SNMP配置问题

城市流浪人

mrtg配置老是不成功，搞了好久，还没有结果，向大家请教一下！


    我的交换机配置如下：
   snmp-agent
snmp-agent local-engineid 800063A2000FE28155AC6877
snmp-agent community write public
snmp-agent sys-info version all
snmp-agent group v3 managev3group write-view internet
snmp-agent target-host trap address udp-domain 192.168.30.40 udp-port 500 params securityname public
snmp-agent mib-view included internet internet
snmp-agent usm-user v3 managev3user managev3group


   mrtg报错如下：
  C:\mrtg\bin>perl cfgmaker public@192.168.30.1:5000  --global "WorkDir: c:/wwwroot/MRTG" --output mrtg.cfg
SNMP Error:
receiving response PDU: Unknown error
SNMPv1_Session (remote host: "192.168.30.1" [192.168.30.1].5000)
                  community: "public"
                 request ID: 72620869
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
at C:/mrtg/bin\..\lib\mrtg2/SNMP_util.pm line 627
SNMPWALK Problem for 1.3.6.1.2.1.1 on public@192.168.30.1:5000:::::v4only
at cfgmaker line 940
WARNING: Skipping public@192.168.30.1:5000 as no info could be retrieved



                    希望那位大哥，指点一下，那里有不对的地方！