We all know that /24s have run amuck. According to the APNIC bgp statistics (http://www.apnic.net/stats/bgp) view of the internet, the current prefix distribution looks: Routing Table Report June 08, 2001 BGP routing table entries examined: 106727 Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:20 /9:5 /10:6 /11:9 /12:32 /13:77 /14:207 /15:346 /16:6905 /17:1175 /18:2174 /19:6720 /20:5247 /21:4509 /22:6779 /23:8684 /24:61402 /25:278 /26:450 /27:463 /28:489 /29:374 /30:317 /31:1 /32:58 This mean over 57% of the routing table consists of /24s. So in order to facilitate getting this fixed, I have prepared a list of the worst offenders and their specific blocks which (most likely) have no reason for not being aggregated. If all of these entries could be aggregated (and I'm certain this simple script missed some), it would reduce the routing table by over 29,000 entries, to less the 78k. I think it's pretty obvious that a lot of these simply have no excuse. http://www.e-gerbil.net/ras/projects/ipaddr/24amuck.txt A list of ASNs with the largest sized offending blocks (not overall count, #1 is UU #2 is BBN #3 is Telstra nothing unexpected there) is: 2711 - Rock Hill Telephone Company 8112 - Bell Atlantic Internet Solutions 701 - UUNet Technologies, Inc. 11371 - Rhythms NetConnections 226 - Los Nettos 7029 - Alltel Information Services, Inc. 18687 - MGC Communications, Inc. 6595 - DoD Education Activity Network Assistance Center 1677 - ANS Communications 1785 - AppliedTheory Corporation 1326 - Advanced Networks & Services Inc. 6499 - Brooks Fiber Properties, Inc. I highly encourage anyone interested to yell at these people. -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)
On Fri, 8 Jun 2001, Richard A. Steenbergen wrote:
This mean over 57% of the routing table consists of /24s. So in order to facilitate getting this fixed, I have prepared a list of the worst offenders and their specific blocks which (most likely) have no reason for not being aggregated. If all of these entries could be aggregated (and I'm certain this simple script missed some), it would reduce the routing table by over 29,000 entries, to less the 78k. I think it's pretty obvious that a lot of these simply have no excuse.
I'd suggest you review your data. Checking our AS (7657) you list networks we havn't had for 6 months advertised to a peer we havn't had for 3 months. Not to mention you don't even list a bunch of /24s we are advertising (for various reasons (not all good)). -- Simon Lyall. | Newsmaster | Work: simon.lyall@ihug.co.nz Senior Network/System Admin | Postmaster | Home: simon@darkmere.gen.nz ihug, Auckland, NZ | Asst Doorman | Web: http://www.darkmere.gen.nz
Where did you get this list of prefixes? I just checked the routes you report for our AS (7018) and every one I've check so far is aggregated. Most are /19's and /18's. Michelle Truman AT&T Internet Services -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of Richard A. Steenbergen Sent: Friday, June 08, 2001 2:51 AM To: nanog@merit.edu Subject: /24s run amuck again We all know that /24s have run amuck. According to the APNIC bgp statistics (http://www.apnic.net/stats/bgp) view of the internet, the current prefix distribution looks: Routing Table Report June 08, 2001 BGP routing table entries examined: 106727 Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:20 /9:5 /10:6 /11:9 /12:32 /13:77 /14:207 /15:346 /16:6905 /17:1175 /18:2174 /19:6720 /20:5247 /21:4509 /22:6779 /23:8684 /24:61402 /25:278 /26:450 /27:463 /28:489 /29:374 /30:317 /31:1 /32:58 This mean over 57% of the routing table consists of /24s. So in order to facilitate getting this fixed, I have prepared a list of the worst offenders and their specific blocks which (most likely) have no reason for not being aggregated. If all of these entries could be aggregated (and I'm certain this simple script missed some), it would reduce the routing table by over 29,000 entries, to less the 78k. I think it's pretty obvious that a lot of these simply have no excuse. http://www.e-gerbil.net/ras/projects/ipaddr/24amuck.txt A list of ASNs with the largest sized offending blocks (not overall count, #1 is UU #2 is BBN #3 is Telstra nothing unexpected there) is: 2711 - Rock Hill Telephone Company 8112 - Bell Atlantic Internet Solutions 701 - UUNet Technologies, Inc. 11371 - Rhythms NetConnections 226 - Los Nettos 7029 - Alltel Information Services, Inc. 18687 - MGC Communications, Inc. 6595 - DoD Education Activity Network Assistance Center 1677 - ANS Communications 1785 - AppliedTheory Corporation 1326 - Advanced Networks & Services Inc. 6499 - Brooks Fiber Properties, Inc. I highly encourage anyone interested to yell at these people. -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)
participants (3)
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Michelle T -
Richard A. Steenbergen -
Simon Lyall