nanog mailing list archives
Re: [ppml] too many variables
From: bmanning () vacation karoshi com
Date: Thu, 9 Aug 2007 21:04:04 +0000
On Thu, Aug 09, 2007 at 07:24:58AM -1000, Randy Bush wrote:
the fib in a heavily peered dfz router does not often converge now.
never? or over some predefined period of time?
the question is when will the router not be able to process the volume of churn, i.e. fall behind further and further?
yes. presuming the churn ratio stays the same and:
as there is non-trivial headroom in the algorithms,
the BGP algorithm does not change (BGP-5, BGP-6 etc anyone)
moore's law on the processors, etc. etc.,
yes, yes, yes... too many variables. fixing the processors to what is fielded TODAY, with existing algorithms, etc... if the ONE variable is to allow enough memory to hold prefixen, will BGP fail (a router not being able to process the volume of churn) at what point? (other variables: number of exteranal peers, IGP updates, AS path length, etc... what else needs to be considered?)
your message is as operationally meaningful as dave and john telling us they can handle 2m prefixes today.
well, maybe. the numbers were collected from live boxen. not enough data for anything you might be able to use tho.
randy
Current thread:
- too many variables bmanning (Aug 09)
- Re: [ppml] too many variables Randy Bush (Aug 09)
- 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: [ppml] too many variables Randy Bush (Aug 09)
- Re: too many variables bmanning (Aug 09)
- Re: too many variables Wayne E. Bouchard (Aug 09)