Re: [isp-bgp] BGP Multihoming tips

[vdadlaney@...]

Hi Praful,

Since you have PA(Provider Assigned) address space you would have to negotiate with one of your providers to advertise the more specific subnet since your address block is most probably part of an aggregate. This would give u backup but if you want to do loadsharing like u have mentioned than u would have to get both your providers to announce the more specific block for your subnet. (Depending on the provider they may do this.) This takes care of inbound loadsharing. As far as outbound loadsharing goes you could ask your ISPs for partial routes for their locally originated prefixes and have default routes configured for prefixes that lie beyond your directly connected ISP's. Apologize if my answer is incorrect and would appreciate it if someone could correct me if i am wrong. Thx
Regards,

Vikram


> Hi All,
> 
> I currently have to setup a network involving BGP
> multihoming to two different ISPs. I have a /24 IP
> space from ISP1 now.I would like to use it for my
> network involving DMZ.I have two Cisco 7200 routers
> which will run IBGP between them and the ISP1
> terminates on R1 and ISP2 on R2 running EBGP. I want
> to have inbound and outbound traffic load shared
> between the ISPs and redundancy when one ISP fails.
> Suggest me some good BGP multihoming tuning tips and
> what do I need to negotiate with my ISPs for better
> reachability of my network in the internet ?
> 
> Since I have the PA ( Provider Assigned)  /24 space
> from ISP1 , how do I go forward with ISP2 to advertise
> it . The two ISPs are peered directly.
> 
> Thank You
> Praful
> 
> 
> 
> 	
> 	
> 		
> ___________________________________________________________ 
> Yahoo! Messenger - want a free and easy way to contact your friends online? 
> http://uk.messenger.yahoo.com
> 




> To unsubscribe via postal mail, please contact us at:
> Jupitermedia Corp.
> Attn: Discussion List Management
> 475 Park Avenue South
> New York, NY 10016
> 
> Please include the email address which you have been contacted with.
> 
> Copyright 2005 Jupitermedia Corporation All Rights Reserved.





To unsubscribe via postal mail, please contact us at:
Jupitermedia Corp.
Attn: Discussion List Management
475 Park Avenue South
New York, NY 10016

Please include the email address which you have been contacted with.

Copyright 2005 Jupitermedia Corporation All Rights Reserved.