nanog mailing list archives
Re: too many variables
From: "Wayne E. Bouchard" <web () typo org>
Date: Thu, 9 Aug 2007 14:33:09 -0700
On Thu, Aug 09, 2007 at 09:08:05PM +0000, bmanning () vacation karoshi com wrote:
On Thu, Aug 09, 2007 at 02:56:31PM -0400, Patrick Giagnocavo wrote:On Aug 9, 2007, at 12:21 PM, bmanning () vacation karoshi com wrote:so putting a stake in the ground, BGP will stop working @ around 2,500,000 routes - can't converge... regardless of IPv4 or IPv6. unless the CPU's change or the convergence algorithm changes.That is a pretty big "unless" .sure... how often do you completely swap out all your router processors? anyone running something other than BGP4? (BGP3 and EGP don't count)
See, thats the whole thing here... There will always be legacy equipment in the network. There will always be advances in processors and newer equipment will be able to handle more. The REAL question is wether a threshold will be reached for some popular older equipment before it gets largely cycled out of use. The odd company having a problem on one or two boxes is no big deal. Major carrier A having problems in 6 or 12 (or possibly many more) routers simultaneously is a bit of an issue. Could even cause a cascade to external nodes as routers die and reload. To an extent, this can be dealt with through damping and filtering policies but there will still be a vulnerability. What should be considered is wether or not the curve of route growth will overtake the curve of hardware upgrades and increases in overall base levels of processing power. My personal oppinion is that it's unlikely. Possible, but unlikely. -Wayne --- Wayne Bouchard web () typo org Network Dude http://www.typo.org/~web/
Current thread:
- Re: [ppml] too many variables, (continued)
- Re: [ppml] too many variables bmanning (Aug 09)
- Re: [ppml] too many variables Randy Bush (Aug 09)
- Re: [ppml] too many variables vijay gill (Aug 09)
- Re: [ppml] too many variables bmanning (Aug 09)
- Re: too many variables Patrick Giagnocavo (Aug 09)
- Re: too many variables Leigh Porter (Aug 09)
- Re: too many variables Steve Atkins (Aug 09)
- Re: too many variables Lucy Lynch (Aug 09)
- Message not available
- Re: too many variables Patrick Giagnocavo (Aug 09)
- Re: too many variables Leigh Porter (Aug 09)
- Re: too many variables bmanning (Aug 09)
- Re: too many variables bmanning (Aug 09)
- Re: too many variables Wayne E. Bouchard (Aug 09)
- Re: too many variables Joel Jaeggli (Aug 09)
- Message not available
- Re: [ppml] too many variables vijay gill (Aug 10)
- Re: [ppml] too many variables Leo Bicknell (Aug 10)
- Re: [ppml] too many variables vijay gill (Aug 10)
- Re: [ppml] too many variables Eliot Lear (Aug 13)
- Re: [ppml] too many variables Leo Bicknell (Aug 13)
- Re: [ppml] too many variables Eliot Lear (Aug 13)
- Re: [ppml] too many variables Cat Okita (Aug 13)