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Cisco Bug: CSCvt81574 - N3K/VxLAN - Multicast traffic forwarded back to source port in N3k mode

Last Modified

Jul 17, 2020

Products (65)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 92304QC Switch
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Known Affected Releases

7.0(3)I7(8) 9.3(3)

Description (partial)

Symptom:
Multicast link-local traffic is being sent back to source-port configured to allow VLAN mapped to a vn-segment.

Conditions:
VxLAN Flood and Learn / Ingress replication
Multicast traffic flowing in Vlan mapped to vn-segment
This behavior has been seen for ISIS, OSPF, EIGRP, RIP, HSRP protocols
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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