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Cisco Bug: CSCuo36576 - TOR : Support for learnt routes caching over SVI interface

Last Modified

May 05, 2016

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

6.1(2)I2(1.36)

Description (partial)

Symptom:
Traffic switched from NS ports to T2 ports, can leverage the extra buffer in Northstar ASIC. We support this extra buffer for L2 hosts and L3 hosts connected to Trident ports on TOR.

In case of SVIs interfaces towards Trident ports, this extra buffer functionality is supported for Directly connected Hosts. But this functionality is NOT supported (cant leverage extra buffers) for Routed (Learned or Statically configured) Hosts on SVI interface(with Nexthop as SVI connected host). Please note that there is functional or forwarding issue, just that extra buffers cant be leveraged for such hosts.

Conditions:
This issue is only applicable TOR platforms using NS ASIC: 9396 and 93128. Same functionality works for Direct hosts and hosts learned through OSPF and for Static Routes.
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