nanog mailing list archives
Re: Dampening considered harmful? (Was: Re: verizon.net and other email grief)
From: Jared Mauch <jared () puck nether net>
Date: Thu, 16 Dec 2004 23:43:12 -0500
On Fri, Dec 17, 2004 at 12:42:21AM +0100, Iljitsch van Beijnum wrote:
On 17-dec-04, at 0:21, Jerry Pasker wrote:ie: does dampening cause more problems than it tries to solve/avoid these days.I don't know what takes more router resources; dampening enabled doing the dampening calculations, or no dampening and constantly churning the BGP table. I would assume dampening generally saves router resources, or operators wouldn't chose to enable it.One reason to be careful with dampening is that flaps can be multiplied. (Connect to routeviews and see the different flap counts under different peers for the same flap at your end to observe this.)
There have been numerous people who have spoken and released research on this topic. I think with the "better" routing code out there these days, that most people can quickly handle a large number of next-hop changes, etc.. in their hw/sw that disabling dampening would allow the networks to reconverge fairly quickly without (much) trouble. (going to respond to the streaming video/audio/whatnot issue seperately). - jared -- Jared Mauch | pgp key available via finger from jared () puck nether net clue++; | http://puck.nether.net/~jared/ My statements are only mine.
Current thread:
- Re: verizon.net and other email grief, (continued)
- Re: verizon.net and other email grief Daniel Karrenberg (Dec 16)
- Re: verizon.net and other email grief Iljitsch van Beijnum (Dec 16)
- Re: verizon.net and other email grief just me (Dec 16)
- Re: verizon.net and other email grief Iljitsch van Beijnum (Dec 16)
- Re: verizon.net and other email grief Steve Gibbard (Dec 16)
- Re: verizon.net and other email grief Joe Maimon (Dec 16)
- Re: verizon.net and other email grief Bill Woodcock (Dec 16)
- Dampening considered harmful? (Was: Re: verizon.net and other email grief) Jared Mauch (Dec 16)
- Re: Dampening considered harmful? (Was: Re: verizon.net and other email grief) Jerry Pasker (Dec 16)
- Re: Dampening considered harmful? (Was: Re: verizon.net and other email grief) Iljitsch van Beijnum (Dec 16)
- Re: Dampening considered harmful? (Was: Re: verizon.net and other email grief) Jared Mauch (Dec 16)
- Re: Dampening considered harmful? (Was: Re: verizon.net and other email grief) Jared Mauch (Dec 16)
- Re: Dampening considered harmful? (Was: Re: verizon.net and other email grief) Yakov Rekhter (Dec 20)
- Re: verizon.net and other email grief Valdis . Kletnieks (Dec 16)
- Re: verizon.net and other email grief just me (Dec 16)
- Re: verizon.net and other email grief Valdis . Kletnieks (Dec 16)
- Re: verizon.net and other email grief just me (Dec 16)
- Re: verizon.net and other email grief Valdis . Kletnieks (Dec 16)
- Re: verizon.net and other email grief just me (Dec 16)
- Re: verizon.net and other email grief Michael . Dillon (Dec 17)
- Re: verizon.net and other email grief Simon Waters (Dec 17)