netdev - Re: [PATCH] vlan: propogate MTU changes

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Date:	Mon, 6 Oct 2008 22:14:30 +0200 (CEST)
From:	Krzysztof Oledzki <ole@....pl>
To:	Stephen Hemminger <shemminger@...tta.com>
cc:	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH] vlan: propogate MTU changes

On Mon, 6 Oct 2008, Stephen Hemminger wrote:

> Propogate MTU changes of underlying device to all related VLAN
> devices.
> see: https://bugzilla.vyatta.com/show_bug.cgi?id=3742

Not sure about this... Some switches (HP ProCurve for example) allow to 
select which vlan accepts jumbo frames and which does not and attach both 
to the same port. It is quite useful as you are able to setup one vlan 
with jumbo frames dedicated for example to servers connected by 1G/10G 
links, and a second vlan with standard 1500 MTU distributed to non 
jumbo-aware switches/workstations.

Best regards,

 				Krzysztof Olędzki