netdev - Re: [PATCH] Hyperv: Trigger DHCP renew after host hibernation

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Date:	Mon, 21 Jul 2014 11:01:38 +0200
From:	Richard Weinberger <richard@....at>
To:	"Yue Zhang (OSTC DEV)" <yuezha@...rosoft.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"driverdev-devel@...uxdriverproject.org" 
	<driverdev-devel@...uxdriverproject.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	KY Srinivasan <kys@...rosoft.com>,
	Thomas Shao <huishao@...rosoft.com>,
	Dexuan Cui <decui@...rosoft.com>
Subject: Re: [PATCH] Hyperv: Trigger DHCP renew after host hibernation

Yue,

Am 21.07.2014 10:44, schrieb Yue Zhang (OSTC DEV):
> Hi, Richard
> 
> IMHO, all networking implementations should handle the cable offline event. Consider
> this situation. I unplugged the network cable and connect it to a new network switch
> after 10 seconds. If the DHCP renew is not triggered, the network will break. I think in 
> normal cases, it should already been handled properly. Unless there is a strong 
> justification for not doing this. In that case, we shouldn't renew DHCP anyway.

I agree that they should handle the cable offline event.
My concern is that 10 seconds is maybe not a the right choice.
(As we cannot know all implementations)

Thanks,
//richard
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