Extra line of requirement text for section 4.2 on registrations:
When the UAC includes a 'reg-id' parameter in a Contact, it MUST include the
same parameter and value in refreshes and deregistrations for that Contact.
(could be combined with the remark on re-registrations at the end, the
latter should also mention de-registrations)
This is needed in (or at least greatly simplifies) a deployment where the
registrar is separate from the edge proxy, in which case the registrar may
not be able to determine which flow is being refreshed / deregistered (e.g.
when TCP connections between the edge proxies and the registrar got
recycled)
You may want to say a few words on the processing of refreshes and
deregistrations in section 6, as the matching of bindings is now different
from RFC3261 (it now includes the instance-id & reg-id)
Regards,
Jeroen
[EMAIL PROTECTED] wrote:
A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Session Initiation Protocol Working
Group of the IETF.
Title : Managing Client Initiated Connections in the Session
Initiation Protocol (SIP) Author(s) : C. Jennings, R. Mahy
Filename : draft-ietf-sip-outbound-10.txt
Pages : 42
Date : 2007-7-12
The Session Initiation Protocol (SIP) allows proxy servers to
initiate TCP connections and send asynchronous UDP datagrams to
User Agents in order to deliver requests. However, many practical
considerations, such as the existence of firewalls and Network
Address Translators (NATs), prevent servers from connecting to
User Agents in this way. This specification defines behaviors
for User Agents, registrars and proxy servers that allow requests
to be delivered on existing connections established by the User
Agent. It also defines keep alive behaviors needed to keep NAT
bindings open and specifies the usage of multiple connections.
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