Guest

Preview Tool

Cisco Bug: CSCvv27817 - DHCP Unicast Packets wrongfully snooped / punted to CPU on FX

Last Modified

Sep 26, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

13.2(9e)

Description (partial)

Symptom:
DHCP unicast renewal acks are NOT forwarded across the fabric to clients. (this traffic is sourced from port 67 destined to port 68)
Regular DORA works well, unicast ACKs are working as expect . (this traffic is sourced from port 67 destined to port 67)
 
For the DHCP renewals, we observe that they are incorrectly being punted to CPU as ISTACK_SUP_CODE_DHCP_SNOOP on the ingress leaf.

Conditions:
Unicast renewals forwarded from AVE to FX leaf, destined to port 68
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.