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ISL Trunk port disabled

Last Updated:

Applies to

  • Fabric-attached MetroCluster
  • ONTAP 9
  • Brocade switches


  • One of the ISL ports is disabled.


> switchshow
Index Port Address  Media Speed   State       Proto
  20  20   071400   id    8G 	  Online      FC  LS E-Port  (Trunk master)  
  21  21   071500   id    8G 	  No_Sync     FC  LS Disabled (Trunk port not ready)
  • Errors are also displayed on the node:


Node1::*> system health alert show

               Node: Node2
           Resource: Brocade_switch
           Severity: Major
    Indication Time: Mon Jul 19 14:20:35 2021
           Suppress: false
        Acknowledge: false
     Probable Cause: All ISL links on Brocade_switch are down.
    Possible Effect: Backend fabric might lose ISL redundancy.
 Corrective Actions: 1) Repair the backend fabric ISLs on Brocade_switch.
                     2) Ensure that the peered cluster is up and running by
                        using the command "cluster peer ping".

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