[c-nsp] MPLS L3VPN Hub and Spoke

Adam Vitkovsky Adam.Vitkovsky at gamma.co.uk
Thu Mar 17 18:11:53 EDT 2016

> Saku Ytti
> Sent: Thursday, March 17, 2016 3:19 PM
> On 17 March 2016 at 16:59, Mark Tinka <mark.tinka at seacom.mu> wrote:
> > Play with RT's.
> >
> > Use an RT on each spoke that imports only the routes from the hub.
> > That RT should not be used for export by any other spoke to the hub.
> This approach relies on no IP lookup at hub PE, if hub PE does IP lookup it'll
> bridge the spokes. I would recommend Charlies's approach and explicitly use
> different VRF for ingress and egress.
> On many platforms it may be hard to reason when IP lookup happens on PE.
And what if you'd advertise just default/summary down to spokes.
And you'd advertise the default with per next-hop/per prefix label.


        Adam Vitkovsky
        IP Engineer

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