ping hanging forever

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I'm running a script that's doing a periodic ping to some cisco routers.

I'm using ping -w 5 to have it bail out in case the host is down /
unreachable.
somehow there are a few ones that are not directly attached that ping
will wait for forever.
I do have a correct route to them.

Does someone have a clue why the -w option does not work in those cases?
Should the intermediate router be sending icmp unreachables or something
like that?

Serge Maandag 

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