatch between the cell-rate requested and the rate granted. This is caused by signaling a PCR of 170 cells per second, rather than the desired 172 cells per second. Because the CBR FC-PFQ traffic shaping in current software has excellent granularity, roughly a cell every two seconds is queued. After the queue fills, dropping occurs at that rate.

Workaround: None.

Symptom: Disabling tag switching on an interface that carries tagged VCs (TVCs) might not remove the TVCs. Reenabling tag switching on that interface puts it in the "not TDP ready" state.

Workaround: None.

Symptom: CES interfaces might not come up upon reload.

The line state stays at XmtAIS LossOfSignal. Sometimes the switch comes up, but the IF status of the show ces int command always shows as DOWN and the line state is RcvAIS XmtAIS.

Workaround: None.

Symptom: Crash with Cisco IOS Release 11.3(3a)WA4(6).

Data flowing over OC-12 links between two LightStream 1010 ATM switches might cause memory corruption and the Cisco IOS Release 11.3(3a)WA4(6) might crash. This crash might be caused by badly formed AAL5 packets.

Workaround: Reboot the switch.

Symptom: The snmp get command does not work for the following MIB variables:

dsx1LineIndex
dsx1TimeElapsed
dsx1ValidIntervals
dsx1LineType
dsx1LineCoding
dsx1SendCode
dsx1CircuitIdentifier
dsx1LoopbackConfig
dsx1LineStatus
dsx1SignalMode
dsx1TransmitClockSource
Workaround: None.

Symptom: The power-on diagnostic test might indicate snake-test failures from the ASP-PFQ.

If the snake test fails or the switch is not reset, the red LED on the left side of the processor remains lit. Changing out power supplies and processors does not correct this problem. Consequently, no evidence exists that this alarm indicates a failed processor.

Workaround: None.

Symptom: Crash in process_handle_watchdog might occur.

This problem is caused by a routing loop, which is caused by metric overflow in metric aggregation.

Workaround: None.

Symptom: The PNNI agent returns a value of lowestLevelOutsideLink(4) for links between nodes on the same peer group for the pnniLinkType object. The correct value is lowestLevelHorizontalLink(2).

Workaround: None.

Symptom: PNNI: There might be a crash at compare_avl_nodes.

When using the pnni_election command with a freed pnni_pdb where there are two scripts running pnni commands from different threads, the CLI command creates the pnni node and passes the pnni_pdb in the csb to be processed by the next entered command. In the meantime, SNMP deletes the node from under CLI.

Workaround: None.

Symptom: After manually configuring all the prefix and ESI addresses for LECS/LES/BUS and clients for all devices on the network and upgrading from 11.2(8.0.1)FWA4(1) to 11.3(3a)WA4(6), the LANE client on the system might not join.

Workaround: Remove the manually configured address; the LANE client comes right up.

Symptom: ADD Party over Tunnel might not work.

On a source node, if you are adding a subsequent leaf to a VP tunnel that is out of bandwidth, PNNI might reject the route request (for the leaf), leading to an eventual rejection of the ADD party by signaling.

Workaround: None.

Symptom: Left-justified AESA feature can cause the system to crash when enabling and disabling a node with 3000 e164/f69/X121 addresses.

Workaround: None.

Symptom: The ATM switch might crash if you remove a snooped subinterface by entering the no interface command and then entering the show atm snoop-vc command on the snoop interface.

Workaround: None.

Symptom: When LEC/LES/BUS are all on the same switch, a point-to-multipoint connection exists with the CPU as root and with several leaves on the CPU. When the LES sends a packet to all leaves, one packet needs to loop back to the CPU for the LEC. The code that performs loopback initializes hwidb->atm_db->fast_vc_info for the LANE client and eventually calls atm_input to queue the packet. However, another packet could come in on the same CPU port (for example, PNNI). This situation would cause hwidb->atm_db->fast_vc_info to be overwritten because hwidb is shared. When interrupt handling is complete for the new packet, the old packet might be misinterpreted as a totally different kind of packet.

Workaround: None.

Symptom: When snoop-vc is configured on a port, a switch might give the following internal error message:

    %ATMCORE-3-INTERNAL_ERROR: connUpdateFreeVxiMap: bitMapInfo null ptr.
Workaround: Ignore the message. It does not affect the snooping functionality.

Symptom: Per VC snooping is unconfigurable or broken.

Workaround: None.

Symptom: When a large amount of data is sent out of the Ethernet interface, the interface might become inundated and start generating the error message:

%SONICT-3-INTERNAL_ERROR: sonic_send: no free tbufs

The interface stops sending data and the transmitter remains stuck until the shut/no shut command sequence is entered on the interface.

Workaround: Enter the shut/no shut command sequence on the interface.

