[172254] in North American Network Operators' Group
Re: L3/HE/Inbound Pathing Question
daemon@ATHENA.MIT.EDU (Jay Hennigan)
Mon Jun 9 15:09:53 2014
X-Original-To: nanog@nanog.org
Date: Mon, 09 Jun 2014 12:09:39 -0700
From: Jay Hennigan <jay@west.net>
To: nanog@nanog.org
In-Reply-To: <50710E9A7E64454C974049FC998EB65501B23D69@03-exchange.lti.local>
Errors-To: nanog-bounces@nanog.org
On 6/9/14 9:38 AM, Dennis Burgess wrote:
> I have ran into this a few times, and have not found a solution:
>
> L3 à
>
> HEà --- blended Provider A --- > Customer
>
> Cogent -- > Customer
>
> Cogent of course is cheaper, and customer wishes to use the blended provder more as backup and/or have most of the inbound traffic coming in the cheaper path (cogent). The issue appears to be L3 and HE specifically (of course they make up a good chunk of inbound traffic) always prefers their customer peers, so even if we advertise any prefix to the blended, those companies (l3/he) always choose to come in though the customer peer and then to my customer.
>
> Any thoughts on how to get around this, and still have some kind of route in the blended provider for failover? Off list is fine.. Thanks in advance.
Advertise a community to the other providers to localpref your prefixes
down to the point of being a backup.
3356:70 should work for Level 3, you will need to talk to HE and/or your
blended provider for what to use (and whether they support it).
--
--
Jay Hennigan - CCIE #7880 - Network Engineering - jay@impulse.net
Impulse Internet Service - http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV
