Cisco WAN Switching Modules

Field Notice: Interfaces on RPM-PR Back Cards Should Be Shut Down Before Removal

October 10, 2001

Products Affected




Problem Description

In rare instances, removing one of the Route Processor Module (RPM)-PR or RPM/B back cards may cause the RPM-PR or RPM/B to reset and disrupt user traffic through the RPM-PR or RPM/B.


The RPM-PR and RPM/B can accommodate a pair of back cards, one in the upper bay and one in the lower bay. The two cards may be MGX-RJ45-FEs, or MGX-RJ45-4E/Bs, or one of each. Removing one of the back cards can cause the RPM-PR or RPM/B to reset, causing traffic through the remaining back card to be interrupted for a short period.

Problem Symptoms

The RPM-PR or RPM/B resets and come back into operation. The event log will record this event. The RPM-PR or RPM/B will also log these events. Traffic through the reset RPM-PR and RPM/B will be interrupted temporarily while reboot occurs.


Shut down the Ethernet or Fast Ethernet interfaces on the MGX-RJ45-4E/B or MGX-RJ45-FE that needs to be removed before you remove the card. Below is an example of the command sequence used to shut down a Fast Ethernet port.

RPM-PR-13#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
RPM-PR-13(config)#interface FastEthernet0/0
00:04:38: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administt

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:

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