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Cisco 1700 Series Modular Access Routers

Field Notice: WIC-1SHDSL Flapping When Connected to Alcatel DSLAM


Updated May 19, 2003

March 4, 2002



Products Affected

Product

Comments

Cisco 1700 Series Routers

Must have a WIC-1SHDSL integrated.

Cisco 2600 Series Routers

Must have a WIC-1SHDSL integrated.

Cisco 3600 Series Routers

Must have a WIC-1SHDSL integrated.

Cisco IOS® Software Release 12.2T

?

Problem Description

An interoperability issue with Cisco 1700, 2600, and 3600 series routers containing a WIC-1SHDSL causes line flapping approximately once an hour when connected to an Alcatel DSLAM. The line comes up without any problems within one minute.

The WIC-1SHDSL does not show this behavior when connected to a Cisco DSLAM.

This defect is tracked with Defect IDs CSCdw59420 and CSCdz34758.

Customers are advised to upgrade to Cisco IOS Software Release 12.2(13)T1 or later to avoid this issue.

Background

A catastrophic defect has missed a major maintenance release, Cisco IOS Software Release 12.2(8)T. This Field Notice is written to help communicate the defect to possibly affected users. Other affected releases are listed in the section below entitled Cisco IOS Versions Affected.

Problem Symptoms

Cisco affected platforms with WIC-1SHDSL integrated is sending a %GSHDSL-6-INVALIDADDR: Interface ATM0/0, invalid EOC address message every twenty seconds and about every hour the line goes down and up again after a few seconds:

    00:52:02: %LINK-3-UPDOWN: Interface ATM0/0, changed state to down
    00:52:02: %ATM-5-UPDOWN: Changing VC 8/35 VC-state to PVC deactivated.
    00:52:02: %ATM-5-UPDOWN: Changing VC 8/36 VC-state to PVC deactivated.
    00:52:02: %ATM-5-UPDOWN: Changing VC 8/37 VC-state to PVC deactivated.
    00:52:03: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0, changed state to down
    00:52:36: %GSHDSL-6-INVALIDADDR: Interface ATM0/0, invalid EOC address .
    00:52:36: %GSHDSL-6-INVALIDADDR: Interface ATM0/0, invalid EOC address .
    00:52:40: %ATM-5-UPDOWN: Changing VC 8/35 VC-state to PVC activated.
    00:52:40: %ATM-5-UPDOWN: Changing VC 8/36 VC-state to PVC activated.
    00:52:40: %ATM-5-UPDOWN: Changing VC 8/37 VC-state to PVC activated.
    00:52:42: %LINK-3-UPDOWN: Interface ATM0/0, changed state to up
    00:52:43: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0, changed state to up

Workaround/Solution

Workaround

There is no acceptable workaround. Upgrade to one of the releases listed below to resolve this issue.

Cisco IOS Software Major Release

Cisco IOS Software Maintenance Release

Cisco IOS Software Interim Build

12.2(T)

12.2(13)T1

12.2(13)T1

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCdw59420 (registered customers only)

freq. GSHDSL-6-INVALIDADDR: invalid EOC address, line flaps

CSCdz34758 (registered customers only)

Adding more EOC messages and Fields to interoperate with many DSLAMS

Cisco IOS Versions Affected

Cisco IOS Software Releases Affected by CSCdw59420:

Cisco IOS Software Major Release

Cisco IOS Software Maintenance Release

Cisco IOS Software Interim Build

Cisco IOS Software Image name

12.2T

12.2(4)T

12.2(4)T1

12.2(8)T

12.2(3.x)T through 12.2(8.4)T

c1700-*-mz

c2600-*-mz

c36**-*-mz

Cisco IOS Software Releases Affected by CSCdz34758:

Cisco IOS Software Major Release

Cisco IOS Software Maintenance Release

Cisco IOS Software Interim Build

Cisco IOS Software Image name

12.2T

12.2(4)T through 12.2(13)T

12.2(3.x)T through 12.2(12.13)T

c1700-*-mz

c2600-*-mz

c36**-*-mz

How To Upgrade Software

How to Choose a Cisco IOS Software Release.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods: