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

["Christer Holmberg \(JO/LMF\)" <christer.holmberg at ericsson.com>]

>  > IMHO-- we should be flexible in this regard. Make sur, there is no way for the proxy to get the UA to 
> open such 
> >> connection or for the proxy itself open such a TCP 
> connection towards 
> >> the UA via the NAT when a large message arrives destined 
> to the UA. 
> >> So if the UA does not keep the TCP connection open all the 
> time, it 
> >> has to live with the limitation of not being able to receive SIP 
> >> requests bigger than MTU if the NAT discards fragmented 
> UDP packets.
> >>
> >> P.S. Actually there is such a mechanism for that specified in Marc 
> >> Petit-Huguenin's I-D "Preventing Fragmentation for Client 
> Initiated 
> >> Connections in the Session Initiation Protocol (SIP)" - 
> but that is 
> >> not within the baseline Outbound spec and there is no normative 
> >> binding between those specs either.
> >>
> >> Regards,
> >>
> >> Erkki
> >
> >
> 
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> 

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