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7100-Series : SFP+ port may fail to forward traffic after link state changes with 8.42.xx fimware

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Title7100-Series : SFP+ port may fail to forward traffic after link state changes with 8.42.xx fimware
Symptoms
  • After causing link flaps by removing or moving a link on a port or between ports the switch may get into a state where zero packets are transmitted.
  • Port counters all increment ok 
  • Port status all looks ok
Environment
  • 7100 Series
  • SFP+
  • Firmware 8.42.xx track
Cause
When a SFP is inserted into a 10G port on a 7100K-Series unit during runtime and 1G link is subsequently established with a peer, an error condition may occasionally be seen in which packets are not properly transmitted on the port.  A reboot is required to restore proper operation on the port.  The issue is not seen on ports that have been connected prior to boot.
Resolution
Upgrade to 8.42.04
Additional notes

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