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Re: BGP route tracking.
From: cowie () buda renesys com
Date: Fri, 15 Aug 2003 17:29:40 +0000 (GMT)



Some updated images of routing table size and 7-day prefix withdrawals: 

    http://gradus.renesys.com/aug2003/blackout3-rtsize.gif 

    http://gradus.renesys.com/aug2003/aug7-aug15-withdrawals.gif

(Blackout is event #3 on the right.)

We're about halfway back to the table sizes we started with yesterday 
before the grid tripped. If it trends the same way through the 
afternoon, it could be back to its old self sometime around midnight 
GMT; previous experience suggests that it might stabilize somewhat 
higher than before the event.  

At any rate, steady improvement as power returns across the East.    

----------
James Cowie
Renesys Corporation
cowie () renesys com





Okay, here are a couple quick screenshots of what we're looking at 
tonight.

First, a plot that shows the routing table size shrinkage since the 
onset of the blackout at 16:13:07 +/- EDT, across a group 
of routers. 

     http://gradus.renesys.com/aug2003/blackout1-rtsize.gif 

Second, a wider-angle 3D plot of prefix withdrawal rates over the 
last week, reported by various peers (one line per). 

     http://gradus.renesys.com/aug2003/aug7-aug14-withdrawals.gif

The blackout is the big event at the right hand edge (#3). 

Note the sustained high rates of route withdrawal that have been 
the norm since the onset of MSBlast.  Unlike typical single-cause 
events (like the one marked #1), MSBlast scanning has caused 
prefix withdrawal rates to gently "lift off" into a noiser mode 
across the board, lasting for days (so far).

(im just getting bored waiting for us to run out of fuel)

Ouch .. 


----------
James Cowie
Renesys Corporation
cowie () renesys com



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