Collected by a colleague of mine at work. may be useful in constructing a readme. /home/mmm/help/snmp #--ucdsnmp now known as net-snmp (5.) http://www.net-snmp.org/ ~ $ snmpwalk -Cc vlan1 public system.sysDescr.0 = 5.1.4.70.R03 Service Release, February 16, 2004. system.sysObjectID.0 = OID: enterprises.6486.800.1.1.2.1.1.1.1 system.sysUpTime.0 = Timeticks: (370339500) 42 days, 20:43:15.00 system.sysContact.0 = Alcatel Internetworking, www.ind.alcatel.com system.sysName.0 = OMNI7700-THALES system.sysLocation.0 = THALES-COMPUTERS-Toulon system.sysServices.0 = 72 interfaces.ifNumber.0 = 76 interfaces.ifTable.ifEntry.ifIndex.1001 = 1001 interfaces.ifTable.ifEntry.ifIndex.1002 = 1002 ... takes several minutes. See snmpcmd(1) for all options. can also walk cetia: snmpwalk -Cc cetia public snmpwalk localhost public snmpget Scalars must have oid ending 0. #--commands http://www.net-snmp.org/tutorial/tutorial-5/commands/index.html 1. snmptranslate: learning about the MIB tree. 2. snmpget: retrieving data from a host. 3. snmpgetnext: retrieving unknown indexed data. 4. snmpwalk: retrieving lots of data at once! 5. snmptable: displaying table. 6. snmpset: peforming write operations. 7. snmptrap: Sending and receiving traps, and acting upon them. 1. Sending and receiving SNMPv3 TRAPs and INFORMs 8. Common command options: 1. Using and loading MIBS 2. SNMPv3 Options 3. Customized Output Formats #--snmpd demon agent. gathers data locally, replies to requests for data. #--snmptrapd demon listens for incoming traps. logs its, sends email, runs script. #--example code http://www.net-snmp.org/tutorial/tutorial-5/toolkit/index.html # Programming a simple application. # Programming a asynchronous application. # How to program a mib module to serve information described by an SNMP MIB, and how to compile it into the net-snmp snmpd agent. # Compiling a mib module to be used as a dynamically loaded shared object. # Writing a subagent program to attach to the master SNMP agent. # Extend the agent using perl and the NetSNMP::agent perl module. # Letting mib2c generate code for you. #--snmp traps perl munger http://www.snmptt.org/docs/snmptt.shtml SNMP Trap Translator, eg run a script when a trap received by snmptrapd. #--suse 9 /etc/init.d/snmpd start #--mrtg http://www.net-snmp.org/tutorial/tutorial-5/mrtg/index.html mrtg is useful cos it provides an snmpd.conf to monitor system info and network use, disk space, free memory, eg User vs Idle CPU usage #--simple application http://www.net-snmp.org/tutorial/tutorial-5/toolkit/index.html ~/snmp/tutorial/ to get a var from a host snmpdemoapp.c: uses v3 authentication. see DEMO_USE_SNMP_VERSION_3 link with -lsnmp #include <net-snmp/net-snmp-config.h> #include <net-snmp/net-snmp-includes.h> init_snmp("myapp"); struct snmp_session session: address of remote snmp_sess_init(&session); session.peername = strdup("remote hostname"); session.version = SNMP_VERSION_1; session.community = "public"; session.community_len = strlen(session.community); struct snmp_session *ss; ss = snmp_open(&session); // socket. if(ss==0) ok struct snmp_pdu pdu; pdu = snmp_pdu_create(SNMP_MSG_GET); // empty packet oid anOID[MAX_OID_LEN]; size_t anOID_len = MAX_OID_LEN; // eg get system.sysDescr.0: one of these 3: