I have a question which occurred to me while studying form my BCMSN on route guard.
Assume i had a network similar to the one described in Figure 2 of the Root Guard feature page on Cisco here:-
and deployed root guard on Switch C in the interface connecting to D.
When i switch on D and when D starts to send BPDU's advertising itself as the root, Switch C will block it and put the port into root inconsistent state UNTIL it stops receiving BPDU's on that port.
Am i right in assuming that manual intervention to change the root priority on D is require before any traffic can pass through C?
The article linked seems to indicate it is somehow an automatic process. Does Switch D just give up sending superior BPDU's after a certain time or does it simply sit there claiming to be the root for its own little segment indefinitely?