On Jan 14, 2008 10:30 AM, Drew Weaver <[EMAIL PROTECTED]> wrote: > I haven't noticed too many instances of this causing huge performance > problems, > but I have noticed some, has anyone noticed any instances in the real world > where this > has actually caused performance gains over symmetrical routing?
Drew, There are at least two common scenarios where intentional asymmetric routing (aka traffic engineering) benefits the sender: Scenario 1: InterNAP-like product where the outbound packet takes a path optimized for conditions other than shortest AS path. Conditions might include minimize packet loss or maximize throughput as determined by ongoing communication with testpoints in that direction. Scenario 2: Cost minimization for bulk transfer. If you operate a large mailing list or a usenet server, you might arrange for traffic from the server to prefer peers first and then your lowest-cost transit provider. Regards, Bill Herrin -- William D. Herrin [EMAIL PROTECTED] [EMAIL PROTECTED] 3005 Crane Dr. Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
