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RE: on-link and off-link

Vasilenko Eduard <vasilenko.eduard@huawei.com> Mon, 12 July 2021 15:35 UTC

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From: Vasilenko Eduard <vasilenko.eduard@huawei.com>
To: Philip Homburg <pch-ipv6-ietf-7@u-1.phicoh.com>, "ipv6@ietf.org" <ipv6@ietf.org>
CC: Alexandre Petrescu <alexandre.petrescu@gmail.com>
Subject: RE: on-link and off-link
Thread-Topic: on-link and off-link
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Date: Mon, 12 Jul 2021 15:34:57 +0000
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NBMA or P2MP are not supported by IPv6 anyway because it is not possible to check LLA uniqueness - multicast does not work.
LLA proxy is needed on the hub site.
Ed/
-----Original Message-----
From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Philip Homburg
Sent: Monday, July 12, 2021 6:20 PM
To: ipv6@ietf.org
Cc: Alexandre Petrescu <alexandre.petrescu@gmail.com>
Subject: Re: on-link and off-link 

> I think one question
> might be: do we agree that each IP address is assigned on an 
> interface, and thus is on-link on a particular link?

This is not correct. On a NBMA link it is possible that all GUA addresses are not on-link.

The conceptual model of on-link is that a host can use neighbor discovery to find an onlink neighbor. If the neighbor is not on-link then traffic has to go (at least initially) through a default router.

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