Re: [RRG] Re: [RAM] Tunneling overheads and fragmentation

Gert Doering <gert@space.net> Wed, 12 September 2007 20:11 UTC

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Date: Wed, 12 Sep 2007 22:11:15 +0200
From: Gert Doering <gert@space.net>
To: Dino Farinacci <dino@cisco.com>
Subject: Re: [RRG] Re: [RAM] Tunneling overheads and fragmentation
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Hi,

On Tue, Sep 11, 2007 at 02:54:46PM -0700, Dino Farinacci wrote:
> >But what about inter-ISP links? I'm assuming this isn't a big issue  
> >for high capacity private peering, but here in Europe a lot of  
> >peering happens over exchanges, which obviously use equipment that  
> >can easily handle larger packets, but so many people are on a big  
> >fat shared subnet that it's a given at someone will bring down the  
> >lowest common denominator to 1500.
> 
> All GigE and higher. We are okay.

You might be.  We're not.  

At the DECIX, currently the 3rd biggest exchange in Europe, about one 
third of the members (all sharing a common L2 network!) are still 
connected with 100 Mbit/s.

Which means "1500 for all of them".

Gert Doering
        -- NetMaster
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