Re: When plug in BRI module interface, the router 3800 hang.
have you tried to insert the BRI module with the router up and running ?
I wouldn't do so because it isn't supported OIR online insert and removal.
Caution Cisco 3800 series routers do not support online insertion and removal (OIR, or hot swap) of interface cards inserted directly into router slots. You must turn off the router before installing or removing an interface card.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
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