snmp求助！！！各位大侠们快来啊！！救命！！！

[weixin_38066087]

cat /usr/local/net-snmp/share/snmp/snmpd.conf | grep -v "#" | grep -v "^$"
dlmod cmaX /usr/lib/libcmaX.so
rwcommunity  DNlch6Sg2nU  127.0.0.1
syscontact Root <root@localhost> (configure /etc/snmp/snmp.local.conf)
syslocation Unknown (edit /etc/snmp/snmpd.conf)
com2sec notConfigUser   125.125.125.125 SinoHNMi
com2sec notConfigUser   124.124.124.124  SinoHNMi
com2sec notConfigUser   123.123.123.123  SinoHNMi

group   notConfigGroup v1           notConfigUser
group   notConfigGroup v2c           notConfigUser
view    systemview    included   .1
view    systemview    included   .1.3.6.1.2.1.25.1.1
access  notConfigGroup ""      any       noauth    exact  systemview none none
pass .1.3.6.1.4.1.4413.4.1 /usr/bin/ucd5820stat

配置文件信息如上，ps 和netstat显示都已经开启，但是测试出现
/usr/local/net-snmp/bin/snmpwalk -v 2c -c public 127.0.0.1 if
Timeout: No Response from 127.0.0.1
另外一台机器和这个配置一样但是显示为：
/usr/local/net-snmp/bin/snmpwalk -v 2c -c public 127.0.0.1 if
snmpwalk: Failure in sendto (Sub-id not found: (top) -> if) (Operation not permitted)
为什么?能帮我解释一下吗谢谢