[asterisk-users] Force sip peers to re register

[research at businesstz.com]

I have hundreds of sip endpoints (mostly polycom) which i would like to
immediate request them to reregister when we failover/fallback to the
standby server.

However it takes so long and i would like to know if there is a command to
force all sip peers to attempt registration.

I have tried both 'service asterisk restart' and 'reload' in vain. IP
phones can be accessed at that time but no registration happen.

Sam