[118436] in North American Network Operators' Group
Re: Consistent asymetric latency on monitoring?
daemon@ATHENA.MIT.EDU (Nathan Ward)
Wed Oct 21 21:41:00 2009
From: Nathan Ward <nanog@daork.net>
In-Reply-To: <4ADFB5D4.7050408@coders.net>
Date: Thu, 22 Oct 2009 14:40:00 +1300
To: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 22/10/2009, at 2:31 PM, Perry Lorier wrote:
> I assume this product works by having a packet with a timestamp sent
> from the source to the destination where it is timestamped again and
> either sent back, or another packet is sent in the other direction.
> The difference between the two timestamps gives you the latency in
> that direction.
I believe a packet is sent, and the target router responds with a
timestamp.
But yeah, timestamps are being compared.
I'm with Perry though - sounds like your clocks are drifting.
--
Nathan Ward
