IGP choice

Pablo Lucena plucena at coopergeneral.com
Thu Oct 22 22:17:40 UTC 2015

It comes down to personal preference now days in my opinion. Both ISIS and
OSPFv3 allow you to run multi-af using the same protocol. Both of them dont
run full SPF when a stub network is added/removed (unlike OSPFv2). How
about vendor support? Perhaps ISIS has the upper hand here since its been
around for so long, as compared to multi-af OSPFv3.

If I had to build a network from scratch that need to support v4/v6, I
would go with ISIS...but thats just personal preference. Some DC gear
doens't support ISIS, so I guess it depends what the network is going to

BGP as an IGP is also an interesting option =).

*Pablo Lucena*
On Thu, Oct 22, 2015 at 6:07 PM, Baldur Norddahl <baldur.norddahl at gmail.com>

> On 22 October 2015 at 22:57, <sthaug at nethelp.no> wrote:
> > - Needing OSPFv3 for IPv6 when you're alredy running OSPFv2 for IPv4
> > is less than optimal. I believe nowadays several vendors support
> > OSPFv3 for both IPv4 and IPv6 - but this is not universal.
> >
> Our configuration is MPLS VPNv6 for IPv6. Therefore we have no native IPv6
> in the backbone and no need for OSPFv3.
> The IPv4 internet is MPLS VPNv4 so there should be no easy way to attack
> our OSPFv2 instance from outside. The attacker is simply not in the same
> VRF as the routing protocol.
> Is this such an uncommon configuration? I am asking because nobody
> mentioned this in the thread.
> Regards,
> Baldur

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