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LAG Does not Form Between Switches

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TitleLAG Does not Form Between Switches
Symptoms
• Show port status shows port up and not dormant
show port status
tg.4.7 to_lag.0.5 up up 10g-lr lc
  • LACP Switch sending but not receiving LACP PDUs
show port lacp port tg.4.7 counters
Port Instance: tg.4.7
LACPDUsRx: 0 MarkerPDUsRx: 0
LACPDUsTx: 14141 MarkerPDUsTx: 0
IllegalRx: 0 MarkerResponsePDUsRx: 0
UnknownRx: 0 MarkerResponsePDUsTx: 0
ActorSyncTransitionCount: 0 PartnerSyncTransitionCount: 0
ActorChangeCount: 6 PartnerChangeCount: 0
ActorChurnCount: 0 PartnerChurnCount: 0
ActorChurnState: ChurnMonitor PartnerChurnState: noChurn
MuxState: detached
MuxReason: BEGIN = TRUE
in-
Environment
  • S-Series
  • Dell S4048
Cause
Dell was using SR Multimode fiber and the Extreme switch was using long range transceivers
Resolution
Change the transceivers on one of the switches so they both use the same media
Additional notes

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