SNMP 协议
larkguo@gmail.com
2007-05-26
目录
1 简介...........................................................................................................................................3
1.1 概况...........................................................................................................................3
1.2 名词...........................................................................................................................3
1.3 模型...........................................................................................................................3
2 组成...........................................................................................................................................4
2.1 SMI.............................................................................................................................5
2.1.1.1 数据类型................................................................................................5
2.1.1.2 Message...................................................................................................6
2.1.1.3 BER...........................................................................................................6
2.2 MIB...........................................................................................................................12
2.2.1 UDP组...............................................................................................................14
2.2.1.1 实例标识..............................................................................................15
2.2.2 system组.........................................................................................................17
2.2.3 interface组...................................................................................................17
2.2.4 at组.................................................................................................................17
2.2.5 ip组.................................................................................................................17
2.2.6 icmp组.............................................................................................................17
2.2.7 tcp组...............................................................................................................17
2.3 SNMP.........................................................................................................................18
2.3.1 端口.................................................................................................................18
2.3.2 结构.................................................................................................................18
2.3.2.1 PDU.........................................................................................................22
2.3.2.2 Trap-PDU...............................................................................................23
2.3.3 过程.................................................................................................................24
2.3.3.1 Manager.................................................................................................25
2.3.3.2 Agent.....................................................................................................25
3 应用.........................................................................................................................................26
3.1 snmpget...................................................................................................................26
3.2 snmptrap.................................................................................................................27
4 附录.........................................................................................................................................28
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