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Re: pppoe and receive checksum offload

To: Stephen Hemminger <shemminger@xxxxxxxx>
Subject: Re: pppoe and receive checksum offload
From: "David S. Miller" <davem@xxxxxxxxxxxxx>
Date: Sun, 27 Feb 2005 20:20:11 -0800
Cc: mostrows@xxxxxxxxxxxxx, kuznet@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20050224155906.73890361@xxxxxxxxxxxxxxxxx>
References: <20050224155906.73890361@xxxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
On Thu, 24 Feb 2005 15:59:06 -0800
Stephen Hemminger <shemminger@xxxxxxxx> wrote:

> Someone reported a problem with skge hardware receive checksumming and PPPOE
> but it looks like a generic problem.  Since PPPOE adds additional header
> bytes the hardware computed checksum will be wrong.  
> 
> Not sure if this is correct, but shouldn't pppoe be doing the following:

Changing or expanding the link level headers should only mess
up the hw checksum if you are using CHECKSUM_HW, is that what
your skge driver is using?

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