Re: 1-week WGLC on recent changes in draft-ietf-mmusic-dtls-sdp

On 28 April 2017 at 05:52, Roman Shpount <[email protected]> wrote:
> If ClientHello is not cached, connection setup will be delayed by 5 sec
> (DTLS re-transmit timer). This is quite noticeable and produces negative
> client experience. So, caching or immediate handling is desired. If
> ClientHello is cached, this will work with full ICE and will prevent
> unverified media.

If you are retransmitting ClientHello at 5 seconds, you are going to
have a really bad time.  NSS is a tad aggressive, but our first
retransmit is at 50ms (QUIC recommends 200ms I think).  Even TCP isn't
that slow.  Packet loss happens and 5 seconds is well beyond the point
that users give up.

In general, I agree that caching is going to give better performance.
We can recommend it, but I wouldn't mandate it.