I'm having a strange issue with my CUCM 6.1 cluster. We have 3 x SIP trunks going to another cluster (ie. one trunk to each node). Whenever I point a route pattern down a single trunk, it works fine (on all of the trunks) but as soon as I put one or all of the trunks into a route group then route list and point the route pattern down the new route list, it doesn't work.
Note that it was working earlier - we have recently added a new subscriber.
Any help would be much appreciated!