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