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IF-MIB query doesn't work on my board running net-snmp 5.7.3 - Help??
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From: Murali K. <m-k...@ti...> - 2016-11-09 17:14:45
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Hi, Users, On 11/08/2016 10:18 AM, Murali Karicheri wrote: > Does Linux support if-mib (new version of ifTable) or do we have to use old version (mibII/interfaces? > > >From the README.agent-mibs, I gather the following:- IF-MIB ifNumber.0 U $2 ~3.2 O mibII/interfaces.c ifTableLastChange.0 --- ifTable (old) U $2 ~3.5 O mibII/interfaces.c ifTable (new) L 5.2 M if-mib/ifTable/* ifTable (new) FOS 5.4 M if-mib/ifTable/* ifXTable L 5.2 M if-mib/ifXTable/* ifXTable FOS 5.4 M if-mib/ifXTable/* ifStackLastChange.0 --- ifStackTable --- ifTestTable --- ifRcvAddressTable --- So it looks like ifTable (new) and ifXTable are supported in Linux. Also by running the net-snmp manually using -Dmib_init -H, I can see IF-MIB is getting loaded. Some reason, a query to the target from a Linux PC returns me no MIB. I see following logs at the Linux PC:- snmpwalk -v 2c -c public <IP address of target board> interfaces 2>/dev/null IF-MIB::interfaces = No more variables left in this MIB View (It is past the end of the MIB tree) At the target I invoked snmpd with -d option to see the packets coming in and going out as below. Also made sure the ifTable and ifXTable MIBs are loaded. Do you know what else is missing to allow querying IF-MIB.. Also updated the /etc/snmp/snmpd.conf to enable access to the specific MIBs as below. I am assuming my snmpd.conf is not setup properly to allow this query to go through, but I can't figure what is wrong. I appreciate any suggestions to get this functional on my board. Here is my /etc/snmp/snmpd.conf # sec.name source community com2sec paranoid default public #com2sec readonly default public #com2sec readwrite default private #### # Second, map the security names into group names: # sec.model sec.name group MyROSystem v1 paranoid group MyROSystem v2c paranoid group MyROSystem usm paranoid group MyROGroup v1 readonly group MyROGroup v2c readonly group MyROGroup usm readonly group MyRWGroup v1 readwrite group MyRWGroup v2c readwrite group MyRWGroup usm readwrite #### # Third, create a view for us to let the groups have rights to: # incl/excl subtree mask view all included .1 80 view system included .iso.org.dod.internet.mgmt.mib-2.system view intf included .iso.org.dod.internet.mgmt.mib-2.31 view intfold included .iso.org.dod.internet.mgmt.mib-2.interfaces #### # Finally, grant the 2 groups access to the 1 view with different # write permissions: # context sec.model sec.level match read write notif access MyROSystem "" any noauth exact system none none access MyROSystem "" any noauth exact intf none none access MyROSystem "" any noauth exact intfold none none access MyROGroup "" any noauth exact all none none access MyRWGroup "" any noauth exact all all none Here is the hex dump of messages for the query. NET-SNMP version 5.7.3 Received 41 byte packet from UDP: [158.218.103.164]:50197->[158.218.103.63]:161 0000: 30 27 02 01 01 04 06 70 75 62 6C 69 63 A1 1A 02 0'.....public... 0016: 04 31 F3 56 84 02 01 00 02 01 00 30 0C 30 0A 06 .1.V.......0.0.. 0032: 06 2B 06 01 02 01 02 05 00 .+....... Sending 41 bytes to UDP: [158.218.103.164]:50197->[158.218.103.63]:161 0000: 30 27 02 01 01 04 06 70 75 62 6C 69 63 A2 1A 02 0'.....public... 0016: 04 31 F3 56 84 02 01 00 02 01 00 30 0C 30 0A 06 .1.V.......0.0.. 0032: 06 2B 06 01 02 01 02 82 00 .