Preview Tool

Cisco Bug: CSCta65128 - 1000BaseX autonegotiation compatibility between cat4k and Intel NIC

Last Modified

Mar 04, 2018

Products (1)

  • Cisco Catalyst 4000 Series Switches

Known Affected Releases


Description (partial)


Some ports on Cat 4K might not come up correctly when a peer device - a server with Intel 1000BaseX fiber NIC is reloaded.  This problem is seen with WS-X4448-GB-SFP line card and 
WS-X4516 Sup and 12.2(53)SG, 12.2(31)SGA10 and 12.2(50)SG4 releases.  The link may not come up when you do shut/no shut.  The link may not come up when you OIR cable at the switch port.


1000base-SX Auto-negotiation enabled.
The linecards are one of the following:
The issue is seen only with the E series chassis and not with the Classic chassis.
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.