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Cisco Bug: CSCvs12744 - RL_IMR2_L4L7 - Consumer to prov traffic dropped(ACL_DROP) on FW1-Internal service tor with sup_hit

Last Modified

Aug 28, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

14.2(2.216)

Description (partial)

Symptom:
with application of service graphs and service devices also behind Remote Tors ( remote Leaf),  if the service chaining involves multiple redirections involving Remote Tors, then traffic can get black holed. End to end traffic will not work.

Conditions:
with application of service graphs and service devices also behind Remote Tors ( remote Leaf),  when the service chaining involves multiple redirections involving Remote Tors

 Ex:   LL ----RL1---- RL2------ RL3 ------LL
                   FW1    FW2      FW3
In the above example RL1,RL2,RL3 are Remote Tors ( remote leaf), service chaning involves multiple RL's and redirection from one RL to another RL and if destnation EP is not resolved on these Tors, we will see blackholing of traffic.

If RL3 is the only remote Tor and service device behind it, we will not see the problem
 
 Ex:   LL ----RL1 ------LL
                   FW       
In the above example if RL1 is a Remote Tor, we will not see any issue
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