Symptom: One soft VC might not come up because the resources at the destination switch are not available. After retrying the soft VC several times, the system might crash because of memory corruption.

Workaround: None.

Symptom: You cannot use SNMP to create a soft PVC on the ATM switch.

Workaround: None.

Symptom: A ring-back tone cannot be heard from the other side of a PBX when on-hook-detect is set.

Workaround: None.

Symptom: When using more than 13 time slots with cas on-hook, the voice CBR connections might be unstable. Without on-hook-detect configuration, all CBR VCs become stable.

Workaround: None.

Symptom: ILMI might not come up upon reload of vp-mux (vuni).

ILMI on the tunnel interface (connected to the far-end peer device through a vp-mux switch and virtual UNI) has trouble staying in "WaitDevType" after reloading the vp-mux switch.

Workaround: Shut down the tunnel interface; disable the ILMI, enter the no shut command on the tunnel interface. After the interface settles down, the ILMI on the tunnel can be reenabled. Shutdown the interface. Enter the atm ilmi-enable command and atm auto-configuration command (if desired), then reenable the tunnel interface with the no shut command.

Symptom: Some LANE clients cannot join an ELAN.

The show lane command indicates that some LANE clients (still in init state as far as the LANE client router is concerned) appear in the LECS table with no information.

The show atm vc interface command indicates that some SVCs are not connected.

If the LANE clients try to join the ELAN, they are rejected.

Workaround: None.

Symptom: Funnel VCs might jeopardize quality of service (QoS) of guaranteed services.

The current multipoint-to-point funnel implementation might compromise the QoS guarantees of other connections (guaranteed services) when the application that created the funnel SVC malfunctions. For example, if the application were to transmit traffic on more than one leg of the funnel SVC simultaneously, the rate scheduler on the output interface would over-subscribe and, potentially, affect the peak cell rate (PCR), sustained cell rate (SCR), and maximum cell rate (MCR) guarantees for other VCs on the interface.

Workaround: None.

Symptom: A LightStream 1010 switch installed in a Catalyst 5500 chassis might fail to boot up when using mixed power supplies at high temperatures.

When using power supplies from different vendors on the Catalyst 5500 chassis, make sure that the supplies are powered-up in serial order. If you power up the power supplies simultaneously, the processor on the LightStream 1010 ATM switch might not come out of reset (for example, the processor might hang and not boot).

Workaround: None.

Symptom: PNNI support of left-justified E.164 AESA addresses is not available in Cisco IOS Release 11.3(0.8)TWA4(2).

Workaround: None.

Symptom: Unless it is administratively shut down, the CBR interface on the CES port adapter is always in the up/up state, even when no cable is attached. If the CBR line goes down, the interface stays up/up, and the only error reported is Linestate: LossOfSignal.

Workaround: None.

Symptom: When the ROM monitor environment variable boot is set to a nonexistent file (using the Cisco IOS boot system flash command) and the configuration register is set to 0x2102 (autoboot), the switch might hang during the subsequent reload command issued by the software.

Workaround: Power-cycle the switch; a break character is sent to the switch to force it to the ROM monitor prompt. You can then manually reboot the switch.

Symptom: A CES PVC cannot be cross connected to a VP tunnel interface.

Workaround: None.

Symptom: When hot swapping cards immediately after turning off the interrupts, the system might crash. The crash occurs because the interrupts are disabled and the hot swapping is not seen until the command is complete.

Workaround: None.

Symptom: The granularity provided by the FC-PFQ feature card scheduling hardware does not allow an exact match of all requested cell rates. To satisfy the traffic contract guarantee, the next higher available scheduling value is used. A shaped VP tunnel is used frequently to pass data to a WAN VP trunk, and limits the transmitted traffic to the scheduled rate. This might cause cells to be dropped in the WAN. Any dropping must be done prior to multiplexing onto the VP, so that a packet discard can be performed.

Workaround: Refer to the DDTs for information on how to convert a requested rate to the actual rate.

Symptom: There is a small divergence in the measured output of the shaped VP tunnels at rates of 90 Mbps and above.

Workaround: None.

Symptom: Open Shortest Path First (OSPF) does not recognize more than four parallel interfaces. This might cause some tag VCs (TVCs) to not get switched to other interfaces if a tunnel carrying the TVCs is shut down.

Workaround: Enter the clear ip route command on the switch on the interface that was shutdown, or the clear ip route command on all the switches to bring everything back up. If entering the clear ip route command does not work, enter the shut/no shut command on the UNI interfaces of the switch on which the physical interface was shut to bring everything back up.

Symptom: The CPU HOG condition might occur while setting up a lot of calls.

Workaround: None.

Symptom: IP host-routing might not disable when specified.

