> > I have used local_pref to influence the path
> > selected for outbound traffic. It worked well.
>
> Local-pref is used often, but blows away as-path, so you'll make the
> wrong decision for people who use outbound as padding to deselect backup-
> transit paths, or t1s vs. t3s, or worse-quality providers vs. beter.
You have an excellent point.
The application of local-pref that I described doesn't fall
victim to this. All we're trying to do here is to prefer
one path over another, but not exclusively so.
Setting local-pref on *just* the paths *of* one provider
works fine.
route-map prefer-just-provider-B-routes 10
match as-path 1
set local-pref 110
route-map prefer-just-provider-B-routes 20
match everything else
ip as-path access-list 1 permit ^(_AS-B)+$
how's that go? keep things as simple as possible, but
no simpler
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