MONITORING remote hosts with 128 line -->> giving UNKNOWN states..most of the time..

[Arno Lehmann]

Tharanga,

basically you found out why you want to monitor your network - to detect 
problems.

If you only want to chech the remote hosts, you could also stay away 
from snmp and use nsca for passive monitoring. This, of course, means 
that you need access to the remote host, but monitoring passively and 
setting up a safe (long) freshness_threshold together with an active 
check that generates an error state you should be able to achieve what 
you want.

Limited by a probably insufficient network link, of course.

Arno

Andreas Ericsson wrote:

> Tharanga wrote:
> 
>> Hi all,
>>
>> i configured nagios and evrything is workig fine. but when i tried to
>> monitor remote hosts in the WAN link...it gives lot of no response
>> errors. and all the processes coming to "unknown" state. iam using
>> snmp to check some process, hard disk..stuff...iam not using NRPE. we
>> have a 128 line. some times ping process diplayes RTA = 1400...5000
>> ms . UDP is connectionloess and i think snmp packets are droppping
>> somewhere.
> 
> 
> Most likely, yes.
> 
>> sometimes it gives correct out put....with ok
>> states..critical..and real values like hard dik space...memory
>> usage...via snmo.. how do i improve my monitoring process...
> 
> 
> By giving udp and icmp a higher priority in your network, or reserving 
> about half the bandwidth for your nagios server. This means you'll steal 
> bandwidth from users for the monitoring. If that doesn't work or isn't 
> acceptable you'll have to upgrade your line.
> 
>> hope u
>> guys can help... me to solve this...is there any way to fine tune the
>> nagios polling...?? ( in my checkcommands i used TIMEOUT value with a
>> high threshold but didnt work......).
>>
> 
> There's really no help for lack of bandwidth, except to get more. A 
> proxy server might help, but only to some extent.
> 
> Please don't ask "how do I limit bandwidth" or "how do I set up a proxy 
> server" on this list (or privately). Both topics require far more time 
> to explain than I have to spare.
> 
>> thaks in advance Tharanga
> 
> 

-- 
IT-Service Lehmann                    al at its-lehmann.de
Arno Lehmann                  http://www.its-lehmann.de


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