[ietf79-tech] default route?

Xiaoliang Zhao xzhao at cernet.edu.cn
Tue Oct 12 21:06:49 PDT 2010


Hi Jim,

In our case, the backup link is connecting to CERNET2, which is a pure IPv6
network. in other words, the backup link has very few ipv4 traffic per
design. Usual TE tricks may not work well here, i'm afraid.

thanks,
Leon

On Wed, Oct 13, 2010 at 11:22 AM, Jim Martin <jim at daedelus.com> wrote:

> Leon,
>        My personal preference is to take full routes from all sources so
> you have maximum control on our side. The usual approach is to allow simple
> best path, taking everything from everyone, and letting the usual BGP rules
> take control. However, you then have the ability to apply LocalPref as a
> knob to make fine adjustments if you need/want to. This works well if a
> particular site is having problems over one link and you want to force it
> out the other. It also allows you to set localpref based upon incoming
> communities, to say, for example, prefer a R&E path over a commodity.
>
>        - Jim
>
> On Oct 12, 2010, at 8:09 PM, Xiaoliang Zhao wrote:
>
> > Hi,
> >
> > We are thinking to get default route from our ISPs with the intention to
> simplify the policy. So the basic idea is we get 0/0 from both primary and
> backup link via bgp, we do local pref to engineer the traffic. Any thoughts
> on potential issues?
> >
> > thanks,
> > Leon
> > _______________________________________________
> > ietf79-tech mailing list
> > ietf79-tech at daedelus.com
> > http://www.daedelus.com/mailman/listinfo/ietf79-tech
>
>
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