[c-nsp] BGP and Multihome question.

[Michael Smith]

In short, yes.  Almost all providers filter on a /24, so even if you're
primary provider rolled up your /27 into a less-specific announcement, your
second provider would still need to accept it and forward it on as a /27.

You might consider getting a /24 from either your new or old provider, or
perhaps a second link to your existing provider given that it terminates on
different equipment on their end.  I know that's not truly redundant, but
every little bit helps.

Mike
-- 
Michael K. Smith   
Senior Network and Systems Engineer     NoaNet
(206) 963-3679                          mksmith at noanet.net
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> From: Joseph Jackson <JJackson at nos.com>
> Date: Sun, 15 May 2005 19:23:09 -0700
> To: <cisco-nsp at puck.nether.net>
> Subject: [c-nsp] BGP and Multihome question.
> 
> Hey all,
> 
>  
> 
>             We currently have one pipe to the internet; we are getting a
> second pipe for redundancy if the main link fails.  We would like to do BGP
> so that if the main link were to fail our customers can still access our
> websites, email, etc.
> 
> My question is this.  We have 2 /27 from our provider that we use for our
> internet facing eq since they are /27's are other providers going to ignore
> or BGP announces and thus defeat the entire point of having a multihomed
> setup?
> 
>  
> 
>  
> 
> Thanks
> 
>  
> 
>  
> 
> Joseph Jackson
> 
>  
> 
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