From: Richard Irving <[email protected]>
To: Rolo Tomassi <[email protected]>
CC: [email protected]
Subject: Re: Peering best practices advice needed.
Date: Wed, 08 Dec 2004 12:56:13 -0500
Rolo Tomassi wrote:
Hi all,
Please forgive the simplistic nature of the query..
Basically my company is multi-homed with 2 different providers in the UK,
and advertising a /18. Now some colleaguges in another part of the world
want to break that /18 into two /19's and advertise one /19 and we
advertise the other. This is fine, however we are NOT running IBGP in the
core, therefore the UK customers in the /19 will not be able to reach the
other /19 as there would be a loop detected through EBGP.
Pardon my simplistic solution, try dropping the /18, and -only-
advertise the corresponding /19 from each region.
Now someone mentioned that we could use AS-LOOP-IN feature which will
overcome this problem and allow us to route to each other via EBGP. I
really think this is a bad idea but until we get an internal link - I dont
see a way forward. So... anyone doing this currently in their network or
have any "best practices" way round this. I want our company to be good
Netizens but still be able to pass traffic between the 2 /19's.
See above. K.I.S.S. (No offense intended ;)
Any help would be greatly appreciated.
Rolo !
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