I am running CUCM ver 6.1.1. We had an incoming hurricane last Thursday. In preparation, we decided to shut down the
publisher server since the building where it resides is prone to power issues.
Our CUCM enviornment consists of a pub and two subs. All phones / device pools use the
same call manager group. In this call manager group, the servers are listed in this
order: Sub1, Sub2, Pub.
When we shut the pub down, registered phones continued to operate normally, but if a phone
or site lost connectivity, it would fail to register.
If we brought the pub back on line, the phone / site would register again.
I contacted TAC and as a work around, we removed the pub from the call manager
group, then reset all devices. This worked for the mean time, but I need to find out why
this did not work automatically, without having to take the pub out of the ccm group. Any ideas as to why this did not work as designed?