3.1.4.3 Processing the Provisional Answer to the Initial Offer

The caller, after receiving the provisional answer with the callee's candidates, MUST begin the connectivity checks as specified in section 3.1.4.8.2. A single initial offer can result in multiple provisional answers being received as a result of forking. The Interactive Connectivity Establishment (ICE) processing MUST be carried out independently for each provisional answer, as specified in [IETFDRAFT-ICENAT-19] section 6.

Implementations of this protocol SHOULD NOT support the processing of more than 20 provisional answers. Implementations of this protocol can support less than 20 provisional answers if the resources are not available to process 20 provisional answers. Provisional answers that arrive after the maximum number of supported provisional answers has been exceeded MUST be ignored.