We recently had an issue with our SAN switches which had to be replaced, after replacing the switches, we had to change our configuration from the switch being stacked to stand-alone. By doing this, we also had to change our Dell Compellent SAN configuration from 1 Fault Domain to 2 Fault Domains and reconfigure the IP's for the iSCSI adapters that are connecting to Fault Domain 2. The problem that we are having is the Guest OS cannot see the new network that was created and that is causing a problem with reconnecting the iSCSI connections back to the HOST Servers. I was troubleshooting this issue with Dell and they said that the problem is VM related as everything on the SAN is responding correctly.We can ping the IP's from the HOST, from the Switch, but not from the Guest OS. Anyone have any ideas what could blocking this on the Guest OS.
Fault Domain 1 - IP 10.6.0.29, iSCSI 10.6.0.34, 10.6.0.31 - This can be resolved from the Guest OS Fault Domain 2 - IP 10.6.2.29 iSCSI 10.6.2.32, 10.6.2.33 - This cannot be resolved from the Guest OS
MASK is 255.255.252.0 so we can use 10.6.0-10.6.3
iSCSI port on Controller A - 10.6.2.32 can ping 10.6.2.33 and 10.6.2.29 iSCSI port on Controller B - 10.6.2.33 can ping 10.6.2.32 and 10.6.2.29
Switch B - Can ping 10.6.2.29, 10.6.2.32, 10.6.2.33, 10.6.2.48 (this is the iSCSI port on the server)
Problem is on the Guest OS, so unless the Guest OS can ping the 10.6.2 network, nothing on the Fault Domain 2 will work.