net-snmp常见的两个错误及解决办法

第一个：
Warning: noaccess control information configured.

  It's unlikely this agent can serve any usefulpurpose in this state.

  Run "snmpconf -g basic_setup" tohelp you configure the snmpd.conf file for this agent.

   这个错误是找不到配置文件，解决办法有两个：

   1、  在该放配置文件的目录下没有放配置文件，配置目录在net-snmp-config.h中

        #define SNMPLIBPATH "/usr/lib"

#define SNMPSHAREPATH "/usr/share/snmp"

#define SNMPCONFPATH "/usr/etc/snmp"

#define SNMPDLMODPATH "/usr/lib/snmp/dlmod"

        查看这几个目录下是否有snmpd.conf文件，如果没有就加上；

   2、差不多，就是目录问题，将配置文件的目录改变，然后让其能找到配置文件，也是上述位置的几个宏

       比如我改成下面这个样子：

#define SNMPLIBPATH "/lib"

#define SNMPSHAREPATH "/tmp"

#define SNMPCONFPATH "/tmp"

#define SNMPDLMODPATH "/tmp/dlmod"

第二个：

找不到相应模块出现如下错误提示：

Cannot findmodule (IP-MIB): At line 0 in (none)

Cannot findmodule (IF-MIB): At line 0 in (none)

Cannot findmodule (TCP-MIB): At line 0 in (none)

Cannot findmodule (UDP-MIB): At line 0 in (none)

Cannot findmodule (HOST-RESOURCES-MIB): At line 0 in (none)

Cannot findmodule (SNMPv2-MIB): At line 0 in (none)

Cannot findmodule (SNMPv2-SMI): At line 0 in (none)

Cannot findmodule (NOTIFICATION-LOG-MIB): At line 0 in (none)

Cannot findmodule (UCD-SNMP-MIB): At line 0 in (none)

Cannot findmodule (UCD-DEMO-MIB): At line 0 in (none)

Cannot findmodule (SNMP-TARGET-MIB): At line 0 in (none)

Cannot findmodule (NET-SNMP-AGENT-MIB): At line 0 in (none)

Cannot findmodule (SNMP-VIEW-BASED-ACM-MIB): At line 0 in (none)

Cannot findmodule (SNMP-COMMUNITY-MIB): At line 0 in (none)

Cannot findmodule (NET-SNMP-PASS-MIB): At line 0 in (none)

Cannot findmodule (NET-SNMP-EXTEND-MIB): At line 0 in (none)

Cannot findmodule (UCD-DLMOD-MIB): At line 0 in (none)

Cannot findmodule (SNMP-FRAMEWORK-MIB): At line 0 in (none)

Cannot findmodule (SNMP-MPD-MIB): At line 0 in (none)

Cannot findmodule (SNMP-USER-BASED-SM-MIB): At line 0 in (none)

Cannot findmodule (SNMP-NOTIFICATION-MIB): At line 0 in (none)

Cannot findmodule (SNMPv2-TM): At line 0 in (none)

这里也有两种情况：

一个是设置好系统环境变量，这个网上都有；

第二个也是net-snmp-config.h的配置文件中的问题：

#define DEFAULT_MIBDIRS "$HOME/.snmp/mibs:/usr/share/snmp/mibs:/tmp/snmp/mibs"

如果不愿意设置环境变量，那么就修改这里，然后编译，再调用静态库编译新的agent就可以了，当然，如果不是移植，那更简单，只要修改这里就可以了

NOTE：

新编译的agent是否更换了静态库，上述几个修改的地方是与库有关；agent端修改net-snmp-config.h文件无效；

by stephen 2013#07#18