Preview Tool

Cisco Bug: CSCtd25882 - Dot1q vlan subinterface forwarding ip frames in promiscuous mode

Last Modified

Feb 02, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)


Heavy traffic load due to ping pong of packets (with decrementing ttl) between router configured for dlsw transparent. This will only appear on the native vlan.

Dlsw transparent configured on router pair, with sub-interfaces and IP connectivity on the native vlan and a steady stream of unanswered IP packets (eg: a unicast UDP stream).
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.