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Cisco Bug: CSCvt55138 - Sup-redt traffic flow drop with TTAG header on top of VXLAN header.

Last Modified

Aug 19, 2020

Products (65)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 3132Q-V Switch
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Known Affected Releases


Description (partial)


Server =>(encap)TOR2 ==>Spine ==> TOR1(decap)?CPU

Server sending ICMP packets to TOR1 loopback address. Packets come to TOR1 with TTAG, getting dropped by TOR1 netstack and is not visible in ethanlyzer.

TTAG configured on downlink port of Encaped vtep.
Affecting only CloudScale based Cisco N9K switches
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