Re: new ipdelay= option for faster netboot

Willy Tarreau
2009-08-18T04:56:28Z

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