Re: [Idr] Question about draft-haas-flowspec-capability-bits-02

[Jeffrey Haas <[e-mail]>]

Linda,

On Mon, Jun 21, 2021 at 08:39:14PM +0000, Linda Dunbar wrote:
> Section 2 of the draft-haas-flowspec-capability-bits-02 shows the example of 13 bits representing the capacity.
> When the Nth bit is set to 1, does it represent Type N component is supported?

Correct.

> What if more types are proposed later? RFC8956 has Type 14-255 as reserved. I'd assume future drafts can propose more types. Does it mean the Capability value has to be expanded to 255 bits?

It means the protocol needs a serious rewrite.

The component types 14-255 are reserved, but that was partially because
there was no way to incrementally deploy new features.  Addressing that
potentially before a flowspec v2 protocol was a motivation for this draft.

> A nit: the second paragraph of the Section 1 says that "The components are documented in the Section 3 of RFC8955". But the components are actually specified in the Section 4. Do I miss something?

Thanks for bringing that to my attention.  That's a lingering issue from
changing from RFC 5575 where it was in section 3.  If I update the draft
I'll correct it next round.

-- Jeff