[mrtg] Re: pings

[Robert_Mersberger at BeverlyCorp.com]

I am running MRTG on an nt4.0 box and have been using ping-probe for some
time and it works great and unmodified does provide two graphs.  

-----Original Message-----
From: Peter W. Osel [mailto:pwo at Infineon.COM]
Sent: Tuesday, May 21, 2002 3:24 AM
To: Anthony Lai
Cc: Sawyer, David; 'Paulo Andre'; Mrtg (E-mail)
Subject: [mrtg] Re: pings



>>>>> On Mon, May 20, 2002 at 07:54:31AM -0700, "" == Anthony Lai
<savedadogs at yahoo.com> wrote:
> 
> What happens if there are lost packets or the host is unreachable...
> how do these ping scripts handle these circumstances?
> What does MRTG graph when it encounters such a scenerio? Thanks.
> Anthony

The pong section of mrtg-misc-probe checks for reachability only and
returns 0 and 1 depending on whether the target is ping'able or not.
packet loss is ignored.

By default, mrtg-ping-probe returns 0 as the round trip time if the
target is not reachable.  You can change the returned value through an
option.  packet loss is ignored.

mrtg-ping-probe can monitor packet loss, but then the rtt is ignored.

so with mrtg-ping-probe you need two graphs (one for rtt, one for
packet loss).


smokeping does all this in one graph, you definitely want to take a
look at it:
	http://people.ee.ethz.ch/~oetiker/webtools/smokeping/

I have not yet used it, but it does looks extremly good and I cannot
wait until I find the time to install it.

Hope this helps
	--pwo

--
Peter W. Osel                   Sr. Network & Systems Manager
Infineon Technologies           Email: pwo at Infineon.COM
North America Corp.             Phone: +1 (408) 501 6321
1730 North First Street         Fax:   +1 (408) 501 2410
San Jose, CA 95112, USA         WWW:   http://pwo.de/

pgp key fingerprint = 79 2D DD 49 C0 AA D8 CF  2C F9 A5 6A BA 37 0E 28

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