On Wed, Jul 23, 2008 at 7:46 AM, <[EMAIL PROTECTED]> wrote: > Quoting William Herrin <[EMAIL PROTECTED]>: > >> On Tue, Jul 22, 2008 at 5:35 PM, K. Sriram <[EMAIL PROTECTED]> wrote: >> > At 02:32 PM 7/22/2008, William Herrin wrote: >> >> > X can be quite large for core BGP routers -- 100s of peers or BGP >> > interfaces. > > Please see slides 33-36 from this presentation: > http://www.antd.nist.gov/~ksriram/BGP_Security_Analysis_NIST_Study.pdf
Very interesting. To summarize: about 10% of the ASes have at least 10 neighbors and a little over 1% have more than 100. One AS appears to have had 3,622 neighbors! Can we extrapolate from this to guess at the configuration of individual routers? I would expect that even with MPLS in play, a particular router would have a handful of external exits plus a bunch of MPLS labels functioning as virtual exits, each leading to a router that then has another handful of external exits. I would imagine, for example, that the gentleman with 3,622 neighbors doesn't have 3,622 unique best-next-hops in any one of his routers' FIBs. So what -does- he have? And how many routers does he have that on? Regards, Bill -- William D. Herrin ................ [EMAIL PROTECTED] [EMAIL PROTECTED] 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
