MIB=Management Information Base. That's the tree structure of elements SNMP provides.
An OID (Object Identifier) is a particular element in the tree. It has a number like .1.3.6.1.4.1.2021.9.1.101 that defines it's place in the tree. Many (but not all) also have names, like system.sysDescr.0, and system.sysUpTime.0 The O'Rielly book "Essential SNMP" gives a pretty good overview of how SNMP works. The nagios plugin "check_snmp" calls a program calles snmpget to retrieve single element values and checks them against provided limits. If you want to do anything fancy (like retrieve related name/value pairs in corresponding branches), you need to write a script that uses snmpget. > -----Original Message----- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of > Ranga Nathan > Sent: Wednesday, January 21, 2004 2:30 PM > To: [EMAIL PROTECTED] > Subject: Re: [LINUX-390] Nagios - CPU and Memory monitoring? > > > MIB? (Men In Black?) . OID element? Sorry, could you expand? > > > I got the Corotona 2 from Parallelgraphics.com. Nice to see that the > download installs for both IE and Mozilla. > > > > > > "Hall, Ken (IDS ECCS)" <[EMAIL PROTECTED]> > > Sent by: Linux on 390 Port <[EMAIL PROTECTED]> > 01/21/2004 05:06 AM > Please respond to Linux on 390 Port > > > To: [EMAIL PROTECTED] > cc: > Subject: Re: Nagios - CPU and Memory monitoring? > > > I'm monitoring disk space remotely using a script that calls > getsnmp, but > that's only because check_snmp couldn't do what I needed. There's no > reason you shouldn't be able to retrieve any MIB element > as long as you know the OID and format. I picked up a MIB > browser called > "getif" that's been very helpful. > > Which VRML plugin are you using? I haven't been able to get > that to work, > my browser rejects the incoming data. > > > -----Original Message----- > > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of > > Ranga Nathan > > Sent: Tuesday, January 20, 2004 9:47 PM > > To: [EMAIL PROTECTED] > > Subject: [LINUX-390] Nagios - CPU and Memory monitoring? > > > > > > Just got Nagios installed and configured. The CGI's are > > working great. I > > love the VRML 3D display. > > Now, how do I monitor memory and CPU usage? > > Also it seems that with a proper SNMP + plugin one should be able to > > monitor almost any resource - including z/OS. Anyone tried this? > > TIA > > >
