[172265] in North American Network Operators' Group
RE: L3/HE/Inbound Pathing Question
daemon@ATHENA.MIT.EDU (Brandon Lehmann)
Tue Jun 10 01:35:41 2014
X-Original-To: nanog@nanog.org
From: Brandon Lehmann <brandon@bitradius.com>
To: "nanog@nanog.org" <nanog@nanog.org>
Date: Tue, 10 Jun 2014 05:35:24 +0000
In-Reply-To: <53960673.90400@west.net>
Errors-To: nanog-bounces@nanog.org
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If you're not familiar with how you can engineer traffic on L3's network
take a peek at
http://www.scn.rain.com/~neighorn/PDF/Traffic_Engineering_with_BGP_and_Le=
vel
3.pdf (slightly outdated but still useful)
As far as HE is concerned, when I asked them about communities a few =
weeks
ago all they could offer was a blackhole community.
However, as Jay said, you're likely at the mercy of the blended provider =
and
what they support.
> -----Original Message-----
> From: NANOG [mailto:nanog-bounces@nanog.org] On Behalf Of Jay Hennigan
> Sent: Monday, June 09, 2014 3:10 PM
> To: nanog@nanog.org
> Subject: Re: L3/HE/Inbound Pathing Question
>=20
> 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 =E0
> >
> > HE=E0 --- 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.
>=20
> Advertise a community to the other providers to localpref your =
prefixes
> down to the point of being a backup.
>=20
> 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).
>=20
>=20
> --
> --
> 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
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