Yesterday a bug was discovered in 6.5 around setting up a redundant standby link for a iSCSI binding so you can have multipathing. Typically in the past for iSCSI for non-Enterprise or Enterprise Plus consumers you made two iSCSI vSS switches with two iSCSI Port Groups like ISCSI-A and ISCSI-B, but with a flip of each others nics so that the iSCSI links were always active.
Essentially, say eth0 is 10G and eth 1 is 10G, on iSCSI-A it would be eth0 active and eth1 unused then for ISCSI-B it would be eth0 unused and eth1 active. Well in the Web client there is no way to set a unused link, so how did I do it? …ESX CLI….
1. enable SSH on ESXU host in question
2. access server via SSH with like say putty, login with root login
3. type this command to see your interface in question:
esxcli network vswitch portgroup policy failover get -p [name of vSS’s port group]
4. to move the vmnic you want as unused in that portgroupyou would type:
esxcli network vswitch portgroup policy failover get -p [name of vSS’s port group] -a [vmnic you want as unused]
And that’s it!