Re: [spring] WGLC - draft-ietf-spring-srv6-network-programming

Sander Steffann <> Thu, 12 March 2020 12:55 UTC

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From: Sander Steffann <>
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Date: Thu, 12 Mar 2020 13:55:46 +0100
Cc: Andrew Alston <>, "Pablo Camarillo (pcamaril)" <>, "" <>, 6man WG <>
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To: "Ketan Talaulikar (ketant)" <>
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Subject: Re: [spring] WGLC - draft-ietf-spring-srv6-network-programming
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> So what is it that you and Andrew see in the net-pgm draft or the SRv6 proposal that lead you to believe such a change in the IPv6 assignment or allocation sizes are required by RIRs?

Well, your example mentions that a /40 is used for SRv6 in a very large setup. A regular business entity has a /48 and a regular ISP will have a /29 available. I think it is necessary to look at what an expected address space requirements for SRv6 will be for such entities, and whether that fits and leaves enough remaining address space for the rest of the network.

What is also necessary is to see if the way SRv6 uses addresses is compatible with the RIR policies. In the RIPE NCC region we have, which basically allows for a separate /48 per PoP and a single /48 for in-house operation of the operator. If changes are required in RIR policies their communities need to be told so, and mutual expectations of what will and will not be considered acceptable address space use will have to be discussed.

> I am assuming this is the same "IP Space burn" topic that Andrew alludes to …