Re: [Sidrops] I-D Action: draft-ietf-sidrops-aspa-profile-15.txt

["Sriram, Kotikalapudi (Fed)" <[e-mail]>]

Hi Claudio,

[top comments only]

>...
>If something like this is included it needs to be clear that ASPA only applies to unicast IPv4 and IPv6 (AFI 1 & 2, SAFI = 1).
>...

Yes, I didn't mean to leave out the SAFI. 

>In my opinion the ASPA verification draft is already fairly clear about this:
> ... snip...

True, but the following part is new and may be needed for clarity: "In rare cases, if a CAS considers some Provider ASes to be unique to one address family, it MUST still list the union of all Provider ASes applicable to {AFI 1 (IPv4), SAFI 1} and {AFI 2 (IPv6), SAFI 1}  in the SPAS."

Or, it can be stated more simply as: "The CAS MUST list the union of all Provider ASes applicable to {AFI 1 (IPv4), SAFI 1} and {AFI 2 (IPv6), SAFI 1}  in the SPAS."

(Note: Statement about including non-transparent RS in the SPAS already exists in the verification draft. We'll not lose track of that.)

Sriram
--------------------------


-----Original Message-----
From: Claudio Jeker <[e-mail]> 
Sent: Friday, June 9, 2023 12:42 PM
To: Sriram, Kotikalapudi (Fed) <[e-mail]>
Cc: Job Snijders <[e-mail]>; [e-mail]; [e-mail]
Subject: Re: [Sidrops] I-D Action: draft-ietf-sidrops-aspa-profile-15.txt

On Fri, Jun 09, 2023 at 02:55:15PM +0000, Sriram, Kotikalapudi (Fed) wrote:
> Hi Job and all,
> 
> Do we need a statement in the profile document to make it clear what 
> AFIs the ASPA profile specification applies to? Should we make it 
> clear that it does not apply to AFIs other than 1 and 2?
> 
> Suggestion for the wording:
> 
> ---
> The specification of the ASPA profile in this document is applicable only to address families IPv4 (AFI = 1) and IPv6 (AFI = 2). The Set of Provider ASes (SPAS) listed in the ASPA is considered applicable to both AFI = 1 and AFI =2. In rare cases, if a CAS considers some transit providers to be unique to one address family, it MUST still list the union of all transit providers applicable to AFI = 1 and AFI =2 in the SPAS.
> ---
> 
> An alternative is to say nothing about the AFI in the profile document 
> (as currently the case with v-15). Instead, state the above (with 
> somewhat different wording) only in the ASPA verification document?

If something like this is included it needs to be clear that ASPA only applies to unicast IPv4 and IPv6 (AFI 1 & 2, SAFI = 1).
In my opinion the ASPA verification draft is already fairly clear about
this:

 1. Introduction
    The procedures described in this document are applicable only for BGP
    routes with {AFI, SAFI} combinations {AFI 1 (IPv4), SAFI 1} and {AFI 2
    (IPv6), SAFI 1} [IANA-AF]. SAFI 1 represents NLRI used for unicast
    forwarding [IANA-SAF].

 7. AS_PATH Verification Recommendations
    The procedures described in this document MUST be applied to BGP routes
    with {AFI, SAFI} combinations {AFI 1 (IPv4), SAFI 1} and {AFI 2 (IPv6),
    SAFI 1} [IANA-AF]. The procedures MUST NOT be applied to other address
    families by default.

So in my opinion there is no need to complicate the ASPA profile document.

--
:wq Claudio