Re: [quicwg/base-drafts] disable_active_migration with SPA (#3765)

Igor Lubashev <> Mon, 15 June 2020 21:53 UTC

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Date: Mon, 15 Jun 2020 14:53:21 -0700
From: Igor Lubashev <>
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Subject: Re: [quicwg/base-drafts] disable_active_migration with SPA (#3765)
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@ianswett Policy could be one reason.  Technical network topology is a very likely other reason.

Think of Netflix or YouTube or CDN caches deep inside a provider network.  It is not just a matter of policy that things would not work great, if you migrated to a different provider.  This is a very common deployment model on the Internet today.  Pre- #3608 (#3670),  such deployments would work fine.  The new language that exempts SPA from "disable_active_migration" breaks these deployments.

Maybe there is a need to distinguish "disable_network_migration" (original meaning of "disable_active_migration") from "preferred_address_migration_only" (the new concept introduced by #3670).

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