I'm not sure you can get away without knowing the exact addressing for the value you wish to monitor. Unless things have changed recently, you need to take the oid values for the parameter you want to monitor, figure out what the index number of the entity you want information about (such as a ppp interface, ospf area or a global parameter), join them together and place the result in a configuration for a particular graph.
(Note: these examples are using generic mibs, since I don't have compiled versions of the cisco mibs handy. Since, based on your subject line, you're interested in router health, and want CPU statistics, I'm concerned that IOS version might be an issue, since Cisco has been migrating from one set of mibs to another over time, and I'm not aware of non-proprietary mibs for router memory & cpu usage-If anyone knows better, please enlighten). Unfortunately, I've not been happy with the detail on readily available sites addressing non-prepackaged snmp monitoring of cisco-specific variables: the most comprehensive one I've found is the somix templates site. For those willing to work through it , here's a partial overview addressing the "what do you do with them" part of the question. 1. figuring out what you want to monitor: MIB files are generally viewable via wordpad; I'm told they're in ASN.1 syntax (I haven't read the ISO documents myself, so I can't verify that), which some people find unwieldy, but you can certainly find descriptions associated with a given OID: Name: ospfSpfRuns Type: OBJECT-TYPE OID: 1.3.6.1.2.1.14.2.1.4 Full path: iso(1).org(3).dod(6).internet(1).mgmt(2).mib-2(1).ospf(14).ospfAreaTable(2). ospfAreaEntry(1).ospfSpfRuns(4) Module: OSPF-MIB Parent: ospfAreaEntry Prev sibling: ospfImportAsExtern Next sibling: ospfAreaBdrRtrCount Numerical syntax: Counter (32 bit) Base syntax: Counter32 Composed syntax: Counter32 Status: mandatory Max access: read-only Description: The number of times that the intra-area route table has been calculated using this area's link-state database. This is typically done using Dijkstra's algorithm. So, If you're interested in the description (to verify your ospf implementation's stability or lack thereof) , you'd use the OID value indicated. Note some tools such as MG-SOFT (disclosure: paying customer) or even snmputilg make this a lot, lot easier (I don't remember if Getif, the free one, can display the description of the object). The transmission node, iso(1).org(3).dod(6).internet(1).mgmt(2).mib-2(1).transmission(10), contains some useful media-specific sub-nodes (frame-relay, DS3 & others) featuring, at a minimium, error & traffic counts as well as state information. 2. Figuring out the instance ID/index: if you're interested in, say excessive collisions for a specific interface, you would issue an SNMPWALK on the following oid to get the list of available instances, and append the one you're looking for to 1.3.6.1.2.1.10.7.2.1.9 Name: dot3StatsExcessiveCollisions Type: OBJECT-TYPE OID: 1.3.6.1.2.1.10.7.2.1.9 Full path: iso(1).org(3).dod(6).internet(1).mgmt(2).mib-2(1).transmission(10).dot3(7).d ot3StatsTable(2).dot3StatsEntry(1).dot3StatsExcessiveCollisions(9) Module: EtherLike-MIB Parent: dot3StatsEntry Prev sibling: dot3StatsLateCollisions Next sibling: dot3StatsInternalMacTransmitErrors Numerical syntax: Counter (32 bit) Base syntax: Counter Composed syntax: Counter Status: mandatory Max access: read-only Reference: IEEE 802.3 Layer Management Description: A count of frames for which transmission on a particular interface fails due to excessive collisions. 3. Placing the results in a graph's configuration (sample excerpted from http://www.bubbagates.com/mrtg/mrtg.cfg): The line beginning with "Target" specifies the target SNMP object. ### PPP Dial-In Modem Lines on AS53001 (Scranton) ### Target[AS53001]: 1.3.6.1.4.1.9.10.19.1.1.4.0&1.3.6.1.4.1.9.10.19.1.1.5.0:[EMAIL PROTECTED] PageTop[AS53001]: PPP Dial-In Modem Lines on AS53001 (Scranton) ----- Original Message ----- From: "Richard Tufaro" To: Sent: Wednesday, February 27, 2002 11:01 PM Subject: Cisco CPU [7:36765] > Hey guys..a little off topic but where is the BEST place to find out how to > install and configure Cisco CPU and Memory stats with MRTG. I get to somix > and the MIB's but what do i do with them? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36777&t=36765 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
