They will almost always prefer their IBGP to any learned routes. Why send traffic to a transit network and skew their I/O peering numbers when you can handle it yourself. I doubt you will change their mind. Robert D. Scott Robert@ufl.edu Senior Network Engineer 352-273-0113 Phone CNS - Network Services 352-392-2061 CNS Phone Tree University of Florida 352-392-9440 FAX Florida Lambda Rail 352-294-3571 FLR NOC Gainesville, FL 32611 321-663-0421 Cell -----Original Message----- From: Edward Brookhouse [mailto:ebroo@setuidzero.org] Sent: Wednesday, August 05, 2009 11:36 AM To: nanog@nanog.org Subject: Sprint/Verizon BGP Hi all, Any Sprint BGP admins on this list can offer any thoughts on why Sprint connected networks are preferring my Sprint connection when they should be preferring my Verizon? I (Healthy Directions) am AS16387, two blocks 63.73.158.0/24 and 63.78.31.0/24, being announced by sprint and Verizon, preferred to Verizon(DS3) over Sprint 3MB. Verizon BGP admins think everything is ok, have not heard back from BGP4 at sprint. Any thoughts appreciated, off-list contact welcome. Edward ebroo@healthydirections.com