Brian West wrote:
> What is the valid way to express both IP4 and IP6 in the SDP letting  
> the remote side pick the one its capable of?

See S13 of mmusic-ice-15
(http://tools.ietf.org/html/draft-ietf-mmusic-ice-15#section-13)
for using multiple candidate attributes (c.f.
http://tools.ietf.org/html/draft-ietf-mmusic-ice-15#section-15.1).

For good measure, you may also want to scan SIP/IPv6 transition
draft (http://tools.ietf.org/html/draft-ietf-sipping-v6-transition-04),
although we will be updating it shortly to reflect the dicsussions
on ICE vs. ANAT at the Prague IETF.

- vijay
-- 
Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent
2701 Lucent Lane, Rm. 9F-546, Lisle, Illinois 60532 (USA)
Email: [EMAIL PROTECTED],bell-labs.com,acm.org}
WWW:   http://www.alcatel-lucent.com/bell-labs

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