Workaround: Enable and disable ip routing and then save the configuration to NVRAM.

Symptom: Shutting down an interface with more than 1000 tag switching VCs might cause a CPU HOG occurrence for the EXEC process. The CPU HOG occurrence does not impact the functionality of the ATM switch.

Workaround: None.

Symptom: Under some rare conditions (not yet identified), some ports might get stuck in the WaitDevType state.

Workaround: Reboot the switch.

Symptom: The ATM switch does not currently support maxvc-number negotiation through ILMI.

Workaround: None.

Symptom: The following error might occur after copying the running configuration to a TFTP server and then trying to unconfigure all of the interface addresses:

    SYMBOLS:::::::::::::: :/home/aks>/usr/local/bin/rsym ls1010-wp-mz.113-0.8.TWA4.1.21.symbols Reading ls1010-wp-mz.113-0.8.TWA4.1.21.symbols ls1010-wp-mz.113-0.8.TWA4.1.21.symbols read in Enter hex value: 60089678 6008A6D4 6014B518 601731D0 601463F8 60146C0C 6014B68C 6014BA2C 6007EED8 6007EEC4 0x60089678:mgd_timer_complain_uninit(0x6008964c)+0x2c 0x6008A6D4:mgd_timer_stop(0x6008a694)+0x40 0x6014B518:tcp_stoptimer(0x6014b4b4)+0x64 0x601731D0:ipv4_tcp_write(0x60172f00)+0x2d0 0x601463F8:tcp_sendip(0x60146370)+0x88 0x60146C0C:tcp_retransmit(0x60146848)+0x3c4 0x6014B68C:tcp_timeout(0x6014b5c8)+0xc4 0x6014BA2C:tcp_timer(0x6014b9b8)+0x74 0x6007EED8:r4k_process_dispatch(0x6007eec4)+0x14 0x6007EEC4:r4k_process_dispatch(0x6007eec4)+0x0
Workaround: None.

Symptom: If there are multiple parallel paths to the same destination on a LightStream 1010 with a FC-PFQ feature card installed, the tag switching VCs (TVCs) should be load balanced on a per network prefix basis over these parallel paths (up to a maximum of four parallel paths) instead of being VC merged. Load balancing does not happen in some cases and the TVCs might be VC merged and go out of the switch as a single VC.

Workaround: None.

Symptom: The system does not support CUGs on soft PVC connections. For example, if you define a set of access policies and a CUG on an interface with the PVC leg of a soft PVC call, the CUG parameters do not apply to those calls.

Workaround: None.

Symptom: On a LightStream 1010 ATM switch equipped with an FC-PFQ, the maximum number of cells available for use is 64,511. The number of cells in the switch fabric is 65,535.

Workaround: None.

Symptom: When memory is almost or completely exhausted and a soft PVC goes down, it might not come back up, leaving it in a releasing or inactive state.

Workaround: None.

Symptom: The fail over time for the circuit emulation switch (CES) soft VC on a redundant link might be inconsistent, from less than 1 second to up to 15 seconds.

Workaround: None.

Symptom: Cell loss might occur while hot swapping a power supply.

Workaround: None.

Symptom: SNMP support of the ciscoAtmIfPhysEntryData table and LED information is not available on the 25-MB port adapter.

Workaround: None.

Symptom: Supporting ABR VP tunnels requires interaction between VP flow-control and VC marking that neither FC-PCQ nor FC-PFQ hardware can perform. Because of this, the configuration of an ABR VP tunnel subinterface is prevented.

Workaround: None.

Symptom: The cell count reported on a snooped interface is twice the actual number of cells transmitted.

Workaround: None.

Symptom: ATM RMON data collection is not supported on subinterfaces or tunnels. The atm rmon collect command is accepted on hardware interfaces only; it is ignored on subinterfaces. SNMP and NVGEN support (by way of portSelTable) is not possible until the Interfaces MIB (RFC 1573) entries are added for tunnel subinterfaces. ATM RMON counters for a hardware interface do not include any of the traffic through tunnels configured on the interface.

Workaround: None.

Symptom: If you disable Cisco Discovery Protocol (CDP) on the 2/0/0.x interface and it is configured as a LEC, the information is not saved to NVRAM when you enter the copy running-config startup-config command. CDP is disabled in the running configuration, but it is reenabled after a system reload.

Workaround: None.

Symptom: The call attempt counters for PortSelectGroups might not count the outgoing calls on its NNI interfaces because of switch crankback attempts. This might cause a discrepancy between the call attempt counters shown on Portselgroup representing the interface on which the call came in and the counters shown on the Portselgroup representing the interface over which an attempt was made to forward the call. This problem might occur when a call fails.

Workaround: None.

