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Cisco Bug: CSCvv72527 - Port-channel gets added as a SPAN destination in monitor session for EX/FX based LC in EOR

Last Modified

Oct 12, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

9.3(5)

Description (partial)

Symptom:
So basically there is a limitation, FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with -EX or -FX line cards.

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/system-management/b-cisco-nexus-9000-series-nx-os-system-management-configuration-guide-93x/b-cisco-nexus-9000-series-nx-os-system-management-configuration-guide-93x_chapter_011011.html
 
However, when you configure the interface first with "switchport monitor" and then put it in a channel-group the config is getting imported from the interface to the port-channel and allowing it in the SPAN destination port EX based LC.
This needs to be blocked.

Conditions:
When you have "switchport monitor" configured first in the interface and then add it into the channel-group. The monitor session then allow the port-channel as the destination of SPAN.
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