SNMP not working in 1.8.13 / CentOS 6.2

[hughmcl]

OS: CentOS 6.2
Zabbix Server: 1.8.13


My checks using zabbix_agent work fine. When I set up checks using SNMP, they all report as being 'not supported'. I've turned up debugging and getting the following:-

1229:20120519:230916.783 In substitute_simple_macros() data:'icmpOutSrcQuenchs'
1229:20120519:230916.783 In substitute_simple_macros() data:'HughHomeRO'
1229:20120519:230916.783 In substitute_simple_macros() data:'1.3.6.1.2.1.5.19.0'
1229:20120519:230916.783 In get_value() key:'icmpOutSrcQuenchs'
1229:20120519:230916.784 In get_value_snmp() key:'icmpOutSrcQuenchs' oid:'1.3.6.1.2.1.5.19.0'
1229:20120519:230916.784 In snmp_open_session()
1229:20120519:230916.784 SNMP [[email protected]:161]
1229:20120519:230916.784 End of snmp_open_session()
1229:20120519:230916.784 End of get_value_snmp():NOTSUPPORTED
1229:20120519:230916.785 Item [switch2:icmpOutSrcQuenchs] error: Error doing snmp_open()
1229:20120519:230916.785 In zabbix_log()
1229:20120519:230916.785 In DCconfig_get_items() hostid:0 key:'zabbix[log]'
1229:20120519:230916.785 End of DCconfig_get_items():0
1229:20120519:230916.785 End of zabbix_log()
1229:20120519:230916.785 End of get_value():NOTSUPPORTED
1229:20120519:230916.785 In activate_host() hostid:10049 itemid:22396 type:4
1229:20120519:230916.785 In substitute_simple_macros() data:'ifInOctets14'
1229:20120519:230916.786 In substitute_simple_macros() data:'HughHomeRO'
1229:20120519:230916.786 In substitute_simple_macros() data:'1.3.6.1.2.1.2.2.1.10.14'
1229:20120519:230916.786 In get_value() key:'ifInOctets14'
1229:20120519:230916.786 In get_value_snmp() key:'ifInOctets14' oid:'1.3.6.1.2.1.2.2.1.10.14'
1229:20120519:230916.786 In snmp_open_session()
1229:20120519:230916.786 SNMP [[email protected]:161]
1229:20120519:230916.787 End of snmp_open_session()
1229:20120519:230916.787 End of get_value_snmp():NOTSUPPORTED


However I know the settings are correct, because when I carry out an SNMPwalk from the command-line I get a value back:-

[root@monitoring tmp]# snmpwalk -v2c -c HughHomeRO 10.1.2.3 1.3.6.1.2.1.5.19.0
IP-MIB::icmpOutSrcQuenchs.0 = Counter32: 0
[root@monitoring tmp]# snmpwalk -v2c -c HughHomeRO 10.1.2.3 1.3.6.1.2.1.2.2.1.10.14
IF-MIB::ifInOctets.14 = Counter32: 2133637278


Any ideas what's going on?



I also know it's finding the library:-

[root@monitoring sbin]# ldd zabbix_server
linux-gate.so.1 => (0x0016c000)
libmysqlclient.so.18 => /usr/local/mysql/lib/libmysqlclient.so.18 (0x0074c000)
libcurl.so.4 => /usr/lib/libcurl.so.4 (0x00110000)
libnetsnmp.so.20 => /usr/lib/libnetsnmp.so.20 (0x00380000)
libcrypto.so.10 => /usr/lib/libcrypto.so.10 (0x0016d000)
libssh2.so.1 => /usr/lib/libssh2.so.1 (0x00ace000)
libOpenIPMI.so.0 => /usr/lib/libOpenIPMI.so.0 (0x0044b000)
libOpenIPMIposix.so.0 => /usr/lib/libOpenIPMIposix.so.0 (0x00e0d000)
libm.so.6 => /lib/libm.so.6 (0x002fa000)
libresolv.so.2 => /lib/libresolv.so.2 (0x00324000)
libc.so.6 => /lib/libc.so.6 (0x00546000)
libpthread.so.0 => /lib/libpthread.so.0 (0x0033e000)
libdl.so.2 => /lib/libdl.so.2 (0x00d16000)
librt.so.1 => /lib/librt.so.1 (0x00359000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00af4000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00362000)
libidn.so.11 => /lib/libidn.so.11 (0x006d6000)
libldap-2.4.so.2 => /lib/libldap-2.4.so.2 (0x00a19000)
libgssapi_krb5.so.2 => /lib/libgssapi_krb5.so.2 (0x00708000)
libkrb5.so.3 => /lib/libkrb5.so.3 (0x00bdf000)
libk5crypto.so.3 => /lib/libk5crypto.so.3 (0x00a66000)
libcom_err.so.2 => /lib/libcom_err.so.2 (0x00d64000)
libz.so.1 => /lib/libz.so.1 (0x00a92000)
libssl3.so => /usr/lib/libssl3.so (0x00cb5000)
libsmime3.so => /usr/lib/libsmime3.so (0x00db0000)
libnss3.so => /usr/lib/libnss3.so (0x00e13000)
libnssutil3.so => /usr/lib/libnssutil3.so (0x00aa6000)
libplds4.so => /lib/libplds4.so (0x00165000)
libplc4.so => /lib/libplc4.so (0x00ac6000)
libnspr4.so => /lib/libnspr4.so (0x00d1b000)
libssl.so.10 => /usr/lib/libssl.so.10 (0x00fb3000)
libOpenIPMIutils.so.0 => /usr/lib/libOpenIPMIutils.so.0 (0x00cef000)
libncurses.so.5 => /lib/libncurses.so.5 (0x00d69000)
libgdbm.so.2 => /usr/lib/libgdbm.so.2 (0x00cf7000)
/lib/ld-linux.so.2 (0x00f93000)
liblber-2.4.so.2 => /lib/liblber-2.4.so.2 (0x00cfe000)
libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x00d8c000)
libkrb5support.so.0 => /lib/libkrb5support.so.0 (0x00d59000)
libkeyutils.so.1 => /lib/libkeyutils.so.1 (0x00747000)
libtinfo.so.5 => /lib/libtinfo.so.5 (0x00ddb000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x00f4c000)
libselinux.so.1 => /lib/libselinux.so.1 (0x0465c000)
libfreebl3.so => /lib/libfreebl3.so (0x0526f000)

I've also done tcpdumps and I do not see the zabbix server attempting to send any UDP requests to 10.1.2.3.

Hugh

[ghoz]

try adding a dot in front of your OID :
.1.3.6.1.2.1.5.19.0 rather than 1.3.6.1.2.1.5.19.0

[kevind]

I ran into a similar problem with Zabbix 2.0.1 under CentOS 6.2 64-bit. In my case it was triggered by setting the "SourceIP" parameter in zabbix_server.conf, which stops SNMP from sending anything.

I developed a workaround, posted here:

http://www.zabbix.com/forum/showthread.php?p=105717#post105717