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

Last Modified

Feb 26, 2018

Products (10)

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

Related Community Discussions

Nexus 5500 and ASA DHCP Relay not Working
Hi everyone   I'm having a problem with deploying a Nexus 5596 in a costumer's network   We have 2 Nexus 5500, connected, through VPC to a Cisco 5585X which owns the default gateways for all the networks. The Nexus has only a SVI in the VLAN 50 for in-band management    The problem is that, if we connect a user in the VLAN 50 (the same one that is configured for Nexus management) that user doesn't get an IP Address from the DHCP Server located in a different VLAN   Here's a simplified network diagram ...
Latest activity: Dec 01, 2015
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  • Status
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  • Related Community Discussions
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