From: "Attila Sipos" <[EMAIL PROTECTED]> Are namespaces just a way to group together different users across different DNS domains?
What if a.com is using namespaces "dsn-000000" to "dsn-000009" and b.com is using the same namespaces? Then if [EMAIL PROTECTED] calls [EMAIL PROTECTED], wouldn't the namespaces interfere? What looks after or checks the namespaces? Is it that a proxy knows what everyone's namespace should be? So if someone wants to do "UA Preemption" and tries to use a resource priority level higher than they should have, then will the domain's proxy downgrade it back to the correct permitted level? The primary thing is that resource-priority namespaces are registered with IANA (RFC 4412, section 3.1). Within any administrative domain, if it processes resource-priorities at all, it will generally sanitize any incoming SIP messages to match the policy of the domain. As a default, this means that it is going to strip any resource-priority identification. Above that, it may respect resource-priority identification if the domain has a suitable working relationsip with the terminal or domain from which the message is entering -- but that relationship will explicitly or implicitly define how the resource-priority identifications will be preserved or transformed at the boundary. This is pretty much how *any* priority-identification system has to be operated. Dale _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
