Jan> I've got a node called "bastion" in my network map and the
Jan> SNMP monitor plug-in asks every 60s for the interface load
Jan> from host "fuldasrv". This is the captured packet:
Jan> Is it correct to ask for four SNMP variables to just determine the
Jan> IfLoad value?
You need ifInOctets and ifOutOctets to do the calculation (see the
source or the help dialog for details about this). You need to check
sysUpTime whenever you monitor something because you have to deal with
counter discontinuities. The ifload monitor script also checks the
ifOperStatus because it wants to take some action if the interface
becomes unavailable (which is different from situations where the
interface load is 0). So you need them all.
SNMP often requires to move a whole bunch of information around for
even simple tasks like this. People are considering various ways to
build more flexible and effcient solutions in the IETF DISMAN working
group (http://www.cs.utwente.nl/~schoenw/disman).
Juergen
-- Juergen Schoenwaelder schoenw@cs.utwente.nl http://www.cs.utwente.nl/~schoenw Computer Science Department, University of Twente, (Fax: +31-53-489-3247) P.O. Box 217, NL-7500 AE Enschede, The Netherlands. (Tel. +31-53-489-3678)