Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

RE: /24s run amuck again

  • From: Karyn Ulriksen
  • Date: Fri Jun 08 12:35:25 2001

I had a full /19 sliced and diced up into /24 until yesterday when I
officially completed my data center migration.  None appear in the list
below.  How recent is this information?

Karyn  

:: -----Original Message-----
:: From: Richard A. Steenbergen [mailto:ras@e-gerbil.net]
:: Sent: Friday, June 08, 2001 12:51 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)
:: 
:: 
:: 
:: 




Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.