Re: draft-kuthan-sip-derive
Hadriel Kaplan <[email protected]>
| Newsgroups | gmane.ietf.sip |
|---|---|
| Message-ID | <E6C2E8958BA59A4FB960963D475F7AC3136C6897E9@mail> |
> -----Original Message----- > From: Adam Roach [mailto:[email protected]] > Sent: Monday, November 17, 2008 10:24 AM > > On 11/17/08 9:17 AM, Dean Willis wrote: > > What IS important is that we understand that no such feature can be > > made to work with an SBC that is actively disrupting it. > > And that's my point. Hadriel stood up and effectively said "SBCs break > everything. If you want identity to work, you need to find something > that SBCs don't break." Actually, I'm pretty sure I said *B2BUA's* change the Call-ID and tags, and that there were far more than just SBCs. Honestly, most every box I see traces from appears to be a b2bua of some form or other these days. (of course that's probably because of the types of networks my product's in to begin with, so it's a myopic view I know) Some of these b2bua's change the call-id+tags, some don't. > My understanding of set theory is somewhat rudimentary, but I am fairly > certain that the inverse of the universe is the null set, and that the > intersection of the null set and anything else will always be the null > set. > So, unless you can point out the flaw in that logic, then the only > progress we can make is by ignoring SBCs and hope they catch up. The set of the universe is not germane to the issue at hand. Many B2BUA's change call-id+tags; that says nothing about whether they change other things. And it says nothing about their motivation for the changes. SBC's cannot "catch up" to not change call-id's - it's what their owners want them to do. Speaking as just one vendor, we don't change call-id's and tags by *default*. Virtually EVERYONE changes that default behavior and configures us to change the call-id and tags as soon as they install the system. That doesn't mean they will change anything no matter what - they have specific motivation for changing the call-id. The IETF SIP WG gave them that motivation, by putting an IP Address in it. That was a mistake. It was a big mistake. -hadriel _______________________________________________ Sip mailing list https://www.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