Guest

Cisco 2800 Series Integrated Services Routers

Field Notice: PVDM2-8 Can Cause an Unexpected Reload of the Host Router


October 01, 2004


Products Affected

Product

Comments

NM-HDV2

N/A

NM-HDV2-1T1/E1

N/A

NM-HDV2-1T1/E1=

N/A

NM-HDV2-2T1/E1

N/A

NM-HDV2-2T1/E1=

N/A

NM-HDV2=

N/A

PVDM

PVDM2-8 / PDVM2-8=

Problem Description

Cisco has determined that the PVDM2-8 can cause an unexpected reload of the host router when used in Flex Complexity mode with any other PVDM2 module in a NM-HDV2 module or on a PVDM slot on the motherboard of a Cisco 2800 or Cisco 3800 Series routers.

This failure does not occur when:

  • If any combination of PVDM2-16, PVDM2-32, PVDM2-48 and/or PVDM2-64 modules are used.

  • The host router is only configured with one PVDM2-8 module.

  • When High or Medium codec complexity is selected for Voice-over-IP calls and the feature Hairpinning ( DSP local-bypass) is enabled.

    Note:?Hairpinning is enabled by default

Background

This defect is caused by an incorrect handling of PVDM2-8's initialization in Flex Complexity mode in the IOS code.

Problem Symptoms

Cisco has determined that the PVDM2-8 can cause an unexpected reload of the host router when used in Flex Complexity mode with any other PVDM2 module in a NM-HDV2 module or on a PVDM slot on the motherboard of a Cisco 2800 or Cisco 3800 Series routers.

Workaround/Solution

To alleviate this problem and protect the network from an occurrence prior to the availability of the Cisco IOS releases that include the fix to this issue, customers are recommended to use either of the following workarounds:

For the Cisco 2801 router:

The likelihood of experiencing this issue may be dramatically decreased by using a PVDM2-8 module only in PVDM slot 1, with or without any other PVDM2 modules (PVDM2-16, PVDM2-32, PVDM2-48, PVDM2-64) present.

For Cisco 2800, 3800 series and Cisco HDV2 Network Modules:

The exposure to a potential failure may be eliminated by configuring the codec complexity to Medium instead of Flex for Voice-over-IP calls. For example: Router(config-voicecard)# codec complexity medium and to not disable the feature hairpinning which is enabled by default. For example Router(config-voicecard)# local-bypass(default) for POTs-to-POTs calls.

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

CSCef52639 (registered customers only)

Voice gateway reloads when running Flex complexity calls with PVDM2-8

How To Upgrade Software

Cisco Feature Navigator II:

Cisco Feature Navigator is a web-based application that allows you to quickly find the right Cisco IOS Software release for the features you want to run on your Network.

Cisco Feature Navigator II

Cisco IOS Planner:

The Cisco IOS Planner allows you more flexibility to browse for your preferred software. You can view all major releases, all platforms, and all software features from a single interface. Choosing a platform, a maintenance release, or software feature will automatically limit the other menu choices based on your selection, until you arrive at your preferred software.

Cisco IOS Software Selector

Software Migration Recommendation

Customers are advised to upgrade to the respective Cisco IOS software releases as suggested:

Products

First Cisco IOS Release that includes the Fix

Target Date for IOS Release Availability

Cisco 2800 Series Integrated Services Routers

12.3(8)T5

October 25, 2004

Cisco 2800 Series Integrated Services Routers

12.3(11)T1

November 22, 2004

Cisco 3800 Series Integrated Services Routers

12.3(11)T1

November 22, 2004

Cisco NM-HDV2, NM-HDV2-1T1/E1 or NM-HDV2-2T1/E1

12.3(8)T5

October 25, 2004

Cisco NM-HDV2, NM-HDV2-1T1/E1 or NM-HDV2-2T1/E1

12.3(7)T5,12.3(11)T1

November 22, 2004

Affected IOS Versions

Products Affected

Cisco IOS Release

Cisco 2800 Series Integrated Services Routers

12.3(8)T4 , 12.3(11)T

Cisco 3800 Series Integrated Services Routers

12.3(11)T

Cisco Network Modules NM-HDV2, NM-HDV2-1T1/E1 and NM-HDV2-2T1/E1

12.3(7)T, 12.3(7)T1, 12.3(7)T2, 12.3(7)T3, 12.3(7)T4, 12.3(8)T, 12.3(8)T1, 12.3(8)T2, 12.3(8)T3, 12.3(8)T4, 12.3(11)T

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:

Receive Email Notification For New Field Notices

Product Alert Tool - Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.