nic + detecting the presence of a carrier

[Les Mikesell]

On Fri, 2006-09-01 at 09:00 -0400, Jacques B. wrote:
> On 9/1/06, Gregory Machin <gregory.machin at gmail.com> wrote:
> > Stunning data ... but doesnt tell me if the nic is unpluged .. :-(
> >
> 
> The suggestion by Frank works like a charm.  Either of the two works
> very well to detect if the NIC is working or not.  Then something as
> simple as:
> 
> /sbin/mii-tool eth0 | grep "link ok" && <insert command you wish to
> execute if link ok>
> with the command you wish to execute following the &&

Do you do that continuously to detect when the link goes down?  That
sounds like a lot of overhead.

-- 
  Les Mikesell
    lesmikesell at gmail.com