[52902] in North American Network Operators' Group
Re: AMS-IX problems
daemon@ATHENA.MIT.EDU (Mike Hughes)
Wed Oct 23 07:28:12 2002
Date: Wed, 23 Oct 2002 12:27:12 +0100 (BST)
From: Mike Hughes <mike@smashing.net>
To: "Stephen J. Wilcox" <steve@telecomplete.co.uk>
Cc: Iljitsch van Beijnum <iljitsch@muada.com>,
"Nipper, Arnold" <arnold@nipper.de>, <nanog@merit.edu>
In-Reply-To: <Pine.LNX.4.21.0210231215120.19052-100000@MrServer>
Errors-To: owner-nanog-outgoing@merit.edu
On Wed, 23 Oct 2002, Stephen J. Wilcox wrote:
>
> > It's very interesting to see the traffic stats at
> > http://www.ams-ix.net/hugegraph.html Usually, incoming and outgoing
> > traffic is the same. But during this problem, much more traffic went out
> > than came in.
>
> Curious, as the exchange sources no traffic that shouldnt really be possible ;)
>
> (unless the graphs are inaccurate)
If there is something nasty happening with STP, or traffic is flooding,
you will count the same traffic several times - once for each egress port
that it hits - hence aggregate traffic out > traffic in.
Broadcast traffic is also counted multiple times in aggregated stats.
Mike
