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Date:	Thu, 07 Jun 2007 09:35:52 -0700
From:	Ben Greear <>
To:	Pavel Emelianov <>
CC:	David Miller <>,
	Linux Netdev List <>,
	"Eric W. Biederman" <>,
	Patrick McHardy <>,
	Daniel Lezcano <>,
	Stephen Hemminger <>,
	Kirill Korotaev <>,
	Linux Containers <>
Subject: Re: [PATCH] Virtual ethernet tunnel (v.2)

Pavel Emelianov wrote:

> Hmm... The loopback must be doing bad things then. It first calls
> eth_type_trans and then accounts for the new skb->len.

Perhaps it should be changed.  e100 calculates the entire
frame as far as I can tell, and e1000 and tg3 do it in hardware
(not sure what all they are counting, but I *think* it includes
the header...)

VLANs calculate before pulling it's header, though the ethernet
header has already been pulled by the time VLAN sees the skb.


Ben Greear <>
Candela Technologies Inc

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