交换机MIB库中 MIB字符串对应的中文意思：
ifIndex 端口索引号
ifDescr 端口描述
ifType 端口类型
ifMtu 最大传输包字节数
ifSpeed 端口速度
ifPhysAddress 物理地址
ifOperStatus 操作状态
ifLastChange 上次状态更新时间与流量相关的MIB字符串对应的中文意思：
ifInOctets 输入字节数 ifOutOctets 输出字节数
ifInUcastPkts 输入非广播包数 ifOutUcastPkts 输出非广播包数
ifInNUcastPkts 输入广播包数 ifOutNUcastPkts 输出广播包数
ifInDiscards 输入包丢弃数 ifOutDiscards 输出包丢弃数
ifInErrors 输入包错误数 ifOutErrors 输出包错误数如何实现使用SNMP监控交换机端口带宽？
监控交换机端口带宽实际上就是监控端口入流量和出流量信息，若要监控端口流量信息就需要使用ifInOctets和ifOutOctets字符串；具体使用格式如下（手动获取端口流量,其中testPublic是community社区名称）：
[root@localhost ~]# snmpwalk -v 2c -c testPublic 172.16.100.1 ifInOctets
IF-MIB::ifInOctets.1 = Counter32: 0
IF-MIB::ifInOctets.2 = Counter32: 0
IF-MIB::ifInOctets.3 = Counter32: 0
IF-MIB::ifInOctets.4 = Counter32: 0
IF-MIB::ifInOctets.6 = Counter32: 1619025492
IF-MIB::ifInOctets.7 = Counter32: 2463331598
IF-MIB::ifInOctets.8 = Counter32: 3630545960
IF-MIB::ifInOctets.9 = Counter32: 2570129655
IF-MIB::ifInOctets.10 = Counter32: 0
IF-MIB::ifInOctets.11 = Counter32: 2308743436
IF-MIB::ifInOctets.12 = Counter32: 401489415
IF-MIB::ifInOctets.13 = Counter32: 0
IF-MIB::ifInOctets.14 = Counter32: 0
IF-MIB::ifInOctets.15 = Counter32: 0
IF-MIB::ifInOctets.16 = Counter32: 1555109398
IF-MIB::ifInOctets.17 = Counter32: 0
IF-MIB::ifInOctets.18 = Counter32: 38671
IF-MIB::ifInOctets.19 = Counter32: 0
IF-MIB::ifInOctets.20 = Counter32: 0
IF-MIB::ifInOctets.21 = Counter32: 0
IF-MIB::ifInOctets.22 = Counter32: 0
IF-MIB::ifInOctets.23 = Counter32: 0
IF-MIB::ifInOctets.24 = Counter32: 0
IF-MIB::ifInOctets.25 = Counter32: 0
IF-MIB::ifInOctets.26 = Counter32: 3644608740
IF-MIB::ifInOctets.27 = Counter32: 0
IF-MIB::ifInOctets.28 = Counter32: 0
IF-MIB::ifInOctets.29 = Counter32: 2397532255
IF-MIB::ifInOctets.30 = Counter32: 0
IF-MIB::ifInOctets.31 = Counter32: 0
IF-MIB::ifInOctets.32 = Counter32: 0
IF-MIB::ifInOctets.33 = Counter32: 0
IF-MIB::ifInOctets.34 = Counter32: 0
IF-MIB::ifInOctets.35 = Counter32: 0
IF-MIB::ifInOctets.36 = Counter32: 0
IF-MIB::ifInOctets.37 = Counter32: 0
IF-MIB::ifInOctets.38 = Counter32: 0
IF-MIB::ifInOctets.39 = Counter32: 0
IF-MIB::ifInOctets.40 = Counter32: 0
IF-MIB::ifInOctets.41 = Counter32: 0
IF-MIB::ifInOctets.42 = Counter32: 0
IF-MIB::ifInOctets.43 = Counter32: 4082357090
IF-MIB::ifInOctets.44 = Counter32: 1905708319
IF-MIB::ifInOctets.45 = Counter32: 0
IF-MIB::ifInOctets.46 = Counter32: 0
IF-MIB::ifInOctets.47 = Counter32: 0
IF-MIB::ifInOctets.48 = Counter32: 0
IF-MIB::ifInOctets.49 = Counter32: 0
IF-MIB::ifInOctets.50 = Counter32: 0
IF-MIB::ifInOctets.51 = Counter32: 2710232851
IF-MIB::ifInOctets.52 = Counter32: 0从上面可以看到，可以获取到52个接口的信息。那么，这就结束了？当然不是，实际上按照这个接口信息去统计流量信息是不正确的；因为这个交换机只有24个ethernet接口，8个光口，也就是说这个交换机实际的物理接口总共32个。但现在得到的接口却是52个，明显不正确。这种情况下该如何判断使用snmpwalk命令得到的接口相对应的物理接口是哪个？
