1、安装snmp及本地mib库

apt-get install snmp snmp-mibs-downloader

2、获取接口带宽：

snmpwalk -v 2c -c community 1.1.1.1 ifInOctets.55 |awk  '{print $NF}'

-v  1|2c|3 指定SNMP协议版本

-c  COMMUNITY 指定共同体字符串

3、带宽计算：

providing an example is a good idea.

time= 60 seconds

Diff. Inoctets = 1427697887 - 1427402450 = 295437 octets received in 60 seconds

1 octet = 8 bits

average bit rate = Diff.InOcoctets*8/60 =

39391,6 bps

so the usage is :

39391,6 / 1544000 = 2,55 % usage of BW inbound direction

you can perform a similar calculation for outbound direction

4、报错：ifOutOctets.55: Unknown Object Identifier (Sub-id not found: (top) -> ifOutOctets)

修改本地配置，vim /etc/snmp/snmp.conf

注释#mibs

来源：https://blog.csdn.net/wang1144/article/details/52399589