[quicwg/base-drafts] Reserve Long Header Packet Type for QUIC-LB (#1980)

Nick Banks <notifications@github.com> Wed, 07 November 2018 15:04 UTC

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Subject: [quicwg/base-drafts] Reserve Long Header Packet Type for QUIC-LB (#1980)
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This issue is directly related to @martinthomson forthcoming changes to the first octet.

The [QUIC-LB](https://github.com/martinduke/draft-duke-quic-load-balancers/blob/master/draft-duke-quic-load-balancers.md) doc uses the QUIC packet framing to communicate between the load balancer and backend servers, because it is the easiest way for the backend server to have built in support. It already has to handle QUIC packets obviously. In order to differentiate QUIC-LB traffic from normal connection flows, QUIC-LB [defines a new QUIC packet type](https://github.com/martinduke/draft-duke-quic-load-balancers/blob/master/draft-duke-quic-load-balancers.md).

If the first octet is changed to only allow for the currently defined packet types in the transport spec, this will cause problems for QUIC-LB. So, we'd like to reserve 1 packet type in the transport spec.

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