From: Alejandro Cadarso (a.cadarso@xxxxxxxxxxxxxx)
Date: Mon Aug 28 2000 - 05:11:43 GMT-3
Hi all:
I have not clear the difference between:
1.- bgp always-compare-med
2.- bgp bestpath med-confed
in the cisco Documentationn says:
"The comparison between MEDs is only made if there are no external ASes
in the path (an external AS is an AS that is not within
the confederation). If there is an external AS in the path, then the external M
ED is passed transparently through the
confederation, and the comparison is not made."
path= 65000 65004, med=2
path= 65001 65004, med=3
path= 65002 65004, med=4
path= 65003 1, med=1
In this case, path 1 would be chosen if bgp bestpath med-confed is enabled. The
fourth path has a lower MED, but it is not
involved in the MED comparison because there is an external AS in this path.
2.1. Anybody knows why the path that has an external AS in his path is not invo
lved in the MED comparison?
2.2. what about the comparison about the shortest AS PATH?, I thought it was pr
evious to the MED comparison.
2.3. Is The behaviour different if we also have the command bgp always-compare
-med in our conf.?
3.- bgp deterministic med
in the cisco Documentationn says:
Alejandro
"Note If bgp always-compare-med is enabled, all paths are fully compara
ble, including those from other ASes in the confederation,
even if bgp deterministic med is also enabled."
3.1. What about paths with external ASs in their paths?
3.2. If I have
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