[isp-bgp] RE: Sample BGP Config

["Carl-Henrik Landgren" <landgren@...]

Depending on what link you want the traffic to take, it's pretty simple....

Just make the link you don't want the outbound traffic to pass with a
longer AS-PATH, just add your own AS to the AS-SEQUENCE several times to
make it long enough.

Or, you can filter with LOCAL-PREF for the prefixes you want the
outbound-traffic to exit your AS.

The rest i assume you know how to configure yourself.

/Carl



------- Ursprungligt brev -------
Från: chris@...
Datum: Tue, 15 Jul 2003 14:58:48 -0700

Michael,

Thanks for the response.  The example I read was "Load Sharing when
Multihomed to Two ISPs via Multiple Local Routers"

The outbound traffic policy in this example limits traffic to one of the
two providers unless there is a failure.

The outbound traffic policy is as follows: 
Traffic destined to AS 300 goes via the R1 - ISP(A) link. 
Traffic destined to AS 400 goes via the R2 - ISP(B) link. 
All other traffic should prefer default route 0.0.0.0 via the R1 -
ISP(A) link. 
If the R1 - ISP(A) link fails, all traffic should go via the R2 - ISP(B)
link. 

I'd like to have outbound traffic take the shortest path if both ISP's
are up and fail over to the other ISP if one ISP link fails.


Christopher J. Wolff, VP CIO
Broadband Laboratories, Inc.
http://www.bblabs.com 

-----Original Message-----
From: Michael Weinstock [mailto:MWeinstock@...Sent: Tuesday, July 15, 2003 2:50 PM
To: isp-bgp@isp-bgp.com
Subject: [isp-bgp] RE: Sample BGP Config

Hello,

You didnt like it? Perhaps specify what you didnt like... As the answer
will be based on Cisco's docs.

-----Original Message-----
From: Christopher J. Wolff [mailto:chris@...Sent: Wednesday, 16 July 2003 9:47 a.m.
To: isp-bgp@isp-bgp.com
Subject: [isp-bgp] Sample BGP Config


Hello,

I'm looking for a couple of sample cisco configs that illustrate two
multihomed routers connected by an IGP session.  For example;

Router 1----------Isp 1
|
|
IGP
|
|
Router 2----------Isp 2

I read the Cisco scenarios for multihomed networks documents but I
didn't like what I read.  Thank you in advance.

C.J. Wolff, VP CIO
Broadband Laboratories, Inc.
http://www.bblabs.com 




_______________ 

 ______________





_______________ 

 ______________