Symptom: When one of the installed power supplies is powered off, and you are copying an image to bootflash, a power supply failure message might appear.

Workaround: None.

Symptom: You can create variable bit rate (VBR), available bit rate (ABR), and unspecified bit rate (UBR) VCs across the switch with peak cell rate (PCR) values greater than the interface line rate. However, the actual allocated bandwidth continues to be:

VBR: sustained cell rate (SCR) + sustained-cell-rate-margin-factor x (PCR - SCR).

ABR, UBR: no bandwidth is allocated.

Workaround: None.

Symptom: A LAN Emulation Configuration Server (LECS), using Cisco IOS Release 11.2(X), expects all LESs to establish an individual control VC to the LECS to validate clients.

If different Emulated Local Area Networks (ELANs), using Cisco IOS Release 11.1(X), are configured on multiple subinterfaces of the same physical interface, then all LESs multiplex the control messages (which validate the clients) into a single VC.

For example, see the following LES router configuration:

    atm1/0.1 sysa_70k_31_a1.1_LAN sysa_70k_31_a1.1_LAN atm1/0.2 sysa_70k_31_a1.2_LAN sysa_70k_31_a1.2_LAN atm1/0.3 sysa_70k_31_a1.3_LAN sysa_70k_31_a1.3_LAN atm1/0.4 sysa_70k_31_a1.4_LAN sysa_70k_31_a1.4_LAN This configuration of a LECS sends the following warning messages to the console stating that a LES of one ELAN is attempting to obtain information about another ELAN: %LANE-4-LECS_WARNING: interface ATM2/0/0: elan 'sysa_70k_31_a1.4_LAN' LES asking for elan 'sysa_70k_31_a1.1_LAN' %LANE-4-LECS_WARNING: interface ATM2/0/0: elan 'sysa_70k_31_a1.4_LAN' LES asking for elan 'sysa_70k_31_a1.2_LAN' %LANE-4-LECS_WARNING: interface ATM2/0/0: elan 'sysa_70k_31_a1.4_LAN' LES asking for elan 'sysa_70k_31_a1.3_LAN'
The clients are still allowed to join the ELAN. Disregard the warning message.

Workaround: None.

Symptom: When a large number of LANE clients come up and down constantly over extended periods of time, the system might run out of AAL5 buffers and the following message appears:

%AAL5-3-INTERNAL_ERROR: No more big aal5 pkts

In most cases, the system continues to function normally, but occasionally the system denies additional calls from end systems.

Workaround: Toggle the interface to reinitialize all connections and restore normal operation.

Symptom: The receiver circuitry on DS3 port adapters might interpret noise as a valid signal. This signal is framed incorrectly and does not contain real data. The DS3 controller interprets the signal as a bad signal instead of no signal, and the red RX LED lights up.

Workaround: None.

Symptom: Under very heavy traffic conditions the switch might experience temporary queue cell failures.

Workaround: This should clear after the traffic congestion clears.

Symptom: When more than 1000 SVCs are active on an interface and the shutdown command is entered, all SVCs on that interface are released and the following message appears:

%SYS-3-CPUHOG

This message indicates that the release process runs for a long time before returning control to the kernel, which might then schedule other tasks. This process does not affect normal operation of the switch.

Workaround: None.

Symptom: E3 port adapters are limited to 65,535 cells per second per PVC regardless of the framing type. There is no benefit from G832 framing.

Workaround: None.

Symptom: When a fault condition occurs on an interface on an intermediate switch, Alarm Indication Signal (AIS) cells are generated. In response, the endpoint sends remote defect identification (RDI) cells. In some cases, these RDI cells are not propagated beyond the intermediate switch. The intermediate switch removes the connection leg entries for both interfaces participating in the connection when the fault is discovered on one of the interfaces, even though the other interface might still be up. As a result, the RDI cells are dropped at the intermediate switch.

Workaround: None.

Related Documentation

The following sections describe documentation available for the LightStream 1010 ATM switch. Both printed manuals and electronic documents are available.

Use these release notes with the documents listed in this section.

Software Documents

Following is a list of the software documentation available for the LightStream 1010 ATM switch:

Hardware Documents

Following is a list of the hardware documentation available for the LightStream 1010 ATM switch:

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.

Obtaining Documentation

The following sections provide sources for obtaining documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following sites:

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

http://www.cisco.com/cgi-bin/order/order_root.pl

http://www.cisco.com/go/subscription

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

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We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.

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The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.

Contacting TAC by Using the Cisco TAC Website

If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:

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P3 and P4 level problems are defined as follows:

In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.

To register for Cisco.com, go to the following website:

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If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:

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Contacting TAC by Telephone

If you have a priority level 1(P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:

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P1 and P2 level problems are defined as follows:





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