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List:       sip-implementors
Subject:    RE: [Sip-implementors] Questions of large request message
From:       "Brett Tate" <brett () broadsoft ! com>
Date:       2005-02-22 23:01:52
Message-ID: 001601c51932$7f8096c0$a601a8c0 () brett1
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> I have some questions about handling 
> SIP msgs that are larger than 1300 bytes. 
> RFC 3261, chapter 18 as listed, mentions 
> that if request message is larger than 
> 1300 bytes, it MUST be sent using TCP 
> because of the meesage size constraints. 
> But what should the proxy do when user 
> registers to Proxy/Registrar with 
> "transport=udp" or without "transport" 
> parameter??

If I understand RFC3261 section 18.1.1 correctly,
the decision to send over UDP has already been
made.  This section provides an additional
mechanism to try using TCP towards the
ip-address and port chosen for UDP.

If someone thinks message size is part of
the RFC3263's NAPTR and SRV process, please 
indicate where it is documented.



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