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Cisco Bug: CSCvs31374 - Spine-BGW - BUM traffic dropped with VNI's sharing same mcast group between local and stretched VNIs

Last Modified

Oct 06, 2020

Products (65)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3132Q-V Switch
  • Cisco Nexus 92304QC Switch
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Known Affected Releases

9.3(2) 9.3(3)

Description (partial)

As of now set of VNIs sharing same multicast group has to be either configured together or removed together from a BGW on spine.

Symptom:
BUM traffic drop on spine for VLAN not configured for BGW on spine. You will only see this issue for the VLAN using the same mcast group.

Conditions:
VXLAN EVPN multisite with BGW on SPINE scenario and using same multicast for multiple vni. if BGW on spine is configured with only some of vni on the BGW on spine, BUM traffic will be dropped for the vni not created on BGW.
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Bug Details Include

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