read_objid(".1.3.6.1.2.1.1.1.0", anOID, &anOID_len); get_node("sysDescr.0", anOID, &anOID_len); read_objid("system.sysDescr.0", anOID, &anOID_len); // as its a get, need to pair null value to oid snmp_add_null_var(pdu, anOID, anOID_len); // copy to pdu struct snmp_pdu *response; status = snmp_synch_response(ss, pdu, &response); // send it. wait reply if (status == STAT_SUCCESS) if(response->errstat == SNMP_ERR_NOERROR) // ok else snmp_errstring(response->errstat)) else snmp_sess_perror("snmpget", ss); if ok struct variable_list *vars; for(vars = response->variables; vars; vars = vars->next_variable) print_variable(vars->name, vars->name_length, vars); if (vars->type == ASN_OCTET_STR) char *sp = malloc(1 + vars->val_len); memcpy(sp, vars->val.string, vars->val_len); sp[vars->val_len] = '\0'; snmp_free_pdu(response); snmp_close(ss); #--writing a MIB http://www.simpleweb.org/ietf/rfcs/rfcbytopic.html Structure of Management Information Version 2 (SMIv2) http://tools.ietf.org/html/rfc2578 Textual Conventions for .. SNMPv2 rfc1903.txt Concise MIB definitions http://www.simpleweb.org/ietf/rfcs/complete/rfc1212.txt Structure and Identification of Management Information for TCP/IP-based .. http://www.simpleweb.org/ietf/rfcs/complete/rfc1155.txt ASN.1 http://en.wikipedia.org/wiki/Abstract_syntax_notation http://www.columbia.edu/~ariel/ssleay/layman.html Not all basic types of ASN.1 are allowed in MIBs. Principally INTEGER,OBJECT IDENTIFIER,OCTET STRING, built up with SEQUENCE and SEQUENCE OF. In particular, no floating point! Whitespace ignored. -- comment until -- or eol. "string of ascii only" can have \n\r. '01010000'b binary (multiple of 8) 'ffaabb00'h hex (multiple of 2) Objects are in groups. The whole of a group must be implemented. If an object class can have multiple instances, need to declare a table. Each column is a class attribute. Use <~20 columns so can fit in a pdu. macro call: <descriptor> <macro> <clauses> ::= <value> where descriptor starts lowercase, best <32chars, no -. partial entry: mynameforobject OBJECT-TYPE SYNTAX INTEGER UNITS "RMS Volts" MAX-ACCESS read-write STATUS current <-- as opposed to obsolete, deprecated DESCRIPTION "blah blah" ::= { parentname 1 } <-- oid, parent plus new subindex 1, 2,... if an entry is like an enum, list the possible values, 0 is not allowed! SYNTAX INTEGER { disabled(1), enabled(2), muted(3) } SYNTAX INTEGER (1..2147483647) can add info on how to print, if integer value: DISPLAY-HINT "d" format is either "x" "o" "b" for hex octal binary, or "d-<shift>" where shift is number of decimal places to shift, eg d-3 => 1234 prints as 1.234 For OCTET STRING, format is <repeat><bytes>{xdoa}[<char>]<fillchar> For a string value, of some max len 32 say: SYNTAX DisplayString (SIZE (0..31)) <--ascii SYNTAX OCTET STRING (SIZE(12)) <--binary data SYNTAX BITS ? SYNTAX TimeTicks <--time in secs*100 since some epoch SYNTAX Gauge <--non-negative with some fixed max SYNTAX NetworkAddress <--IP SYNTAX PhysAddress <--mac SYNTAX Counter <--non-negative monotonic increasing with wrap SYNTAX Counter64 <--64 bits SYNTAX OBJECT IDENTIFIER <--an oid? lists: SYNTAX SEQUENCE { <type1>, ..., <typeN> } tables: SYNTAX SEQUENCE OF <entry> rfc1903 talks of TEXTUAL-CONVENTION macro to allow you to create new type of thing that says how to display it too. Eg DateAndTime, TruthValue. Hundredths ::= TEXTUAL-CONVENTION DISPLAY-HINT "d-2" SYNTAX INTEGER (0..10000) start with example rfc1628 UPS-MIB wget http://www.ietf.org/rfc/rfc1628.txt run smistrip on it or look for mibs on http://www.simpleweb.org/ietf/mibs/ http://www.mibsearch.com/ (pay: http://www.mibdepot.com/index.shtml) see my /home/mmm/snmp/RACK-MIB.txt based on UPS-MIB Add your mib to snmp.conf mibs +MY-MIB Put your mib in the search path: $HOME/.snmp/mibs /usr/share/snmp/mibs Check you can find your oid fieldname snmptranslate -IR MyVoltage (for testing can use "-m +MY-MIB" cmd args, or export MIBS=+MY-MIB, and set MIBDIRS search path) #--mib2c: MFD: MIBs For Dummies converts a mib description to prototype C files to implement an agent. ~/snmp/tutorial/ http://www.net-snmp.org/tutorial/tutorial-5/toolkit/mfd/if-mib/ifTable/index.html tutorial using predefined ifTable oid. mib2c-update can update your app when you change your mib later. You need to . write a mib . generate code with mib2c on toplevel node . Implement a netsnmp_container for data access . Implement GET request functions . Implement SET request functions You can run your agent as a subagent of main snmp (using AgentX), or compile as dynamic loadable module, or compile with main snmp src. mib2c -c CONFIGFILE [-I PATH] [-f OUTNAME] [-i][q][-S VAR=VAL] MIBNODE using a configfile: mib2c.scalar.conf <-your fn called for each get mib2c.int_watch.conf <-tie vars to scalars, no sideeffect mib2c.iterate.conf <-table mib2c.create-dataset.conf <-table no side effect to set mib2c.array-user.conf <-table index direct to data, but sideeffect mib2c.column_defines.conf <-generate defines for columns mib2c.column_enums.conf Software generated for agent has 4 contexts or structs: User Context. your handle MIB context. hold mib index for row Data Context. data needed to get/set a value. Row Request Context. groups the other 3. netsnmp_container interfaces to your data store. either: first request for table calls cache_load(netsnmp_container) later requests use cached values for a time or: any request, calls get_next() repeatedly loops over all items. or: you wrap a netsnmp_container around your existing data fetch full snmp agent api: http://www.net-snmp.org/dev/agent/group__handler.html On qemu, need to install gw1:/data/RPMS-RHEL4-U3/RedHat/RPMS/net-snmp-perl-5.1.2-11.EL4.6.i386.rpm #++++ --example agent with no side effect. get/set integer var-- http://www.net-snmp.org/dev/agent/scalar__int_8c-example.html file: myscalar_int.c #include <net-snmp/net-snmp-config.h> #include <net-snmp/net-snmp-includes.h> #include <net-snmp/agent/net-snmp-agent-includes.h> static int example1 = 42; /* default value */ void init_myscalar_int(void){ // function name must match init_FILENAME() !! oid my_registration_oid[] = { 1, 3, 6, 1, 4, 1, 8072, 2, 1, 1, 0 }; netsnmp_register_int_instance("my example int variable", my_registration_oid, OID_LENGTH(my_registration_oid), &example1, NULL); } #-- http://www.nagiosexchange.org/Demosites.138.0.html?