From: Steven Weber (itweber@xxxxxxxxxxxxx)
Date: Sat Feb 16 2002 - 23:12:50 GMT-3
Steve,
take a look at Doyle Vol. I page 787. He describes how to use AD to
manipulate routes with mutual redistribution. A technique I used was to make
sure that both redistributing routers have different metrics on them so that
one path is preferred over the other
HTH
Steve
----- Original Message -----
From: "Stephen Oliver" <stevie_oliver@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, February 16, 2002 1:32 PM
Subject: Routing loops.
> Would anyone like to comment on their methods of stopping routing loops
when
> you have multiple mutual redistribution points in your network.
>
> I try to look at what I will be sending out to another protocol and build
an
> access-list permitting these routes. I use this in a route-map with a
> permit to send the routes to another protocol and in another route-map to
> allow them to come back into the protocol they originated from but with a
> higher than default administrative distance. This way if the routes are
> coming back into the protocol the higher AD ensures if they exist already
in
> say ospf they won't be used unless they disappear from OSPF.
>
> So say I send 125.0.0.0 into eigrp from ospf then at the points where I
> redistribute into OSPF I manipulate any occurance of this route to have an
> AD of say 150. If it exists in OSPF the 110 AD is chosen. If it
disappears
> from OSPF and it still comes in via redistribution then it's a valid
> external source and it can still be used with the 150 AD.
>
> Anyone care to comment, criticise or add their opinions.
>
> Stephen
>
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