[SIPForum-discussion] Registrar forcer re-registration

[Tyler Parkin]

Good evening,

I'm curious to know if there is a SIP method for a registrar to force (an early) re-registration. 

Our network is pretty standard:

SIP UA -> SBC -> REGISTRAR

In an effort to minimize the effects of an outage event, identifying a solution for SIP -> PSTN calls is easy.  However, PSTN to SIP calls is more difficult unless the registration cache in both the SBC and the Registrar/feature server are updated (due to endpoint IP NAT'ing).  To date, our only solution has been to re-register the UA's, either via a SIP method (preferred) or a script that logs into each UA and tears down the endpoint and rebuilds it.

In reading the RFC's, I've been unable to find a SIP method that will force a UA to re-register prior to reaching the normal expires value and thought I'd bounce it off the community.

Thanks,

Tyler

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