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Cisco Bug: CSCun26418 - OTV encapsulation fails for multicast/broadcast traffic

Last Modified

Feb 03, 2017

Products (8)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases

6.2(6)

Description (partial)

Symptom:
The replication ASIC responsible for SPAN, OTV encapsulation, and multicast replication stops replicating all traffic.  As a result, each of the above features will also fail.  This is particular to the SPAN/multicast replication pipeline so customer in an OTV environment will see that multicast traffic (including link-local multicast 224.0.0.0/24), along with broadcast traffic are not forwarded across the overlay.

Conditions:
This has been observed in OTV environment with a high rate of traffic egressing the OTV join-interface with ERSPAN configured to span the join-interface, which is very rare.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
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