nanog mailing list archives
Re: Load Balancing Multiple DS3s (outgoing) on a 7500
From: Will Yardley <william+nanog () hq dreamhost com>
Date: Sat, 13 Mar 2004 16:19:40 -0800
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")
Current thread:
- Load Balancing Multiple DS3s (outgoing) on a 7500 Drew Weaver (Mar 12)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Patrick W . Gilmore (Mar 12)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 joe mcguckin (Mar 12)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Patrick W . Gilmore (Mar 12)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Stephen J. Wilcox (Mar 13)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Patrick W . Gilmore (Mar 14)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 joe mcguckin (Mar 12)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Joe Abley (Mar 12)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Will Yardley (Mar 13)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Nick Feamster (Mar 25)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Patrick W . Gilmore (Mar 12)
- Re: Load Balancing Multiple DS3s (outgoing) on a 7500 Bruce Pinsky (Mar 15)
- <Possible follow-ups>
- RE: Load Balancing Multiple DS3s (outgoing) on a 7500 Michel Py (Mar 12)