[54253] in North American Network Operators' Group

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Re: Cogent and Level3 Peering Issues

daemon@ATHENA.MIT.EDU (alex@yuriev.com)
Wed Dec 18 16:59:49 2002

Date: Wed, 18 Dec 2002 17:13:18 -0500 (EST)
From: alex@yuriev.com
To: william@elan.net
Cc: nanog@merit.edu
In-Reply-To: <Pine.LNX.4.33.0212181201580.2311-100000@sokol.elan.net>
Errors-To: owner-nanog-outgoing@merit.edu


> Thing is if your connection is completely full one way, it'll effect 
> traffic the other way too. It should not be happening with syncronyous 
> connections, but practical observation is that it does! I suspect router 
> hardware is to blame (possibly packet cache is way full) and I'v seen 
> it happen only if you try to send 100% more traffic then link can handle 
> (just 100% traffic does not efect it - have to really push it), this 
> happened on 100Mb and even on Gb interface.

If your circuit is full one way, it really makes no sense to be bothered
dealing with reverse path *before* fixing your forward path. Fix the
outbound (saturated) first, *then* look at the rest.

Alex


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