I'm new at this, but feeling good after my class last week. Wouldn't it be
more appropriate to ask the first provider to advertise the specific subnet
in addition to the aggregate? In other words, if the provider is
aggregating, in compliance with best practice on the net, the only choices
are to ask the provider NOT to aggregate AT ALL, or ask him to advertise
your specific subnet in addition to the aggregate.
I was just reading something like this in Halabi. Using the suppress-map
feature?
( quick look in the book - yes, there it is, page 354 )
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Daniel Ji
Sent: Friday, September 15, 2000 12:13 PM
To: [EMAIL PROTECTED]
Subject: Re: BGP question - Multihoming
ask your provider1 NOT to aggregate your /23 block, instead advertise it
alone, AND put more AS # in your updates to provider2 so as to make the
route(AS_path) longer for them to reach you.
hope help.
Dan.
""Martin-Guy Richard"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I have a tricky version for you guys:
>
> I am multihomed to two provider. I got a /23 from Provider1. I
> announce my /23 two Provider1 and Provider2. Since my /23 comes from
> Provider1, he is supposed to aggregate in in is /16 CIDR. But, I have
> to announce my /23 to my other provider. Somebody told me that the
> longest prefix becomes something of a traffic magnet (or something like
> that). So, all of my traffic would come from Provider2 and not
> Provider1. How is it so, since BGP use aggregation?
>
> I don't understand!
>
> MGR
>
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