Preview Tool

Cisco Bug: CSCta20486 - SPAN is not working in TX direction for learnt mac address

Last Modified

Feb 22, 2014

Products (1)

  • Cisco 7600 Series Routers

Known Affected Releases


Description (partial)

Packets egressing out of SPAN source port are not replicated on SPAN destination port when the destination address of the egressing packet is already learnt. This issue happens only when Gi | Te x/0/1 (2nd port in ES20 1Gig and 10Gig flavours.) is used as SPAN source port.

Issue is seen when both the conditions are met:
1 .Configuring Gi|Te x/0/1 as SPAN source port
2. 'TestMacNotification'  diagnostic test is enabled on the line card.
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.