Whenever I introduce a new Cisco phone onto the network within about 2 hours (variable time - can be minutes or over an hour later) my 7800N becomes unresponsive over the Ethernet interface. Connectivity to the router is lost.
Wireless devices still work fine. The lights on the front of the router look like indicating lots of network activity.
To try to resolve this I ran WireShark and indeed have found the issue:
The switch is producing (many 10s of times a second) the following:
Code: Select all
180 2016-11-14 22:40:28.063430 Spanning-tree-(for-bridges)_01 Spanning-tree-(for-bridges)_01 MAC CTRL 60 Pause: pause_time: 65535 quanta
181 2016-11-14 22:40:28.096977 Spanning-tree-(for-bridges)_01 Spanning-tree-(for-bridges)_01 MAC CTRL 60 Pause: pause_time: 65535 quanta
182 2016-11-14 22:40:28.130495 Spanning-tree-(for-bridges)_01 Spanning-tree-(for-bridges)_01 MAC CTRL 60 Pause: pause_time: 65535 quanta
This ONLY happens when a new Cisco phone is introduced to the network. It happens once per phone, and after that does not happen again.
I have had 100+ day up-time on the router without issue, but once a new phone is added I can guarantee this will happen.
Rebooting the router via power off - on is the only way to restore service.
I have replicated this exact behavior on my second Billion 7800N, so it is not a "one off" thing.
Any ideas welcome.
Thanks
Marcus