Guest

Preview Tool

Cisco Bug: CSCuq41073 - Sending high rate of DHCP discover packets causes core

Last Modified

Sep 17, 2019

Products (7)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 9504 Switch
  • Cisco Nexus 3164Q Switch
  • Cisco Nexus 9508 Switch
  • Cisco Nexus 93128TX Switch

Known Affected Releases

6.1(2)I2(2b)

Description (partial)

Symptom:
This core is seen when copp policing is increased for DHCP as to not police the pps sent.  50,000 DHCP discover messages are sent to N3164 where it is configured as a dhcp relay.  After around 5 minutes the CPU is low (around 30-40%) and a core is seen which reloads the device.

Conditions:
This core is seen when copp policing is increased for DHCP as to not police the pps sent.  50,000 DHCP discover messages are sent to N3164 where it is configured as a dhcp relay.  After around 5 minutes the CPU is low (around 30-40%) and a core is seen which reloads the device.
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.