From: Stephen Oliver (stevie_oliver@xxxxxxxxxxx)
Date: Sat Feb 16 2002 - 15:32:55 GMT-3
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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