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.