FC paths down to one node after MetroCluster switchback
Applies to
- ONTAP 9.14.1P9
- FCP
- 4-node MetroCluster
- VMware ESXi 7
Issue
- ESXi hosts have dead paths to LIFs of one node after MetroCluster switchback
- Rescan or reboot of the host does not resolve the situation
- After rescan/reboot the paths go from dead to no longer being shown at the host
- FC ping from ONTAP shows initiator is not reachable from LIF without path:
::> fcp ping-initiator show -wwpn 51:40:2e:c0:12:34:56:78 -vserver svm_example
(vserver fcp ping-initiator show)
Node Logical Ping Extended
Vserver WWPN Name Interface Status Status
--------- ----------------- ---------- --------- ----------- -----------------
svm_example
[...]
51:40:2e:c0:12:34:56:78
node1 lif_fcp01_node1_2c
not-reachable
-
- Storage attached switch can ping storage and host:
fabA_switch2:FID128:admin> fcping 20:10:d0:39:ea:12:34:56 51:40:2e:c0:12:34:56:78
Source: 20:10:d0:39:ea:12:34:56
Destination: 51:40:2e:c0:12:34:56:78
Zone Check: Zoned
Pinging 20:10:d0:39:ea:12:34:56 [0x650b01] with 12 bytes of data:
received reply from 20:10:d0:39:ea:12:34:56: 12 bytes time:489 usec
received reply from 20:10:d0:39:ea:12:34:56: 12 bytes time:355 usec
received reply from 20:10:d0:39:ea:12:34:56: 12 bytes time:358 usec
received reply from 20:10:d0:39:ea:12:34:56: 12 bytes time:338 usec
received reply from 20:10:d0:39:ea:12:34:56: 12 bytes time:377 usec
5 frames sent, 5 frames received, 0 frames rejected, 0 frames timeout
Round-trip min/avg/max = 338/383/489 usec
Pinging 51:40:2e:c0:12:34:56:78 [0x022a00] with 12 bytes of data:
received reply from 51:40:2e:c0:12:34:56:78: 12 bytes time:761 usec
received reply from 51:40:2e:c0:12:34:56:78: 12 bytes time:696 usec
received reply from 51:40:2e:c0:12:34:56:78: 12 bytes time:744 usec
received reply from 51:40:2e:c0:12:34:56:78: 12 bytes time:764 usec
received reply from 51:40:2e:c0:12:34:56:78: 12 bytes time:755 usec
5 frames sent, 5 frames received, 0 frames rejected, 0 frames timeout
Round-trip min/avg/max = 696/744/764 usec
- Host attached switch cannot ping the storage:
fabA_switch1:admin> fcping 20:10:d0:39:ea:12:34:56 51:40:2e:c0:12:34:56:78
fcping: Error source wwn invalid