+....... Also verified if-mib (ifTable and ifXTable) is loaded by invoking.. root@am57xx-evm:~# snmpd -f -Le -d -Dmib_init -H registered debug token mib_init, 1 mib_init: initializing: usmConf mib_init: initializing: iquery mib_init: initializing: vacm_conf mib_init: initializing: snmpMPDStats_5_5 mib_init: initializing: usmStats_5_5 mib_init: initializing: snmpEngine mib_init: initializing: usmUser mib_init: initializing: snmp_mib_5_5 mib_init: initializing: system_mib mib_init: initializing: sysORTable mib_init: initializing: vacm_vars mib_init: initializing: setSerialNo mib_init: initializing: at mib_init: initializing: ip mib_init: initializing: tcp mib_init: initializing: icmp mib_init: initializing: udp mib_init: initializing: ipv6 mib_init: initializing: disk_hw mib_init: initializing: proc mib_init: initializing: versioninfo mib_init: initializing: pass mib_init: initializing: pass_persist mib_init: initializing: loadave mib_init: initializing: extend mib_init: initializing: errormib mib_init: initializing: file mib_init: initializing: dlmod mib_init: initializing: proxy mib_init: initializing: logmatch mib_init: initializing: memory mib_init: initializing: vmstat mib_init: initializing: snmpNotifyTable mib_init: initializing: snmpNotifyFilterProfileTable mib_init: initializing: notification_log mib_init: initializing: target_counters_5_5 mib_init: initializing: snmpTargetAddrEntry mib_init: initializing: snmpTargetParamsEntry mib_init: initializing: nsTransactionTable mib_init: initializing: nsModuleTable mib_init: initializing: nsDebug mib_init: initializing: nsCache mib_init: initializing: nsLogging mib_init: initializing: nsVacmAccessTable mib_init: initializing: mteScalars mib_init: initializing: mteTrigger mib_init: initializing: mteTriggerTable mib_init: initializing: mteTriggerDeltaTable mib_init: initializing: mteTriggerExistenceTable mib_init: initializing: mteTriggerBooleanTable mib_init: initializing: mteTriggerThresholdTable mib_init: initializing: mteTriggerConf mib_init: initializing: mteEvent mib_init: initializing: mteEventTable mib_init: initializing: mteEventSetTable mib_init: initializing: mteEventNotificationTable mib_init: initializing: mteEventConf mib_init: initializing: mteObjects mib_init: initializing: mteObjectsTable mib_init: initializing: mteObjectsConf mib_init: initializing: schedCore mib_init: initializing: schedConf mib_init: initializing: schedTable mib_init: initializing: override mib_init: initializing: hrh_storage mib_init: initializing: hrh_filesys mib_init: initializing: hrSWInstalledTable mib_init: initializing: hrSWRunTable mib_init: initializing: hr_system mib_init: initializing: hr_device mib_init: initializing: hr_other mib_init: initializing: hr_proc mib_init: initializing: hr_network mib_init: initializing: hr_print mib_init: initializing: hr_disk mib_init: initializing: hr_partition mib_init: initializing: ifTable mib_init: initializing: ifTable mib_init: initializing: ifXTable mib_init: initializing: ifXTable mib_init: initializing: tcpConnectionTable mib_init: initializing: tcpConnectionTable mib_init: initializing: tcpListenerTable mib_init: initializing: tcpListenerTable mib_init: initializing: udpEndpointTable mib_init: initializing: udpEndpointTable mib_init: initializing: vacm_context mib_init: initializing: var_route mib_init: initializing: tcpTable mib_init: initializing: udpTable mib_init: initializing: ip_scalars mib_init: initializing: snmpNotifyFilterTable mib_init: initializing: snmpNotifyFilterTable mib_init: initializing: swinst mib_init: initializing: swrun mib_init: initializing: hrSWRunPerfTable mib_init: initializing: interface mib_init: initializing: ipAddressTable mib_init: initializing: ipAddressTable mib_init: initializing: ipAddressPrefixTable mib_init: initializing: ipAddressPrefixTable mib_init: initializing: ipDefaultRouterTable mib_init: initializing: ipDefaultRouterTable mib_init: initializing: inetNetToMediaTable mib_init: initializing: inetNetToMediaTable mib_init: initializing: ipSystemStatsTable mib_init: initializing: ipSystemStatsTable mib_init: initializing: ipv6ScopeZoneIndexTable mib_init: initializing: ipv6ScopeZoneIndexTable mib_init: initializing: ipIfStatsTable mib_init: initializing: ipIfStatsTable mib_init: initializing: ipCidrRouteTable mib_init: initializing: ipCidrRouteTable mib_init: initializing: inetCidrRouteTable mib_init: initializing: inetCidrRouteTable mib_init: initializing: hw_fsys mib_init: initializing: hw_mem mib_init: initializing: cpu mib_init: initializing: cpu_linux Configuration directives understood: === cut rest of the logs ========= -- Murali Karicheri Linux Kernel, Keystone |
