nanog mailing list archives

Re: Mutual Redistribution


From: Mark Smith <nanog () fa1c52f96c54f7450e1ffb215f29991e nosense org>
Date: Wed, 29 Mar 2006 18:46:49 +1030


On Tue, 28 Mar 2006 16:37:48 -0500
Joe Maimon <jmaimon () ttec com> wrote:



Mark Smith wrote:

One better
solution is to take advantage of route tags or labels. When a route is
redistributed you tag it, and then when mutual redistribution occurs in
the other direction, you exclude routes that have that tag. You'd need
to do this in both redistribution directions, with different tags to
prevent loops in either direction. This method doesn't rely on the
behaviour of always increase metrics, so it would be more robust.

HTH,
Mark.

I dont believe popular vendors implementations of rip propogate tags.

At least the last time I tried loop prevention with that, it didnt work.

Did it happen to be RIPv1 ? Only RIPv2 supports route tags.

-- 

        "Sheep are slow and tasty, and therefore must remain constantly
         alert."
                                   - Bruce Schneier, "Beyond Fear"


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