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Joe - Sorry to resurrect an old thread - I have a very similar issue, I changed the default gateway for a group, but the members keep talking to the old gateway. Equallogic support told me the only supported way to update the GW was to was to reboot the members...
Rebooting the members would take me hours of work, and impact performance more than the problem is causing now...
Any thoughts would be more than welcome
The members do require a controller restart to refresh the changed route (this is akin to a controller failover), and needs to be done for each member. A failover typically only takes 15-30 seconds per member.
Provided that each host iSCSI disk timeout's are setup properly they should "ride out" the failover without issue (to ensure your settings are correct, see the support site, select your version of FW curretly running on your array(s), and you should see a link for "iSCSI Initiator and Operating System Considerations", this document has all OS iSCSI disk timeout values).
Even with that said, I would plan on this during low I/O, or a maintenance period.
Joe - I was hoping you wouldn't say that. Our policy is to make sure there are no connections into a member before performing any work on them. So restarting a member is a big deal.
That said - I'd be more than happy to shut the old gateway for a few minutes during maintenance. that would be much less disruptive. Would the members, upon discovering, that the gateway was no longer existent update their tables?