[smokeping-users] Smokeping packet loss issues

[Israel Brewster]

On Oct 10, 2007, at 4:42 PM, Tobias Oetiker wrote:

> Israel,
>
> note the smokeping configures fping with 500ms default timeout ...

note that I mentioned I set the timeout to 2 seconds... :-)

> also fping sends several pings in quick succession .. there may be
> icmp ratelimiting configured somewhere on the way ...

I tried pushing the minimum time between sending packets up as high  
as 10 seconds (-i10000) when testing from the command line, but while  
it somewhat helped (I got four packets back a couple of times) it  
didn't solve the problem- all the packets after the first few were  
still lost. Also note that I can run ping on this host with the "-i  
0.0001" switch and get no packet loss-and I think that is rather  
faster than fping sends out its packets, especially if I give fping a  
high -i value. If I run ping with the -f switch, then I do start  
seeing some packet loss, but not the 100% loss I get with fping after  
the first couple of packets. Letting ping run for a couple of seconds  
with the -f switch, for example, only gave me 12% packet loss, and I  
was continually receiving packets. There is definitely something else  
going on here. I don't suppose there is a standard ping plugin for  
smokeping that I could use instead? That wouldn't fix the issues with  
fping, of course, but at least it should give me proper results. Thanks!

-----------------------------------------------
Israel Brewster
Computer Support Technician
Frontier Flying Service Inc.
5245 Airport Industrial Rd
Fairbanks, AK 99709
(907) 450-7250 x293
-----------------------------------------------
>
> cheers
> tobi
>
> Yesterday Israel Brewster wrote:
>
>> I am having some issues using smokeping with the fping plugin to
>> monitor one of my routers. Specifically, when using fping from the
>> command line, I get two, or occasionally three, packets returned from
>> the router, and then nothing, no matter how long I let it loop.
>> Stopping and restarting it gives me another two returns, then again
>> nothing. Smokeping shows the same situation, reporting 90% packet
>> loss. Using ping on the same host at the same time shows no packet
>> loss for as long as I want to leave it running. Using smokeping/fping
>> on two other identical routers also works properly- it is only this
>> one router that gives the issues, and only when using fping. These
>> are all high-latency hosts (600-1000 ms is typical), but I have the
>> timeout set to 2 seconds, so that should be more than long enough.
>> Would you have any idea why this is happening, and what I can do to
>> fix it? Thanks.
>>
>> -----------------------------------------------
>> Israel Brewster
>> Computer Support Technician
>> Frontier Flying Service Inc.
>> 5245 Airport Industrial Rd
>> Fairbanks, AK 99709
>> (907) 450-7250 x293
>> -----------------------------------------------
>>
>>
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>>
>>
>
> -- 
> Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
> http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902