[76369] in North American Network Operators' Group
Re: Peering best practices advice needed.
daemon@ATHENA.MIT.EDU (Richard Irving)
Wed Dec 8 12:56:58 2004
Date: Wed, 08 Dec 2004 12:56:13 -0500
From: Richard Irving <rirving@antient.org>
To: Rolo Tomassi <rolotomassi32@hotmail.com>
Cc: nanog@merit.edu
In-Reply-To: <BAY17-F259483B1EB2E37F86F5478AEB60@phx.gbl>
Errors-To: owner-nanog-outgoing@merit.edu
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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