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Date: Tue, 18 Aug 2009 06:56:03 +0200 From: Willy Tarreau <w@....eu> To: david@...g.hm Cc: Rick Jones <rick.jones2@...com>, David Miller <davem@...emloft.net>, tim.bird@...sony.com, r.schwebel@...gutronix.de, vda.linux@...glemail.com, linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org, arjan@...ux.intel.com, kernel@...gutronix.de, netdev@...r.kernel.org Subject: Re: new ipdelay= option for faster netboot On Mon, Aug 17, 2009 at 07:45:33PM -0700, david@...g.hm wrote: > On Mon, 17 Aug 2009, Rick Jones wrote: > > >David Miller wrote: > >>I have card/switch combinations that take up to 10 seconds to > >>negotiate a proper link. > > > >Gotta love it when things adhere to specs... > > the default on Cisco switches is to wait 30 seconds before fully enabling > the port so that it can listen for spanning tree broadcasts. And this causes a lot of trouble in high availability environments, because the link is up but unusable. So if you're using it as a primary bond link you can lose connectivity for that time. Fortunately, you can configure the port in "switchport mode access", "portfast" mode to avoid this annoying delay. Willy -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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