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Set the QUIC bit in Version Negotiation #2561

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Apr 23, 2019
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Set the QUIC bit in Version Negotiation #2561

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5 changes: 4 additions & 1 deletion draft-ietf-quic-transport.md
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Expand Up @@ -3497,7 +3497,10 @@ The layout of a Version Negotiation packet is:
~~~
{: #version-negotiation-format title="Version Negotiation Packet"}

The value in the Unused field is selected randomly by the server.
The value in the Unused field is selected randomly by the server. Clients MUST
ignore the value of this field. Servers SHOULD set the most significant bit of
this field (0x40) to 1 so that Version Negotiation packets appear to have the
Fixed Bit field.

The Version field of a Version Negotiation packet MUST be set to 0x00000000.

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