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MetroCluster brocade switch isl port down
https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/MetroCluster_brocade_switch_isl_port_down
Applies to Fabric MetroCluster ONTAP 9 Brocade FC switches Issue A Brocade switch ISL port is down. sfpshow on SFPs at both ends of the connection shows low RX power.

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