netdev - Re: [PATCH net-next 00/10] VRF-lite

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Message-Id: <20150813.224521.867973376420345543.davem@davemloft.net>
Date:	Thu, 13 Aug 2015 22:45:21 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	dsa@...ulusnetworks.com
Cc:	netdev@...r.kernel.org, shm@...ulusnetworks.com,
	roopa@...ulusnetworks.com, gospo@...ulusnetworks.com,
	jtoppins@...ulusnetworks.com, nikolay@...ulusnetworks.com,
	ddutt@...ulusnetworks.com, hannes@...essinduktion.org,
	nicolas.dichtel@...nd.com, stephen@...workplumber.org,
	hadi@...atatu.com, ebiederm@...ssion.com, svaidya@...cade.com
Subject: Re: [PATCH net-next 00/10] VRF-lite - v6

From: David Ahern <dsa@...ulusnetworks.com>
Date: Thu, 13 Aug 2015 14:58:59 -0600

> In the context of internet scale routing a requirement that always comes
> up is the need to partition the available routing tables into disjoint
> routing planes. A specific use case is the multi-tenancy problem where
> each tenant has their own unique routing tables and in the very least
> need different default gateways.
> 
> This patch allows the ability to create virtual router domains (aka VRFs
> (VRF-lite to be specific) in the linux packet forwarding stack. The main
> observation is that through the use of rules and socket binding to interfaces,
> all the facilities that we need are already present in the infrastructure. What
> is missing is a handle that identifies a routing domain and can be used to
> gather applicable rules/tables and uniqify neighbor selection. The scheme used
> needs to preserves the notions of ECMP, and general routing principles.

Series applied, however...

I don't think the ipv6 dependency should be there until you actually add
ipv6 support to VRF-Lite.

Furthermore, when you do, you need to make it so that people can enable
VRF even if they don't turn ipv6 on.

Thanks.
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