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Re: 204.82.160.0/22 invisible
From: Elliot Alby <ealby () sprint net>
Date: Wed, 27 Sep 1995 11:55:51 -0400 (EDT)

Poking at this futher, Sprint is announcing 204.82.160/22; Digex is
behind ANS; this route is not in the RADB; and since ANS insists on all
routes being in the RADB, they are not accepting it, so Digex is not
seeing it.

not so (see below) i see only 204.82.0.0
 
We are configured to hear this announcement at the Sprint NAP and
Mae-East via AS1239 but it is not being announced.

Could someone tell me *where* Sprint is announcing 204.82.160/22?  I don't
see it at the CIX or at any point where ANS peers with Sprint.  It
appears as if only 204.82/16 is being announced by MCI:

SL-MAE-E#sho ip route 204.82.160.0
Routing entry for 204.82.0.0 255.255.0.0, supernet
  Known via "bgp 1239", distance 20, metric 1
  Tag 3561, type external
  Last update from 192.41.177.181 05:06:43 ago
  Routing Descriptor Blocks:
  * 192.41.177.181, from 192.41.177.181, 05:06:43 ago
      Route metric is 1, traffic share count is 1

ICM-MAE-E#sho ip route 204.82.160.0
Routing entry for 204.82.0.0 255.255.0.0, supernet
  Known via "bgp 1800", distance 20, metric 0
  Tag 3561, type external
  Last update from 192.41.177.181 3d13 ago
  Routing Descriptor Blocks:
  * 192.41.177.181, from 192.41.177.181, 3d13 ago
      Route metric is 0, traffic share count is 1

192.41.177.181 = cpe2.Washington.mci.net

checking arbitrarily on sprintlink backbone: 

SL-FW-8#sho ip route 204.82.160.0
Routing entry for 204.82.0.0 255.255.0.0, supernet
  Known via "bgp 1791", distance 20, metric 1
  Tag 1239, type external
  Last update from 144.228.105.1 04:10:01 ago
  Routing Descriptor Blocks:
  * 144.228.105.1, from 144.228.30.5, 04:10:01 ago
      Route metric is 1, traffic share count is 1

144.228.105.1 = sl-mae-w.sprintlink.net

SL-MAE-W#sho ip route 204.82.160.0
Routing entry for 204.82.0.0 255.255.0.0, supernet
  Known via "bgp 1239", distance 20, metric 1
  Tag 3561, type external
  Last update from 198.32.136.12 05:00:20 ago
  Routing Descriptor Blocks:
  * 198.32.136.12, from 198.32.136.12, 05:00:20 ago
      Route metric is 1, traffic share count is 1

198.32.136.12 = mae-west.SanFrancisco.mci.net

seems ok to me.
 
 
Fix: Either get ANS to not insist on all routes being in the RADB or
submit an update to the RADB & wait for ANS to regenerate their
configs.

the latter is quicker and pragmatic. but i wish ans would quit splitting 
hairs on the subnet mask, we would need to submit so many less route 
objects.. 

- elliot alby/sprintlink



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