[69224] in North American Network Operators' Group
Re: DSL and/or Routing Problems
daemon@ATHENA.MIT.EDU (Alex Bligh)
Wed Mar 31 06:42:32 2004
Date: Wed, 31 Mar 2004 12:41:57 +0100
From: Alex Bligh <alex@alex.org.uk>
Reply-To: Alex Bligh <alex@alex.org.uk>
To: Jon.Kibler@aset.com, nanog@merit.edu
Cc: Alex Bligh <alex@alex.org.uk>
In-Reply-To: <200403301208.i2UC8Hrm017646@mail.trustem.net>
Errors-To: owner-nanog-outgoing@merit.edu
--On 30 March 2004 07:08 -0500 Jon.Kibler@aset.com wrote:
> Yesterday we starting noticing long delays on an ADSL connection
I am betting you are running ping under linux. There is some linux bugette
(I think cosmetic) that occasionally causes Linux to count down
(effectively) 9, 8, 7, 6, 5, 4, 3, 2, 1 secs. I once tracked it down and it
was something boring like DNS resolution in ping. Check with tcpdump you
are /really/ seeing that delay. Oh and make sure you are pinging something
unloaded, not a router that has better things to do. I have no doubt you
are seeing some delay (or you wouldn't have started looking) but I would
bet ping is putting you off the scent.
Alex
