[c-nsp] BGP peer/customer routes

[Pete Templin]

On 5/31/2011 5:57 AM, vince anton wrote:
> So what happens now is that for this more specific customer prefix, I have a
> specific route saying some AS5 nets are preferable via the peering link than
> via the direct customer link,  and if I want to deliver transit traffic to
> my customer, my router would choose the peering link.  This is not desirable
> behaviour.
My standard practice has always been to apply a high local preference on 
customer-announced routes, medium local pref on peer-announced routes, 
and low (but still higher than the system default of 100) local pref on 
upstream-announced routes.  The logic behind this is: "I'd rather get 
paid for traffic than exchange traffic for free than pay for traffic."

If you then communicate the local preference structure to your customer, 
you then basically turn the keys over to the customer to control their 
routing as they wish.  I also provide customers with an opportunity to 
tweak local pref within my network using communities, so they can 
override in that manner as well.

pt