Remind me do the SW-ER-7.1-7845-K9 licenses get hosted one to pub and one to sub mac address? I’m still not clear on that and I have another install next week. You can't even login to CERAdmin on Subscriber to install a license, it just give a URL link to Publisher.
Is there a URL that explains failover licensing with CER?
Do both servers need the same number of KEY-ER7.X-XXX= ? Even if one is a subscriber and do subscriber licenses use subscriber mac, etc?
CER will only allow you to log into the active server. If your CER publisher is active, you won't be able to log into the subscriber.
Don't confuse the logon server with the server you tried to take action on.
For example, you may log onto a CUCM publisher and start/stop the services on subscriber. You don't have to log onto the CM subscriber to do that.
Same for the CER, you don't have to log onto the sub to license the sub. All you need to do is to choose sub from the drop-down menu when you upload the license. Of course, that license should have sub's MAC address.
Hope this helps.