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Brocade switch ports flaps and goes automatically disabled

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Category:
fabric-interconnect-and-management-switches
Specialty:
brocade
Last Updated:

 

 

Applies to

  • All Brocade switch hardware platforms
  • All Brocade Fabric Operating System (FOS) firmware levels

Issue

  • Brocade switch port being faulted switch disables the port to prevent flapping
  • Under switchshow, port state shows as "No_sync" or "No_Module"

Example:

errdump -a

WARNING, Brocade Fabric 1, Port 4 Faulted because of many Link Failures.
 
2022/03/17-21:47:29, [MAPS-2030], 1507, SLOT 1 | FID 128, WARNING, NETAPP_FAB1, slot6 port4, F-Port 6/4, Condition=ALL_TARGET_PORTS(STATE_CHG/min>3), Current Value:[STATE_CHG, 4], RuleName=defALL_TARGET_PORTSSTATE_CHG_3, Dashboard Category=Port Health.
2022/03/17-21:47:41, [MAPS-2030], 1508, SLOT 1 | FID 128, WARNING, NETAPP_FAB1, slot6 port4, F-Port 6/4, Condition=ALL_OTHER_F_PORTS(STATE_CHG/min>5), Current Value:[STATE_CHG, 6], RuleName=defALL_OTHER_F_PORTSSTATE_CHG_5, Dashboard Category=Port Health.
2022/03/23-14:25:14, [MAPS-2030], 1571, SLOT 1 | FID 128, WARNING, NETAPP_FAB1, slot6 port4, F-Port 6/4, Condition=ALL_TARGET_PORTS(STATE_CHG/min>3), Current Value:[STATE_CHG, 4], RuleName=defALL_TARGET_PORTSSTATE_CHG_3, Dashboard Category=Port Health.
2022/03/23-15:42:50, [MAPS-2030], 1581, SLOT 1 | FID 128, WARNING, NETAPP_FAB1, slot6 port4, F-Port 6/4, Condition=ALL_TARGET_PORTS(STATE_CHG/min>3), Current Value:[STATE_CHG, 4], RuleName=defALL_TARGET_PORTSSTATE_CHG_3, Dashboard Category=Port Health.
 
switchshow

64  4   4   150400   --   N32     No_Module   FC  Disabled

140 3 28 668c40 id N32 No_Sync FC Disabled

  • sfpshow indicates Tx is extremely low than the recommended one

sfpshow -all

RX Power:    -2.1    dBm (623.1uW)
TX Power:    -6.2    dBm (237.3 uW)

  • sfpshow indicatesRx & Tx are in optimal range

RX Power:    -1.9    dBm (652.9uW) 
TX Power:    -0.3    dBm (939.5 uW)

 

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