North American Network Operators Group
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Strange announcements for www.cisco.com

  • From: Neil J. McRae
  • Date: Wed Feb 09 04:11:42 2000 
To QWEST NOC PEOPLE

Folks,
You appear to be announcing 198.133.219.0, which is the
network that www.cisco.com lives on, whats strange is that
you are then transiting this route onto GTEI [AS1] to deliver
the traffic. This is fairly sub-optimal and I'm sure incorrect.

kenny>sh ip bgp 198.133.219.25
BGP routing table entry for 198.133.219.0/24, version 23258497
Paths: (4 available, best #1, advertised over IBGP)
  3356 209
    209.244.160.57 from 209.244.160.57 (209.244.2.210)
      Origin IGP, metric 4401, localpref 100, valid, external, best
  3356 209, (received-only)
    209.244.160.57 from 209.244.160.57 (209.244.2.210)
      Origin IGP, metric 4401, localpref 100, valid, external
  1 109
    4.1.74.105 from 4.1.74.105 (4.0.4.8)
      Origin IGP, metric 11340, localpref 100, valid, external
      Dampinfo: penalty 492, flapped 1 times in 00:00:23
  1 109, (received-only)
    4.1.74.105 from 4.1.74.105 (4.0.4.8)
      Origin IGP, metric 11340, localpref 100, valid, external

kenny>traceroute www.cisco.com

Type escape sequence to abort.
Tracing the route to www.cisco.com (198.133.219.25)

  1 serial4-0-3.hsa1.nyc1.Level3.net (209.244.160.57) [AS 3356] 0 msec 0 msec 0 msec
  2 hsipaccess2.Denver1.Level3.net (209.244.2.61) [AS 3356] 48 msec 48 msec 48 msec
  3 hsipaccess2.Seattle1.Level3.net (209.244.2.23) [AS 3356] 76 msec 72 msec 76 msec
  4 209.0.227.130 [AS 3356] 76 msec 200 msec 148 msec
  5 sea-core-01.inet.qwest.net (205.171.26.53) [AS 209] 76 msec 72 msec 76 msec
  6 sfo-core-02.inet.qwest.net (205.171.5.105) [AS 209] 84 msec 84 msec 84 msec
  7 sjo-core-01.inet.qwest.net (205.171.5.121) [AS 209] 80 msec 80 msec 80 msec
  8 sjo-edge-05.inet.qwest.net (205.171.22.46) [AS 209] 84 msec 84 msec 80 msec
  9 a5-0-1.sanjose1-nbr1.bbnplanet.net (4.24.145.1) [AS 1] 84 msec 84 msec 84 msec
 10 p4-0.paloalto-nbr2.bbnplanet.net (4.0.1.1) [AS 1] 84 msec 84 msec 84 msec
 11 p0-0-0.paloalto-cr18.bbnplanet.net (4.0.3.86) [AS 1] 84 msec 84 msec 84 msec
 12  *  *  * 
 13 pigpen.cisco.com (192.31.7.9) [AS 109] 88 msec 88 msec 88 msec
 14 www.cisco.com (198.133.219.25) [AS 209] 88 msec 84 msec 88 msec

A fix/explanation would be useful.

Regards,
Neil.
--  
Neil J. McRae                                C O L T  I N T E R N E T
[email protected]