Olle E. Johansson writes:
The idea is that a client has two open connections and two registrations from the same device. The registrations has the same UUID in the contact, but different reg-id's. When an edge proxy returns 430 when the registrar uses one reg-id contact, the registrar needs to retry with the other reg-id.
i just checked rfc5626 and in my opinion it has big flaw in that even if an ua is configured with two ob proxies, rfc5626 does not require that ua registers via both of them. rfc5626 thus just brings more complexity without any benefit for implementing proxy redundancy.
-- juha