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Re: [Idr] Tunnel-Encap Gaps for SD-WAN described in draft-ietf-rtgwg-net2cloud-gap-analysis-02.txt

Robert Raszuk <robert@raszuk.net> Wed, 26 June 2019 23:09 UTC

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From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 27 Jun 2019 01:09:15 +0200
Message-ID: <CAOj+MME1miW80Ows=L1hx_T4B+596bLmjAeTwvrW0Z5JMY_iKA@mail.gmail.com>
Subject: Re: [Idr] Tunnel-Encap Gaps for SD-WAN described in draft-ietf-rtgwg-net2cloud-gap-analysis-02.txt
To: Linda Dunbar <linda.dunbar@futurewei.com>
Cc: John Scudder <jgs@juniper.net>, John E Drake <jdrake@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
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>
>  I am just curious if all other TLVs/subTLVs of BGP's UPDATEs must be
> present with value NULL (0) to emphasize that it is not accidently omitted?
>

They do not need to be present with NULL (0) value, but no one is drawing
any conclusion on missing attributes. Here you still want to implicitly
take next hops and treat it as tunnel endpoint - as John mentioned that
could be possible if spec would define such behavior when tunnel attribute
is present and Remote Endpoint Sub-TLV is not there. But I am not sure
however if there is sufficient value to it.

[Linda] Isn’t the Source Address of the UPDATE message same as the
> originating node of the UPDATE message?
>

No. Think about going via RRs as a basic example.

Thx,
R.

>

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