checking if an interface went down

hHG

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Feb 22, 2002, 5:18:08 PM2/22/02

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Does anyone know of any scripts that tests every few minutes whether or not
one of your interfaces went down (Network Administration scripts)? Any help
would be appreciated.....jdd

--
JD Durick, CCNA
KPMG LLP
2001 M. Street, NW
Washington, DC 20036
(202) 533-5534 (Office)

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.

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Feb 22, 2002, 5:30:46 PM2/22/02

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In comp.unix.admin hHG <icouldo...@yahoo.com> wrote:
> Does anyone know of any scripts that tests every few minutes whether or not
> one of your interfaces went down (Network Administration scripts)? Any help
> would be appreciated.....jdd

I believe "swatch" is what youre looking for.

-----.

--
Theres a hole in the world like a great black pit and
its filled with people who are filled with shit and the
vermin of the world inhabit it

Nicholas Bachmann

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Feb 22, 2002, 7:09:30 PM2/22/02

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hHG wrote:

> Does anyone know of any scripts that tests every few minutes whether or not
> one of your interfaces went down (Network Administration scripts)? Any help
> would be appreciated.....jdd

Note that I tested this for all of 30 seconds.

#!/bin/sh
# Interface checker by Nick Bachmann
if [ ! $1 ]
then
echo "Quick interface checker"
echo 'Nicholas Bachmann <nabac...@yahoo.com>'
echo
echo 'Usage: ./inckr <int1> <int2> <int3> etc.'
echo
exit 1
fi
while true
do
for int in $@
do
/sbin/ifconfig $int &>/dev/null || echo "$int is down `date`" |mail root
done
sleep 3m
done

--
Regards,
N
+-----------------------------------------------+
+ Nicholas Bachmann <nabac...@yahoo.com> +
+ "Finally, no security considerations are made +
+ with respect to the fact that over the course +
+ of infinite time, monkeys may evolve" +
+ -RFC 2795 +
+-----------------------------------------------+

Nicholas Bachmann

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Feb 22, 2002, 7:29:41 PM2/22/02

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Nicholas Bachmann wrote:

> hHG wrote:
>
>> Does anyone know of any scripts that tests every few minutes whether
>> or not
>> one of your interfaces went down (Network Administration scripts)?
>> Any help
>> would be appreciated.....jdd
>
>
>
> Note that I tested this for all of 30 seconds.

Which doesn't help. I made a small update to fix a big bug.

>
> #!/bin/sh
> # Interface checker by Nick Bachmann
> if [ ! $1 ]
> then
> echo "Quick interface checker"
> echo 'Nicholas Bachmann <nabac...@yahoo.com>'
> echo
> echo 'Usage: ./inckr <int1> <int2> <int3> etc.'
> echo
> exit 1
> fi
> while true
> do
> for int in $@
> do
> /sbin/ifconfig $int &>/dev/null || echo "$int is down `date`" |mail root

*should* be

/sbin/ifconfig | grep "$int" >/dev/null || echo "$int down `date`" |
mail root -s "Interface Down"

(all on one line)