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|Affected OS Type
||Affected Release Number
||N7K/5.2(1) Adding a new vlan reloads M1-series linecards|
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:
Please note that this is a software caveat (CSCtt43115) and this is not a hardware issue on the M1-Series modules.
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.
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])
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
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:
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