Preview Tool

Cisco Bug: CSCut42562 - Unicast Traffic dropped as discard drops in ingressq on Standby RP OIR

Last Modified

Jun 08, 2017

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases


Description (partial)

In a 8+2 multichassis setup used for system testing with fabqos configured, there is a 10G snake setup spanning 5 MSC-X line cards. When the standby RP of rack 7 is reloaded(where there are MSC-X cards in rack 7 that has participated in the snake traffic), few discard drops are seen in ingressq of some MSC-X cards.

This issue would be seen with multichassis and single chassis setups which have high volume of traffic, when the standby RP is reloaded or in case of RP failover. It may be that only some RPs in the multichassis may cause this. We have seen the issue with mixed streams of IPv4, IPv6 and MPLS traffic. Also this issue would typically be seen when lot of protocols are enabled in the router.
Bug details contain sensitive information and therefore require a 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.