CID size in IETF QUIC

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Chuck Crisler

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Jan 21, 2021, 7:34:41 PM1/21/21
to QUIC Prototype Protocol Discussion group
I am designing a feature in our product to track and report QUIC traffic through our network device. I looked into the IETF invariant spec and it seemed that the connection IDs could be up to 255 bytes. Did I read that correctly? If I am correct, what is the rationale and use case for such a size?

Thank you,
Chuck

David Schinazi

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Jan 21, 2021, 7:48:49 PM1/21/21
to QUIC Prototype Protocol Discussion group
The QUIC invariants allow CIDs up to 255 bytes, but QUIC version 1 only allows lengths up to 20.

David

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Chuck Crisler

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Jan 22, 2021, 8:19:41 AM1/22/21
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Thank you. I obviously haven't been paying close enough attention to QUIC development. What is 'QUIC version 1'?

David Schinazi

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Jan 22, 2021, 5:31:36 PM1/22/21
to Chuck Crisler, QUIC Prototype Protocol Discussion group
QUIC Invariants are the properties of QUIC that will apply to all versions of QUIC, they aren't an actual protocol that one can use:
QUIC version 1 is the actual protocol that we'll be deploying:

David
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