&tx_netnagext_pi1%5Bowner%5D=JdYidMBHR1QW3MIdPHvnyrSDzMJpq9fPSYzU5UfpU3Q%3D #-- http://www.net-snmp.org/tutorial/tutorial-5/index.html http://www.net-snmp.org/docs/FAQ.html #--monitor apache internals http://freshmeat.net/projects/mod-apache-snmp/ #--perl http://snmp-info.sourceforge.net/ SNMP::Info gives an object oriented interface to information obtained through SNMP #-- http://freshmeat.net/projects/braa/ Braa is a tool for making SNMP queries. http://sourceforge.net/projects/snarl-snmp #--standard mibs http://www.ietf.org/rfc/rfc2737.txt IF-MIB 2233 The Interfaces Group MIB using SMIv2 Entity MIB rfc2737 for many of a kind? MIBII 1213 for Network Management of TCP/IP-based internets EtherLike-MIB 2665 IGMP-MIB 2993 Architectural Implications of NAT RMON-MIB 1757 Remote Network Monitoring #--example MIBs listed by cisco for a product: Standard MIBs ? IF-MIB (RFC-2233) ? ENTITY-MIB (RFC-2737) ? MIBII (RFC1213) ? EtherLike-MIB (RFC-2665) ? IGMP-MIB (RFC-2993) ? RMON-MIB (RFC-1757) Expression MIBs SNMPv2-SMI ? SNMPv2-TC ? SNMPv2-MIB ? IANAifType-MIB Simple Network Management Protocol (SNMP) v3 MIBs ? SNMP-FRAMEWORK-MIB (RFC-2571) ? SNMP-MPD-MIB (RFC-2572) ? SNMP-NOTIFICATION-MIB (RFC-2573) ? SNMP-TARGET-MIB (RFC-2573) ? SNMP-USM-MIB (RFC-2574) ? SNMP-VACM-MIB (RFC-2575) DOCSIS? and EuroDOCSIS MIB ? DOCS-IF-MIB (v2 Rev04) ? DOCS-CABLE-DEVICE-MIB (RFC-2669) ? DOCS-BPI-PLUS-MIB (Rev 5) ? DOCS-QOS-MIB (Rev 4) ? DOCS-CABLE-DEVICE-TRAP-MIB ? DOCS-SUBMGT-MIB (Rev 2) Cisco DOCSIS MIBs ? CISCO-CABLE-WIDEBAND-MIB ? CISCO-DOCS-EXT-MIB ? CISCO-DOCS-REMOTE-QUERY-MIB ? CISCO-DOCS-QOS-EXT-MIB ? CISCO-CABLE-SPECTRUM-MIB ? CISCO-CABLE-AVAILABILITY-MIB ? CISCO-DOCS-EXT-CAPABILITY-MIB Cisco Generic MIBs ? CISCO-SYSLOG-MIB ? CISCO-SMI-MIB ? CISCO-TC-MIB ? CISCO-PRODUCTS-MIB ? CISCO-FLASH-MIB ? CISCO-CONFIG-MAN-MIB ? CISCO-CONFIG-COPY-MIB ? CISCO-MEMORY-POOL-MIB ? CISCO-BULK-FILE-MIB ? CISCO-SONET-MIB ? CISCO-TCP-MIB ? CISCO-RTTMON-MIB ? CISCO-FTP-CLENT-MIB ? CISCO-IPMROUTE-MIB ? CISCO-QUEUE-MIB ? CISCO-IMAGE-MIB ? CISCO-ENVMON-MIB ? CISCO-ENTITY-VENDORTYPE-OID-MIB ? CISCO-PRODUCTS-MIB #--pmp6 rpm -qi net-snmp Version : 5.1.2 /usr/share/snmp/mibs/UCD-SNMP-MIB.txt /usr/share/snmp/mibs/SNMP-COMMUNITY-MIB.txt /usr/share/snmp/mibs/IP-MIB.txt /usr/share/snmp/mibs/NET-SNMP-AGENT-MIB.txt /usr/share/snmp/mibs/SNMP-USER-BASED-SM-MIB.txt /usr/share/snmp/mibs/HOST-RESOURCES-TYPES.txt /usr/share/snmp/mibs/DISMAN-SCRIPT-MIB.txt /usr/share/snmp/mibs/IANA-ADDRESS-FAMILY-NUMBERS-MIB.txt /usr/share/snmp/mibs/SNMP-TARGET-MIB.txt /usr/share/snmp/mibs/IPV6-UDP-MIB.txt /usr/share/snmp/mibs/HCNUM-TC.txt /usr/share/snmp/mibs/SNMPv2-TM.txt /usr/share/snmp/mibs/LM-SENSORS-MIB.txt /usr/share/snmp/mibs/IPV6-TCP-MIB.txt /usr/share/snmp/mibs/IPV6-MIB.txt /usr/share/snmp/mibs/SNMP-FRAMEWORK-MIB.txt /usr/share/snmp/mibs/DISMAN-SCHEDULE-MIB.txt /usr/share/snmp/mibs/IP-FORWARD-MIB.txt /usr/share/snmp/mibs/RMON-MIB.txt /usr/share/snmp/mibs/IANAifType-MIB.txt /usr/share/snmp/mibs/INET-ADDRESS-MIB.txt /usr/share/snmp/mibs/SNMPv2-TC.txt /usr/share/snmp/mibs/RFC-1215.txt /usr/share/snmp/mibs/SNMP-PROXY-MIB.txt /usr/share/snmp/mibs/IF-INVERTED-STACK-MIB.txt /usr/share/snmp/mibs/NET-SNMP-TC.txt /usr/share/snmp/mibs/SMUX-MIB.txt /usr/share/snmp/mibs/SNMPv2-CONF.txt /usr/share/snmp/mibs/UDP-MIB.txt /usr/share/snmp/mibs/NOTIFICATION-LOG-MIB.txt /usr/share/snmp/mibs/RFC1155-SMI.txt /usr/share/snmp/mibs/IPV6-ICMP-MIB.txt /usr/share/snmp/mibs/UCD-IPFWACC-MIB.txt /usr/share/snmp/mibs/IF-MIB.txt /usr/share/snmp/mibs/IPV6-TC.txt /usr/share/snmp/mibs/SNMP-NOTIFICATION-MIB.txt /usr/share/snmp/mibs/SNMP-USM-AES-MIB.txt /usr/share/snmp/mibs/NET-SNMP-MIB.txt /usr/share/snmp/mibs/HOST-RESOURCES-MIB.txt /usr/share/snmp/mibs/UCD-DEMO-MIB.txt /usr/share/snmp/mibs/NET-SNMP-EXAMPLES-MIB.txt /usr/share/snmp/mibs/TCP-MIB.txt /usr/share/snmp/mibs/SNMPv2-MIB.txt /usr/share/snmp/mibs/IANA-LANGUAGE-MIB.txt /usr/share/snmp/mibs/AGENTX-MIB.txt /usr/share/snmp/mibs/EtherLike-MIB.txt /usr/share/snmp/mibs/UCD-DLMOD-MIB.txt /usr/share/snmp/mibs/SNMP-MPD-MIB.txt /usr/share/snmp/mibs/UCD-DISKIO-MIB.txt /usr/share/snmp/mibs/SNMP-VIEW-BASED-ACM-MIB.txt /usr/share/snmp/mibs/SNMPv2-SMI.txt /usr/share/snmp/mibs/RFC1213-MIB.txt grep -i temperature /usr/share/snmp/mibs/* /usr/share/snmp/mibs/LM-SENSORS-MIB.txt # vva has changed PMP6/pmp-base-config/pmp-base-config/usr/share/powermp/etc/snmp/snmpd.conf so community "public" is read-only? added systemview. #diff -U1 /var/pmp-backup/snmpd.conf.20060719-083424 /etc/snmp/snmpd.conf +# laTable +view systemview included .1.3.6.1.4.1.2021.10 +# systemStats +view systemview included .1.3.6.1.4.1.2021.11 -syslocation Unknown (edit /etc/snmp/snmpd.conf) -syscontact Root <root at localhost> (configure /etc/snmp/snmp.local.conf) +syslocation PowerMP Rack +syscontact Root <root at powermp> # ls -l /etc/snmp/snmpd.conf /var/net-snmp/snmpd.conf /var/pmp-backup/snmpd.conf.20060719-083424 /usr/share/powermp/etc/snmp/snmpd.conf -rw-r--r-- 1 root root 18646 Jul 19 08:34 /etc/snmp/snmpd.conf -rw-r--r-- 1 root root 18646 Jul 5 15:30 /usr/share/powermp/etc/snmp/snmpd.conf got copied to above. -rw-r--r-- 1 root root 18579 Jul 19 08:34 /var/pmp-backup/snmpd.conf.20060719-083424 -rw------- 1 root root 661 Aug 16 18:05 /var/net-snmp/snmpd.conf created by demon. ignore. #--man snmpd.conf EXTENSIBLE-MIB Net-SNMP agent reports via queries to the 1.3.6.1.4.1.2021 section of the MIB. All below this OID has structure: .1 -- index. table's index numbers for each of the DIRECTIVES below. .2 -- name. name of given entry. ought to be unique .100 -- errorFlag. int 1 if entry in error .101 -- errorMsg. DISPLAY-STRING describing error if 1. .102 -- errorFix. if 1 and errorFlag==1 exec the program named in config.h DIRECTIVES proc NAME [MAX [MIN]] if ps -e dont show process NAME, then set .100=1 and set .101 procfix NAME PROG ARGS run this command when .101:=1 exec [MIBNUM] NAME PROG ARGS run this command and .100:=exitcode .101=first-line-of-stdout. if MIBNUM (numeric) given, MIBNUM.100.0:=exitcode and MIBNUM.101.1=stdout-line-1 MIBNUM.101.2=stdout-line-2 etc execfix NAME PROG ARGS run when .102:=1 disk PATH [MINSPACE|MINPERCENT%] if diskspace<min(kb) or min%(%) .100:=1 and .101:=msg includeAllDisks MINPERCENT% load MAX1 [MAX5 [MAX15]] load average 1 5 15 minutes average>max set .100:=1 etc file FILE [MAXSIZE] kbytes. 20 files can be monitored. global errors are in .101.1.100 .101. SUB-AGENTS AGENTX master agentx AgentXSocket addr listen address. default /var/agentx/master. eg localhost:705 AgentXTimeout timeout. default 1 second AgentXRetries retries. default 5 SMUX DYNAMICALLY LOADABLE MODULES dlmod NAME FILENAME expects to find in abs file FILENAME a routine init_NAME compile FILENAME as .so -fPIC -shared for debug try launch: snmpd -f -L -Ddlmod,<NAME> ACCESS CONTROL rouser USER [noauth|auth|priv [OID]] rwuser ditto wrappers for group, access, and view directives rocommunity COMMUNITY [SOURCE [OID]] rwcommunity ditto wrappers for com2sec, group, access, and view com2sec NAME SOURCE COMMUNITY source/community