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Cisco Bug: CSCvs16767 - MFDM core with Policy downgrade from IMR2 to Hplus

Last Modified

Jun 08, 2020

Products (25)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 93120TX Switch
  • Cisco Nexus 93240YC-FX2 Switch
  • Cisco Nexus 93108TC-EX Switch
  • Cisco Nexus 9372TX-E Switch
  • Cisco Nexus 9504 Switch
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Known Affected Releases

14.1(2g) 14.1(2u) 14.1(2x) 15.0(1k)

Description (partial)

The Multicast FIB Distribution (MFDM) process crashes when processing an fmgroup update that comes from the spine switch.

This issue happens when a remote leaf switch in the Remote Leaf Direct mode in the 14.1(2) release receives an unknown type-length-value (TLV) from the spine switch. This situation occurs when Remote Leaf Direct (RLD) is enabled and spine switches are upgraded to the 14.2(2) release, which adds a new TLV in the fmgroup message.
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