L3/HE/Inbound Pathing Question

Jay Hennigan jay at west.net
Mon Jun 9 19:09:39 UTC 2014

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 at impulse.net
Impulse Internet Service  -  http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV

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