这个时候可以使用ifDescr进行查看然后与上面的比对就可以知道了，具体用法如下（其中testPublic是community社区名称）：
[root@localhost ~]# snmpwalk -v 2c -c testPublic 172.16.100.1 ifDescr
IF-MIB::ifDescr.1 = STRING: InLoopBack0
IF-MIB::ifDescr.2 = STRING: NULL0
IF-MIB::ifDescr.3 = STRING: Console9/0/0
IF-MIB::ifDescr.4 = STRING: MEth0/0/1
IF-MIB::ifDescr.6 = STRING: GigabitEthernet0/0/1
IF-MIB::ifDescr.7 = STRING: GigabitEthernet0/0/2
IF-MIB::ifDescr.8 = STRING: GigabitEthernet0/0/3
IF-MIB::ifDescr.9 = STRING: GigabitEthernet0/0/4
IF-MIB::ifDescr.10 = STRING: GigabitEthernet0/0/5
IF-MIB::ifDescr.11 = STRING: GigabitEthernet0/0/6
IF-MIB::ifDescr.12 = STRING: GigabitEthernet0/0/7
IF-MIB::ifDescr.13 = STRING: GigabitEthernet0/0/8
IF-MIB::ifDescr.14 = STRING: GigabitEthernet0/0/9
IF-MIB::ifDescr.15 = STRING: GigabitEthernet0/0/10
IF-MIB::ifDescr.16 = STRING: GigabitEthernet0/0/11
IF-MIB::ifDescr.17 = STRING: GigabitEthernet0/0/12
IF-MIB::ifDescr.18 = STRING: GigabitEthernet0/0/13
IF-MIB::ifDescr.19 = STRING: GigabitEthernet0/0/14
IF-MIB::ifDescr.20 = STRING: GigabitEthernet0/0/15
IF-MIB::ifDescr.21 = STRING: GigabitEthernet0/0/16
IF-MIB::ifDescr.22 = STRING: GigabitEthernet0/0/17
IF-MIB::ifDescr.23 = STRING: GigabitEthernet0/0/18
IF-MIB::ifDescr.24 = STRING: GigabitEthernet0/0/19
IF-MIB::ifDescr.25 = STRING: GigabitEthernet0/0/20
IF-MIB::ifDescr.26 = STRING: GigabitEthernet0/0/21
IF-MIB::ifDescr.27 = STRING: GigabitEthernet0/0/22
IF-MIB::ifDescr.28 = STRING: GigabitEthernet0/0/23
IF-MIB::ifDescr.29 = STRING: GigabitEthernet0/0/24
IF-MIB::ifDescr.30 = STRING: GigabitEthernet0/0/25
IF-MIB::ifDescr.31 = STRING: GigabitEthernet0/0/26
IF-MIB::ifDescr.32 = STRING: GigabitEthernet0/0/27
IF-MIB::ifDescr.33 = STRING: GigabitEthernet0/0/28
IF-MIB::ifDescr.34 = STRING: GigabitEthernet0/0/29
IF-MIB::ifDescr.35 = STRING: GigabitEthernet0/0/30
IF-MIB::ifDescr.36 = STRING: GigabitEthernet0/0/31
IF-MIB::ifDescr.37 = STRING: GigabitEthernet0/0/32
IF-MIB::ifDescr.38 = STRING: Vlanif10
IF-MIB::ifDescr.39 = STRING: Vlanif20
IF-MIB::ifDescr.40 = STRING: Vlanif30
IF-MIB::ifDescr.41 = STRING: Vlanif40
IF-MIB::ifDescr.42 = STRING: Vlanif100
IF-MIB::ifDescr.43 = STRING: Eth-Trunk1
IF-MIB::ifDescr.44 = STRING: Eth-Trunk2
IF-MIB::ifDescr.45 = STRING: Vlanif200
IF-MIB::ifDescr.46 = STRING: Vlanif21
IF-MIB::ifDescr.47 = STRING: Vlanif22
IF-MIB::ifDescr.48 = STRING: Vlanif201
IF-MIB::ifDescr.49 = STRING: Vlanif202
IF-MIB::ifDescr.50 = STRING: Vlanif23
IF-MIB::ifDescr.51 = STRING: Eth-Trunk3
IF-MIB::ifDescr.52 = STRING: Vlanif66可以看到有32个GigabitEthernet接口，8个光口也显示为GigabitEthernet的原因是这8个光口没有安装光模块，因此暂时显示为GigabitEthernet接口。
本文转自 f_066 51CTO博客，原文链接：http://blog.51cto.com/ganmu/2043635，如需转载请自行联系原作者
