nanog mailing list archives
Re: HE.net BGP origin attribute rewriting
From: David Barak <thegameiam () yahoo com>
Date: Thu, 31 May 2012 08:33:27 -0400
On May 31, 2012, at 8:03 AM, sthaug () nethelp no wrote:
I disagree. Origin is tremendously useful as a multi-AS weighting tool, and isn't the blunt hammer that AS_PATH is.If you think of AS_PATH as a blunt hammer, how would you describe localpref? We use AS_PATH in many cases *precisely* because we don't consider it to be a blunt hammer...
So you're connected to providers A and B, who in turn connect to C. Additionally, B has customer D. If you set origin E toward B (leaving origin I toward A) you influence C's decision without affecting either B or D, and you ensure that C still learns both routes to you. It's a more subtle nudge than as-path. In general, I prefer routinely using attributes that are further down the algorithm so at the big guns can be saved for when they're needed or for special policy issues. David Barak Sent from a mobile device, please forgive autocorrection.
Current thread:
- HE.net BGP origin attribute rewriting Daniel Suchy (May 31)
- Re: HE.net BGP origin attribute rewriting Nick Hilliard (May 31)
- Re: HE.net BGP origin attribute rewriting David Barak (May 31)
- Re: HE.net BGP origin attribute rewriting sthaug (May 31)
- Re: HE.net BGP origin attribute rewriting David Barak (May 31)
- Re: HE.net BGP origin attribute rewriting Nick Hilliard (May 31)
- Re: HE.net BGP origin attribute rewriting Keegan Holley (May 31)
- Re: HE.net BGP origin attribute rewriting David Barak (May 31)
- Re: HE.net BGP origin attribute rewriting Keegan Holley (May 31)
- Re: HE.net BGP origin attribute rewriting Richard A Steenbergen (May 31)
- Re: HE.net BGP origin attribute rewriting Leo Bicknell (May 31)
- Re: HE.net BGP origin attribute rewriting Keegan Holley (May 31)
- Re: HE.net BGP origin attribute rewriting David Barak (May 31)
- Re: HE.net BGP origin attribute rewriting Steve Meuse (May 31)
- Re: HE.net BGP origin attribute rewriting Keegan Holley (May 31)
- Re: HE.net BGP origin attribute rewriting Nick Hilliard (May 31)
- Re: HE.net BGP origin attribute rewriting Nick Hilliard (May 31)