Faulty port in Brocade/Broadcom switch

Applies to

• Brocade switches
• ONTAP
• VMWare

Issue

• VMware corruption may occur with flapping switch port causing FC frame drops on target ports.
  • esxcli storage san fc events get
  • tail –f /var/log/vmkernel.log
• ONTAP events indicating instability in the FC conenction
  • event log show -event *fct* -time < 10m
• FC switch port is in an 'Offline' state:

portshow 01
portDisableReason: None
portCFlags: XXX
portFlags: XXXXXX       PRESENT U_PORT DISABLED LED
LocalSwcFlags: XXX
portType:  26.0
POD Port: Port is licensed
portState: 2   Offline
Protocol: FC
portPhys:  5    No_Sync         portScn:   2   Offline
port generation number:   XXXXXX
state transition count:   XXXX

• Link reset errors in the switch logs

2023/11/10-03:06:37 (CST), [XX-XXXX], XXXXXX, CHASSIS | PORT 0/01, WARNING,
BrocadeG620,  Link Reset on PortS0,P01(0) vc_no=2 crd(s)lost=1104 auto trigger.

• When plugging the SFP into a different port, it works as normal
• When plugging a known good SFP into this port, it does not work
• On the switch side, the SFP power range is abnormal:

RX Power:    -2.4    dBm (571.4uW)
TX Power:    -inf    dBm (0.0  uW)