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

Last Modified

Jan 29, 2017

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.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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