Messages in this thread | | | Date | Tue, 18 Aug 2009 06:56:03 +0200 | From | Willy Tarreau <> | Subject | Re: new ipdelay= option for faster netboot |
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On Mon, Aug 17, 2009 at 07:45:33PM -0700, david@lang.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
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