FC-AL LINK_FAILURE alert on all ports attached to same switch in Fabric MCC

• ONTAP9
• Fabric Metrocluster
• Brocade G610

• All node FC initiator ports attached to the same Brocade fabric switch are intermittently reporting link failures at the same time
• Uptime on the affected switch is high (over 900 days)
• The following alerts are seen

[?] Fri Jul 01 21:33:02 -03 [node1: isp2400_intrd: fci.link.break:error]: Link break detected on Fibre Channel adapter 1a.
[?] Fri Jul 01 21:33:02 -03 [node1: lhm_main: callhome.fc.al.link:alert]: Call home for FC-AL LINK_FAILURE (1a)