Field Notice: FN - 63495 - NX-OS 5.2(1) - Nexus 7000 M1-Series Modules May Reset or Link State Across Multiple Ports May Flap After Configuring a New VLAN with SPAN - Workaround Provided

Notice

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Revision History

Products Affected

Defect Information

Problem Description

For Cisco Nexus 7000 series switches running NX-OS 5.2(1), M1-series modules may reset or link state across multiple ports may flap after configuring a new VLAN with SPAN. A full list of all M1-series modules is provided below:

N7K-M148GT-11=

N7K-M132XP-12=

N7K-M148GS-11=

N7K-M148GS-11L=

N7K-M108X2-12L=

N7K-M132XP-12L=

N7K-M148GT-11L=

Please note that this is a software caveat (CSCtt43115) and this is not a hardware issue on the M1-Series modules.

Background

This issue only occurs on Cisco Nexus 7000 series switches running NX-OS 5.2(1) when a TX SPAN session is configured with the destination port as a trunk port. The SPAN destination port could be in either an M1 or F1 module.

Problem Symptom

The following error messages may be seen when the issue occurs:

%MODULE-2-MOD_DIAG_FAIL: Module X (serial: ) reported failure on ports X/1-X/48 (Ethernet) due to Octopus internal error in device 78  (device error [ErrCode])

Workaround/Solution

There are two methods to workaround this issue:

1) Remove all the monitor sessions, configure VLAN(s) and restore all monitor session configurations.

2) Configure the SPAN destination port as an access port instead of a trunk port.

Either of the above options should be repeated every time a new VLAN needs to be configured.

This issue is applicable only to the NX-OS 5.2(1) release. This issue is NOT applicable to pre-5.2 releases or 5.2(3a) and later.

Additional Workaround Information:

If the affected Nexus 7000 module(s) are powered down after a few reloads, then follow the steps mentioned below to recover the modules (relevant CLI commands are provided):

1) Remove the newly added VLAN

2) Remove the monitor session(s)

N7K-CORE(config)#no monitor session 1

3) Manually reload the M1 module(s) from the default VDC

N7K#reload module [mod#]

4) Once the modules are up, add new VLANs

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:

• Open a service request on Cisco.com
• By email
• By telephone

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