From: Keegan.Holley@sungard.com
Date: Sun Mar 09 2008 - 21:35:06 ARST
Hello all,
On page 336 - 337 of the JNCIS study guide it describes the portion of the
BGP route selection process pertaining to MED and then attempts to
describe the behavior of a cisco systems router in making the same
decision. The examples used are a little confusing. They use the same
three routes in both examples two coming from the same AS with differing
MED values and another coming from a different AS. With the Juniper method
the router choose the iBGP route with a lower MED. With the cisco method
the router chooses the eBGP route because eBGP is preferred. However, the
eBGP route is only preferred by the cisco router because of administrative
distance. The next decision in the path selection process of both vendors
is eBGP over iBGP, so Juniper router would have chosen the eBGP route as
well. My question is what is the difference between the cisco and juniper
treatment of MED?
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