What's your MTU over the backup VPN? I've seen odd issues on some networks with different providers and MTU and fragmenting packets always caused issues until the MSS was set.
I'm not sure why this would affect the 8851's, but we've noticed some other oddities with the 8851's. For instance, computers with intel nic's behind the phone have issues after we apply config, and we narrowed it down to intel gigabit master slave mode setting on the driver, at least, setting that to slave instead of auto resolves the problem. Otherwise, you have to reboot the phone a couple of times to get consistent connection through the 8851. Phones are connected to a 2960 with a basic config, nothing out of the ordinary. On Thu, Apr 23, 2015 at 6:35 PM, Jonathan Charles <jonv...@gmail.com> wrote: > We have CUCM 8.6.2 with Cisco 8851, Cisco 8831 phones at a remote location; > they are connected over MPLS and a Peplink Balance VPN as a backup. > > When we yank the MPLS, the 8831 registers with CUCM and works fine.... the > 8851s do NOT. > > Any reason the 8851 would act differently? > > > > > Jonathan > > _______________________________________________ > cisco-voip mailing list > cisco-voip@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-voip > _______________________________________________ cisco-voip mailing list cisco-voip@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-voip
