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Cisco Bug: CSCte58479 - Cat4948 -Duplex mismatch may cause complete loss of traffic under SPAN

Last Modified

Jan 27, 2017

Products (1)

  • Cisco Catalyst 4000 Series Switches

Known Affected Releases


Description (partial)


The problem is observed as a complete loss of traffic on a monitorred port of a Cat4948 running 122-25.EWA14. Upon duplex mismatch the Catalyst 4948 doesn't log a warning or preferrably puts the mismatched port into error disabled state. 


The scenario involves a local SPAN and duplex mismatch on the monitored port. Upon duplex mismatch the monitorred port will cease passing traffic completely without going into errored or any other state state.
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