to security name mapping. first matching entry used. SOURCE: hostname, subnet (IP/MASK or IP/BITS), "default" group NAME MODEL SECURITY securitymodel/securityname to group map. MODEL: v1, v2c, usm access NAME CONTEXT MODEL LEVEL PREFX READ WRITE NOTIFY map group/security model/security level to a view. MODEL: any, v1, v2c, usm LEVEL: noauth, auth, priv PREFX: exact or prefix. match of CONTEXT against incoming pdu READ, WRITE and NOTIFY are views view NAME TYPE SUBTREE [MASK] define a view. can repeat on same name. TYPE included, excluded MASK hexoctet.hexoctet... or hexoctet:hexoctet:... bitmask to apply bit by bit from left to each oid number (eg ... .1 80) IPv6 version: com2sec6 rocommunity6 rwcommunity6 example: from localhost only, rw all, community name: powermp com2sec mylocal localhost powermp group myrwgroup any mylocal view all included .1 80 access myrwgroup "" any noauth 0 mylocal mylocal mylocal example: readonly community: public com2sec notConfigUser default public group notConfigGroup v1 notConfigUser group notConfigGroup v2c notConfigUser view systemview included .1.3.6.1.2.1.1 view systemview included .1.3.6.1.2.1.25.1.1 access MyRWGroup "" any noauth 0 all all all DISMAN-EVENT-MIB for sending traps on errors. buggy. generated once ("edge not level"). agentSecName NAME a rouser name to be used for scanning for trap event. monitor [OPTIONS] NAME EXPRESSION monitor yourself. EXPRESSION: oid !=, ==, <, <=, >, >= integer for -t?: oid low high NAME your arbitrary name -t: threshold ie trap if value>high or value<low. -r FREQUENCY: each F seconds. default 600 -u SECNAME: a rouser name to be used for scanning for trap event. -o OID: include this value in trap call -e EVENTNAME: name of notificationEvent notificationEvent NAME NOTIFICATIONOID [[-w] OID_OBJECT ...] event to attach to a monitor -e NAME. example: rouser me monitor -u me -o sysUpTime.0 -o hrSWRunName "biggie" hrSWRunPerfMem > 10000 check hrSWRunPerfTable of running processes and send out trap for any using over 10M of memory. snmptrapd would produce eg: 2002-04-05 13:33:53 localhost.localdomain [udp:127.0.0.1:32931]:sysUpTimeInstance = Timeticks: (1629) 0:00:16.29 snmpTrapOID.0 = OID: mteTriggerFired mteHotTrigger = biggie mteHotTargetName = mteHotContextName = mteHotOID = OID: hrSWRunPer fMem.1968 mteHotValue = 28564 hrSWRunName.1968 = "xemacs" SETTING SYSTEM INFORMATION syslocation STRING syscontact STRING sysname STRING these objects usually rw. setting them makes them ro. PASS-THROUGH CONTROL pass MIBOID EXEC #--man snmp.conf /etc/snmp/snmp.conf -- not found on pmp6 mibdirs [+]mib-dir:... replace or add to PATH to look for mibs mibs [+]mib-token:... or ALL mibfile file #--snmpd -c configfile -C no default config -d dump hex packets -Dtoken debug print for token. -D for all. -V Symbolically dump SNMP transactions -f dont fork -g gid run as group -u uid -Lf<file> log to file -r dont need to be root -X run as AgentX subagent [udp|tcp:]hostname[:port] listen here instead of udp:161 [unix:]pathname #---/usr/share/snmp/mibs/ #--man snmptrapd receives and logs SNMP TRAPs #--snmpwalk If you are unsure of the correct row number within a specific table, snmpwalk -v 2c -c public -m ALL localhost prNames -m MIBLIST -c community -v 1 | 2c | 3 -d Dump packets #--dump configured mibs. doesnt query snmp, just