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Re: Global view increase (was:BGP route explosion)

  • From: Marshall Eubanks
  • Date: Thu May 02 13:58:41 2002 
UUNET has "re-absorbed" 6869 routes and everything seems back to
normal here.

Marshall

David G. Andersen wrote:
This is more w.r.t. the huge burst of announcements yesterday,
not a persistent increase in the routing table sizes, but..

We saw absolutely huge amounts of announcements from
1 3459 17676 (sometimes with padding)

For example, see:

http://ginseng/bgpview.cgi?time=between&start=2002-05-01+06%3A00%3A00&end=2002-05-01+07%3A00%3A00&bins=100&prefix=&rel=eq&aspath=&asrel=contain&origin_as=17676&scale=linear&table=updates_new&action=plot&View=View

(Sorry for the long URL). Shows that we received something like 30k announcements that originated from 17676 between 6 and 7 am on May 1st.
They were primarily announcing /23s out of large address space ranges
allocated to APNIC, like 219.31/16 and friends.

-Dave


On Thu, May 02, 2002 at 11:33:50AM +0100, Stephen J. Wilcox mooed:

We see that too

Predominantly seems to be massive amounts of /24s in a couple of nets
which were previously /16s. Culprit would appear to be AS705

*>i63.0.0.0/24      62.24.196.1                   100      0 286 209 701 705 i
*>i63.1.0.0/24      62.24.196.1                   100      0 286 209 701 705 i
*>i63.2.0.0/24      62.24.196.1                   100      0 286 209 701 705 i
.....

Lots of new /20-24 in 67.0.0.0/8 also AS705

In total AS705 is announcing 4432 new routes from yesterday.


If you're interested a copy of all new routes since yesterday is at:

http://noc.opaltelecom.net/newbgp020502.txt

THe file is 0.5Mb so I couldnt really email it :)

Steve



On Thu, 2 May 2002, James Spenceley wrote:
Around 15mins ago an additional ~5,000 routes entered the global view, sadly
they appear to be hanging around.
Last Tuesday had an increase of 2,000 routes.
+7000 routes in a week is significant de-aggregation or leak, any ideas on
where these routes are flowing ?

I've not seen an increase on any of our peers, so I can only assume its
coming from a network who doesn't peer particularly "openly".

--
James




--
                                 Regards
                                 Marshall Eubanks

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