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3.1.5.21.3 Ice-options attributes

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According to [IETFDRAFT-ICENAT-19], an offer or an answer is allowed to use the ice-options attribute to identify the ICE extensions supported by that agent. If an agent supports an extension, it includes the token that represents that extension in the ice-options attributes.

This protocol does not support the ice-options attribute. It SHOULD NOT<38> generate an SDP message with this attribute and SHOULD ignore this attribute if it is present in the SDP message received.