Problems with BARRNET network 131.119.250.119

Tue Apr 12 19:06:57 UTC 1994

  From: noc at barrnet.net
  Subject: Re: Problems with BARRNET network 131.119.250.119
      Our mailer tries to deliver mail to 131.119.250.119 (bargate.silvaco.com,
      SILVACO.BARRNET.NET) and gets host unreachable. Routes for 131.119.0.0 ar
>>e 
      given as:

      gw3#sh ip ro 131.119.0.0
      Routing entry for 131.119.0.0 (mask 255.255.255.0), 2 known subnets
        Redistributing via igrp 51771

      B       131.119.246.0 [200/100] via 193.23.5.33, 16:10:55
      B       131.119.253.0 [200/100] via 193.23.5.33, 16:11:51

  This is odd. You should have a route to 131.119.0.0/255.255.0.0 which handles
  all subnets of 131.119.

Did you turn off auto-summary, or did you add explicit network commands?
If you turned off auto-summary, you'll no longer generate a 131.119/16
route?

FYI, this is just a general warning to everyone... no auto-summary does
what you tell it to do. :-)  (Vince, let's take this private and we can
work out what went wrong...just in case.)

      Is it useful to add Class-B-Subnets to the routing table whilst we are
      trying to reduce Class-C entries?

  This was an oversight. We are sending the subnet routes to ENSS128 in order
  to insure correct next-hop resolution across our DMZ network. These subnets
  should not have been sent to other external peers and no longer will be.

  	Vince Fuller/BARRNet

  P.S. In the future, you will receive faster response if you send BARRNet
       problem reports directly to us, either to "noc at BARRNET.NET" or to the
       MERIT-maintained trouble list "as200-trouble at MERIT.EDU".