Egress Realm Precedence for SIP OPTIONS and Normal Requests
Hi,
I'm posting this info here as I've seen this question several times from different customers before.
When we have one Session-Agent that belongs to multiple realms, i.e. is a Global Session-Agent that can be reached via multiple realms, the realm-id of this SA definition is '*'.
Customers report that once the realm-id is changed to * the SIP OPTIONS requests stopped being sent out towards the SA.
When your Session-Agent is global, the parameter egress-realm-id should be configured indicating to the SD what's the realm that should be used to send out the SIP OPTIONS requests used to monitor the availability of the Session-Agent.