3.1.5.21 Deviation from ICE V19
ICE, as specified in [IETFDRAFT-ICENAT-19] , is a methodology to let media traverse NAT and firewalls to reach the remote peer. Support of ICE in this protocol differs from that specified in that document. The following subsections describe deviations from the standard ICE specification.
A user agent SHOULD<35> support this version of ICE based on [IETFDRAFT-ICENAT-19].