Re: [Sip] Question about Poll: Proposal relating to keepalive, TCP, and UDP usage in draft-ietf-sip-outbound

[Dean Willis <dean.willis at softarmor.com>]

Cullen Jennings wrote:

> Hmm - I wish we had better specifics here - I will point out there  are 
> millions of endpoints on well known residential endpoints that  are 
> working through NATs and connected to PSTN gw and softwswiches  that are 
> working over UDP.
...
> Could you point me at a non enterprise deployment that is not in  point 
> 2? I suspect there are some but the bulk seem to be form 2.

The problem is that none of those deployments are (yet) using the 
boatload of features like identity, e2m, complex route-header cookies, 
and other Very Important Stuff that we think might be likely to happen. 
But when that stuff starts to happen, UDP fragmentation will start to 
occur. We don't yet know how much will break as a result. But my guess 
is "a lot".

How about we rip out UDP, fix the Outbound stuff, fix the 
route-construction stuff, fix the early-media stuff. and call it SIP 3.0?

--
Dean


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