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Cisco Bug: CSCvj10097 - N9K - TAP-AGG Po Member Update (Up/Down) Honored By All Modules Incorrectly

Last Modified

May 24, 2019

Products (50)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 9396TX Switch
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Known Affected Releases

7.0(3)I7(3)

Description (partial)

Symptom:
This bug tracks two different problems. 

1. Traffic loss in NDB setup on Modular 9500 when one of the member ports of a 100gig Port-channel go down.

2. When Switch is configured for TAP Aggregation, and Traffic is being redirected to a specific Port-channel, it is quite possible that the same traffic can be directed to another port-channel which belongs to a different module within the chassis and the port numbers of the interfaces bundled in port-channels on these two different modules are the same. Ie. If traffic for ethernet 1/1 is being redirected to Port-Channel 12 for which the member interface belongs to Module 2 and interface being e2/11 then traffic might also get redirected to interface e3/11 which is member of another Port-Channel 14 which is configured on Module 3 ports.

Conditions:
1. Seen when using 100G link bundled into port-channels and one link is down

2. Seen only when traffic is being redirected to member ports which belong to similar numbered interfaces on different modules. So far the Issue is seen with Nexus 9732C-FX and 9736C-FX Series based line cards.
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