Odd UUNET BGP announcements for interior netblocks
David G. Andersen
dga at lcs.mit.edu
Fri Apr 26 04:09:31 UTC 2002
We periodically see UUNET suddenly leak large numbers of what I can only
assume are interior routes, to quite a few peers, and then rapidly withdraw
them:
+---------------------+------+-------------------+------+--------+
| time | type | prefix | mask | aspath |
+---------------------+------+-------------------+------+--------+
| 2002-04-24 03:20:50 | A | 208.254.255.0 | 24 | 1 701 |
| 2002-04-24 03:22:14 | A | 208.254.255.0 | 24 | 1 701 |
| 2002-04-24 03:22:36 | W | 208.254.255.0 | 24 | NULL |
+---------------------+------+-------------------+------+--------+
... now you see it, now you don't. A check with routeviews shows
that we're not the only one seeing such things. For instance, from
AT&T's perspective:
+---------------------+--------+------+---------------+------+----------+
| time | src_as | type | prefix | mask | aspath |
+---------------------+--------+------+---------------+------+----------+
| 2002-04-24 03:20:39 | 7018 | A | 208.254.255.0 | 24 | 7018 701 |
| 2002-04-24 03:21:06 | 7018 | A | 208.254.255.0 | 24 | 7018 701 |
| 2002-04-24 03:22:05 | 7018 | A | 208.254.255.0 | 24 | 7018 701 |
| 2002-04-24 03:22:35 | 7018 | W | 208.254.255.0 | 24 | NULL |
+---------------------+--------+------+---------------+------+----------+
These seem to happen about once a month or so, typically at odd hours.
Is this a goof up, or some strange leakage during filter reconfiguration?
Anyone from UUNET care to clue me in?
Thanks,
-Dave
--
work: dga at lcs.mit.edu me: dga at pobox.com
MIT Laboratory for Computer Science http://www.angio.net/
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