[c-nsp] iChat AV and Cisco CBAC/NAT

[Rodney Dunn]

Send me any SR # where you have opened with TAC where you
can prove we are non-RFC compliant and that SR was closed without
a good explanation of why it was fixed.

I'll follow up on it with the TAC engineer.

Rodney

On Fri, Mar 16, 2007 at 04:24:05PM +1100, Reuben Farrelly wrote:
> 
> 
> On 16/03/2007 5:58 AM, Jared Mauch wrote:
> > On Thu, Mar 15, 2007 at 09:35:51AM -0700, matthew zeier wrote:
> > 	Cisco doesn't actually care about SIP though from what I
> > can tell as some of their devices (eg: 7970) don't handle SIP
> > messages properly.  I don't think they test with anything but their
> > own internal suites which appear to be buggy.  I was able to crash
> > some older sip phones in the past by sending them a well formatted
> > and innocious options message in the past.
> 
> Based on what I have seen, I would tend to agree with that, unfortunately.  I 
> have a 7941 phone and I have attempted on a number of occasions to alert cisco 
> via TAC cases and directly contacting people who work with cisco VoIP to some 
> issues of non SIP RFC compliance with the SIP stack on the phone itself, and I 
> get absolutely nowhere every time.  I've nearly given up, so I'm still stuck on 
> the very oldest code for these units (8.0.2SR1a) because it's the only code 
> which actually is reasonably RFC compliant and works, despite the fact that it 
> has security holes and is missing some new features.
> 
> The router SIP inspection code is generally pretty good.  When it works it works 
> very well and I'd recommend it, but random T releases tend to totally break it 
> such that things like inbound calls don't happen, I think the idea is to wait 
> for the next rebuild because usually it gets fixed again soon after... or just 
> change releases or stick to mainline until you find one that works (most of the 
> mainline code is good).
> 
> Reuben
> 
> (Some concerns and bugs with the code are documented at 
> http://www.voip-info.org/wiki/view/Asterisk+phone+cisco+79x1+xml+configuration+files+for+SIP 
> - I imagine VoIP people at cisco haven't seen this page)
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