Misconfigured BGP

28 Apr 2001

      Hello;

I sent a previous version of this message Friday morning to the admin contact for 
AS 1237, but I have as yet received no response.

I am not sure if this is a real problem - I can still ping them - but it
looks ugly to me.

-------------------------------------------------------------------------------------
The BGP announcements for
   System Engineering Research Institute (SERI) (ASN-EUNSOL)
   R&D Net Group
   Eoeun-dong 1, Daejon
   KR

   Autonomous System Name: KREONET
   Autonomous System Number: 1237

appear to be misconfigured :

*> 150.183.34.0/24  157.130.46.53                          0 701 6453 1237 9270 1237 i
etc.

This is a routing loop; although it may work in practice, it is not a proper
use of BGP and may not do what you intended. A list of all of
the (many) affected address blocks follows.

                                   Regards
                                   Marshall Eubanks

   Multicast Technologies, Inc.
   10301 Democracy Lane, Suite 410
   Fairfax, Virginia 22030
   Phone : 703-293-9624          Fax     : 703-293-9609     
   e-mail : tme@on-the-i.com     http://www.on-the-i.com         

 Test your network for multicast : http://www.multicasttech.com/mt/
-----------------------------------------------------------------------------------------------------------
 will search for routing loops 
 ROUTING LOOP Detected for ASN  1237 Prefix =  150.183.34.0/24   : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  150.183.35.0/24   : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  150.183.38.0/24   : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.118.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.119.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.120.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.121.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.122.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.123.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.124.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.125.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.230.126.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.32.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.34.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.37.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.39.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.40.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.41.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.42.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.43.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.45.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.47.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.49.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.51.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.60.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.61.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.237.62.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.241.175.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.247.194.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.247.197.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.247.198.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.247.199.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.247.201.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.247.202.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.247.203.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.250.189.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.250.191.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  203.253.247.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.98.47.0       : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.98.58.0       : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.98.59.0       : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.130.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.131.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.144.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.145.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.146.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.147.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.148.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.149.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.150.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.151.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.152.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.154.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.155.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.156.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.157.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.158.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.159.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.210.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.211.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.212.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.213.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.214.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.215.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.216.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.217.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.218.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.219.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.220.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.221.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.110.223.0     : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.59.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.60.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.61.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.62.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.63.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.85.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.90.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.119.91.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.48.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.49.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.50.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.51.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.52.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.53.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.54.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.125.55.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =  210.219.57.0      : PATH = :  1239  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN  1237 Prefix =                    : PATH = :   701  6453  1237  9270  1237 
 ROUTING LOOP Detected for ASN 11303 Prefix =  216.52.158.0      : PATH = :  1239 11853 11303 11301 11303 
 ROUTING LOOP Detected for ASN 11303 Prefix =                    : PATH = :   701 11853 11303 11301 11303