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Re: nic + detecting the presence of a carrier

On 9/1/06, Les Mikesell <lesmikesell gmail com> wrote:
On Fri, 2006-09-01 at 09:00 -0400, Jacques B. wrote:
> On 9/1/06, Gregory Machin <gregory machin 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 gmail com

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Good point.  I may have misunderstood the scenario.  I thought the OP
was looking to detect that in a script, not in a real time situation.
For that I do not know how it could be done with low overhead.  The
best I can suggest would be a crontab executing every x minutes
depending on the requirements of the OP.

Jacques B.

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