From: Chua, Parry (Parry.Chua@xxxxxxxxxx)
Date: Fri Mar 15 2002 - 06:16:15 GMT-3
One of the possible condition is that assume there are several neigh's connect
via ethernet or it happen to be the common path.You may want to control some ro
ute that to or from all neigh. This may allow you to do other control on per n
eigh by making use of neigh x.x.x.x.x.
> Parry Chua
>
>
-----Original Message-----
From: Bhisham Bajaj [mailto:bhishambajaj@yahoo.com]
Sent: Friday, March 15, 2002 3:57 PM
To: ccielab@groupstudy.com
Subject: Bgp the diffrent ways to do a thing
Bgp has a lot of ways to get what u want
But I want to understand what is the internal
difference by using the different ways
Neighbor x.x.x.x advertise-map
Neighbor x.x.x.x unsupress-map
Neighbor x.x.x.x route-map
Neighbor x.x.x.x filter-list
Neighbor x.x.x.x prefix-list
Neighbor x.x.x.x distribution-list
Distribution-list ( x ) (in/out) (type/num)
aggregate-address x.x.x.x y.y.y.y advertise-map
aggregate-address x.x.x.x y.y.y.y suppress-map
aggregate-address x.x.x.x y.y.y.y route-map
summary-address x.x.x.x y.y.y.y
all this command do some think different
and I am out to get a few ans
let me start with the distribution-list
distribution-list may be the best way to filter routes
based on the network number
BGP is a routing protocol based on TCP session. U have
to define static neighbor on both the routers to get a
BGP peer up . now if we want to filter what route go
to a neighbor or can come from a neighbor we can use a
lot of methods one would me to apply a
distribution-list to the neighbor command . this way
we can control what routes cant be learned from that
neighbor or what routes can go to that neighbor this
way we can filter routes based on network address
This is ok but I want to understand what is the use of
the command distribution-list 1 ( in/out ) eth 0
Under bgp with rip it makes a lot of use as we filter
based on inter but in bgp my neighbor can have
multiple routes by multiple interface so where and why
would I need to use a bgp route filter based on what
interface the route comes in or goes out
BB
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