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Cisco Bug: CSCut21777 - DHCP Packets flooded to VPC peer with DHCP snooping configuration

Last Modified

Jan 17, 2017

Products (10)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 5672UP Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 56128P Switch
  • Cisco Nexus 5696Q Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

7.0(1)N1(1) 7.0(4)N1(1)

Description (partial)

Symptom:
Nexus 56128P in VPC enabled for DHCP snooping would loop the DHCP packets to VPC peer causing mac-flap on down-stream switches and connectivity issue.

Conditions:
1) VPC
2) Peer-switch
3) DHCP Snooping
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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