0 bytes pin using check_ping

[Andy Shellam (Mailing Lists)]

Why do you need to make a "0 byte" ping?  (I'm not particularly up on 
networking, but a 0 byte ping would in theory send nothing, right?)

Tried doing this on my Fedora system, and you still get a minimum of 8 
bytes back:

/bin/ping -s 0 www.google.com
PING www.l.google.com (216.239.59.99) 0(28) bytes of data.
8 bytes from 216.239.59.99: icmp_seq=1 ttl=243

The Nagios plugin doesn't seem to have a size parameter, so to limit 
network traffic what you could do is only send 1 packet (in practice I 
believe it will send 2 - one when it first runs the plugin, then another 
to confirm the result - don't know why, but it's been bought to light on 
the list toward the beginning of December.)

Thus you would add "-p 1" to your check_ping command (or change the 
current value of "-p" if it's already present) to only send 1 packet.

Hope this helps.

Andy.



dhaval thakar wrote:
> Dear All,
>
> I want to monitor my VSAT branches using nagios,
> For that I need to make 0 bytes ping.
>
> Kindly suggest me how to ping 0 bytes useing check_ping plugin.
>
>
> Regards
> Dhaval
>
> _________________________________________________________________
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-- 
Andy Shellam
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