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RE: GLBX ICMP rate limiting (was RE: Tier-1 without their own bac kbone?)
From: "Temkin, David" <temkin () sig com>
Date: Thu, 28 Aug 2003 08:49:32 -0400

Not that Yipes is necessarily a transit provider by any means, but they have
done the same thing within the cores of their network.  I was
troubleshooting an issue yesterday that was pointing to them for 15-20%
packet loss, and I called them and they stated that they started rate
limiting ICMP last weekend, but that it was only on a temporary basis.

-----Original Message-----
From: variable () ednet co uk [mailto:variable () ednet co uk] 
Sent: Thursday, August 28, 2003 8:24 AM
To: nanog () merit edu
Subject: GLBX ICMP rate limiting (was RE: Tier-1 without their own

On Wed, 27 Aug 2003, jlewis () lewis org wrote:

We have a similarly sized connection to MFN/AboveNet, which I won't 
recommend at this time due to some very questionable null routing 
they're doing (propogating routes to destinations, then bitbucketing 
traffic sent to them) which is causing complaints from some of our 
customers and forcing us to make routing adjustments as the customers 
notice MFN/AboveNet has broken our connectivity to these destinations.

We've noticed that one of our upstreams (Global Crossing) has introduced 
ICMP rate limiting 4/5 days ago.  This means that any traceroutes/pings 
through them look awful (up to 60% apparent packet loss).  After 
contacting their NOC, they said that the directive to install the ICMP 
rate limiting was from the Homeland Security folks and that they would not 
remove them or change the rate at which they limit in the foreseeable 

What are other transit providers doing about this or is it just GLBX?



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