On Fri, Mar 12, 2004 at 11:37:25PM -0500, Joe Abley wrote:
On 12 Mar 2004, at 23:24, joe mcguckin wrote:
I suspect that each FE goes to a different AS...
In that case, sample/count outbound traffic volumes by (prefix/AS/AS_PATH/something), sort the resulting list, and develop an import policy based on the top N entries which shares the traffic by tweaking some other attribute to avoid the last-resort tie-break.
The tool "ehnt" is pretty useful for generating a "top" style list of ASes in order of the amount of traffic you're sending their way. By the way, w/r/t to the tiebreaker stuff, note that (on Cisco devices) if you don't have "bgp bestpath compare-routerid" set, the route that was received first will be preferred. This minimizes route-flap, but can cause weird shifts in your traffic patterns when one bgp session or another goes down (credit goes to Mark Nagel for figuring out this one for me). -- "Since when is skepticism un-American? Dissent's not treason but they talk like it's the same..." (Sleater-Kinney - "Combat Rock")