[126508] in North American Network Operators' Group

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Re: useful bgp example

daemon@ATHENA.MIT.EDU (Jared Mauch)
Wed May 19 14:29:37 2010

From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <B3520B5286C55F4480D8E43FDFE51D0F2195735B@mailman2.faps.net>
Date: Wed, 19 May 2010 14:29:21 -0400
To: "Jeff Harper" <jharper@first-american.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org


On May 19, 2010, at 2:26 PM, Jeff Harper wrote:

>> -----Original Message-----
>> From: Deric Kwok [mailto:deric.kwok2000@gmail.com]
>> Sent: Monday, May 17, 2010 6:15 PM
>> To: nanog@nanog.org
>> Subject: useful bgp example
>>=20
>> Hi
>>=20
>> My company will get 2 upstream provider. We will plan 2 routers and
>> each router to connect one provider to use bgp for redundant.
>> Do you have any useful bgp example and website to set it up?
>>=20
>> Thank you for your help
>=20
> This jpg should help, has config on it as well.
>=20
> Jeff
> <bgp1.jpg>

Nice, but you don't show it as-path filtering your transits out.  I =
frequently see people take something learned from transit A and sending =
it to transit B, and if it happens to be the backup path in-use for your =
customer, your transits will accept it and likely pick you as best-path =
and hairpin through your network.

- Jared



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