From: Yves Fauser (Yves@xxxxxxxxx)
Date: Tue Aug 28 2001 - 09:36:08 GMT-3
Hi Rick,
I did not have the chance to test it in a Lab, but I don't see a <ip
as-path access-list 1> statement in your sample config. When you are
doing :
----------------------------------------------------
route-map set-as-path 10 permit
match as-path 1
set as-path prepend 12345 12345 12345 12345
route-map set-as-path 20 permit
match address 2
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 2 permit 0.0.0.0 255.255.255.255
----------------------------------------------------
I think you wanted to do :
-----------------------------------------------------
route-map set-as-path 10 permit
match ip address 1
set as-path prepend 12345 12345 12345 12345
route-map set-as-path 20 permit
access-list 1 permit 192.168.1.0
-----------------------------------------------------
This should prepend the as-path <12345 12345 12345 12345> to the
192.168.1.0 prefix
Or you could do :
-----------------------------------------------------
ip as-path access-list 1 permit ^$
route-map set-as-path 10 permit
match as-path 1
set as-path prepend 12345 12345 12345 12345
route-map set-as-path 20 permit
------------------------------------------------------
This should prepend the as-path <12345 12345 12345 12345> to all
prefixes that are localy originated by your AS.
hope this helps,
Yves
Rick Stephens wrote:
> Group,
> I have a T1 connection going to one ISP (AS 111), and a second 384K
> connection going to a different ISP (AS 222). We would like to use the
> second connection for backup only. That is, no load sharing rather only to
> be used if the T1 goes down.
> The T1 is out Serial 0/0.1. The backup connection is out a Wireless
> Ethernet. My thought was that simple static routes with adminstrative
> distance would prevent the backup line from being used when going out. But
> the BGP configuration is giving me a little trouble. I thought I could
> prepend the path to the backup connection to make the T1 path to the 1st ISP
> the best route. But, whenever I set this configuration the incoming traffic
> comes in through the 2nd ISP. Where am I going wrong? What is the best way?
> Thank you in advance.
>
> router bgp 12345
> network 192.168.1.0 mask 255.255.255.0
> ! Primary Neighbor (T1 Connection)
> neighbor 172.16.1.1 remote-as 111
> ! Backup Wireless Neighbor (384K Connection)
> neighbor 172.16.10.1 remote-as 222
> neighbor 172.16.10.1 route-map set-as-path out
>
> ip route 0.0.0.0 0.0.0.0 Serial0/0.1
> ip route 0.0.0.0 0.0.0.0 172.16.10.1 100
>
> route-map set-as-path 10 permit
> match as-path 1
> set as-path prepend 12345 12345 12345 12345
>
> route-map set-as-path 20 permit
> match address 2
>
> access-list 1 permit 192.168.1.0 0.0.0.255
> access-list 2 permit 0.0.0.0 255.255.255.255
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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