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Set to an arbitrary value
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martinthomson committed Jan 14, 2021
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10 changes: 5 additions & 5 deletions draft-ietf-quic-transport.md
Expand Up @@ -4665,11 +4665,11 @@ Version Negotiation Packet {
~~~
{: #version-negotiation-format title="Version Negotiation Packet"}

The value in the Unused field is selected randomly by the server. Clients MUST
ignore the value of this field. Where QUIC might be multiplexed with other
protocols (see {{?RFC7983}}), 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 value in the Unused field is set to an arbitrary value by the server.
Clients MUST ignore the value of this field. Where QUIC might be multiplexed
with other protocols (see {{?RFC7983}}), 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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