reads config files snmptranslate oid -Td Print full details of the specified OID. -Tp Print a graphical tree, rooted at the specified OID. -Ta Dump the loaded MIB in a trivial form. -Tl Dump a labeled form of all objects. -To Dump a numeric form of all objects. -Ts Dump a symbolic form of all objects. -Tt Dump a tree form of the loaded MIBs (mostly useful for -On print numeric oid -IR snmptranslate -Tl | pg # .iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).ucdavis(2021).ucdExperimental(13).lmSensors(16).lmSensorsMIB(1) snmptranslate -Tos #.1.3.6.1.4.1.2021.13.16 #.iso.org.dod.internet.private.enterprises.ucdavis.ucdExperimental.lmSensors #--------------------------------------------------------------------- #--play. try get sensors to be read # need to scan and init sensors: sensors-detect # perl script, writes file: /etc/sysconfig/lm_sensors # on pentxm(-1) get in this file (plus comments) cat >>/etc/sysconfig/lm_sensors <<\! # Generated by sensors-detect on Thu Aug 17 16:22:48 2006 MODULE_0=i2c-i801 MODULE_1=adm1021 ! # seems to be running by default: chkconfig --list lm_sensors lm_sensors 0:off 1:off 2:on 3:on 4:on 5:on 6:off $ sensors max1617-i2c-0-29 Adapter: SMBus I801 adapter at 1880 Board: +34?C (low = -55?C, high = +127?C) CPU: +30?C (low = -55?C, high = +127?C) # need to permit access to default view else get: # LM-SENSORS-MIB::lmSensors = No more variables left in this MIB View... # lmSensors is .1.3.6.1.4.1.2021.13.16 echo 'view systemview included .1.3.6.1.4.1.2021.13' >mysnmpd.conf snmpd -f -r -D -V -c mysnmpd.conf udp:16000 >log 2>&1 & tail -f log & # snmpwalk -d -v 2c -c public -m ALL udp:16000 lmSensors snmpwalk -v 2c -c public -m ALL udp:16000 lmSensors node1:~ $ snmpwalk -v 2c -c public -m ALL udp:16000 lmSensors LM-SENSORS-MIB::lmMiscSensorsIndex.1 = INTEGER: 0 LM-SENSORS-MIB::lmMiscSensorsIndex.2 = INTEGER: 1 LM-SENSORS-MIB::lmMiscSensorsIndex.3 = INTEGER: 2 LM-SENSORS-MIB::lmMiscSensorsDevice.1 = STRING: Board LM-SENSORS-MIB::lmMiscSensorsDevice.2 = STRING: CPU LM-SENSORS-MIB::lmMiscSensorsDevice.3 = STRING: alarms LM-SENSORS-MIB::lmMiscSensorsValue.1 = Gauge32: 34000 LM-SENSORS-MIB::lmMiscSensorsValue.2 = Gauge32: 31000 LM-SENSORS-MIB::lmMiscSensorsValue.3 = Gauge32: 128000 LM-SENSORS-MIB::lmSensors = No more variables left in this MIB View (It is past the end of the MIB tree) # load some library. dont need for lmsensors, compiled in if false then echo dlmod sensors /usr/lib/libsensors.so.3 >~/snmpd.conf snmpd -c ~/snmpd.conf -f -r -D -V udp:16000 >log 2>&1 & # dlmod: dlmod_load_module sensors: /usr/lib/libsensors.so.3 # dlsym failed: can't find 'init_sensors' else ldd /usr/sbin/snmpd|grep sensors # libsensors.so.3 => /usr/lib/libsensors.so.3 (0x00111000) fi # list compiled in options and mibs snmpd -Dmib_init -H 2>&1 | pg # mib_init: initializing: lmSensors #--enterprise private numbers http://dragon/phpwiki/index.php/SNMP http://www.iana.org/assignments/enterprise-numbers (2Mbytes) ask for new id: http://www.iana.org/cgi-bin/enterprise.pl 20885 Thales Computers Gerard Cristau gcr at thalescomputers.fr D.J. Barrow Linux kernel developer email: dj_barrow at ariasoft.ie email(work) denis.barrow at thalescomputers.fr Work: +33-498-163412 Home: +353-22-47196. Mobile (IRL) +353-(0)86 1715438 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
