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Cisco Bug: CSCtc55866 - C2960-48PST: display of speed/duplex remains 1000/full after unplug SFP

Last Modified

Feb 22, 2014

Products (104)

  • Cisco Catalyst 2960 Series Switches
  • Cisco Catalyst 3750V2-24PS Switch
  • Cisco Catalyst 2960-24-S Switch
  • Cisco ME 3400-24TS-A Switch
  • Cisco Catalyst 2960-24TC-L Switch
  • Cisco Catalyst 3750G-12S Switch
  • Cisco ME 3400EG-2CS-A Switch
  • Cisco Catalyst 3560G-48PS Switch
  • Cisco Catalyst 3560E-48PD-E Switch
  • Cisco Catalyst 3560E-48PD-SF Switch
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Known Affected Releases

12.2(52)SE

Description (partial)

Symptom:
C2960-48PST: display of speed/duplex remains 1000/full after unplug SFP

Conditions:
In 12.2(46)SE, when SFP is unplugged from a SFP port, the display of
speed/duplex in show int command returns to 'Auto-duplex, Auto-speed'.
But 12.2(50)SE or later releases, it remains 'Full-duplex, 1000Mb/s'.


(12.2(46)SE (after SFP is unplugged))
WS-C2960-48PST-L#sh int g0/1 status
Port      Name               Status       Vlan       Duplex  Speed Type
Gi0/1                        notconnect   1            auto   auto Not Present

WS-C2960-48PST-L#sh int g0/1 | i media
  Auto-duplex, Auto-speed, link type is auto, media type is Not Present


(12.2(50)SE or later (after SFP is unpluggd))
WS-C2960-48PST-L#sh int g0/1 status
Port      Name               Status       Vlan       Duplex  Speed Type
Gi0/1                        notconnect   1            full   1000 Not Present

WS-C2960-48PST-L#sh int g0/1 | i media
  Full-duplex, 1000Mb/s, link type is auto, media type is Not Present
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