Getting router information via SNMP

Created by Yuriy Andamasov, Modified on Wed, 17 Jan at 4:42 PM by Srividya Anantapatnaikuni

Article review date	2024-01-17
Validated for VyOS versions	1.2.5, 1.3.5, 1.4.0, 1.5.x

To get data via SNMP you need to know OID (Object IDentificator) or MIB (Management Information Base).

All available MIBs/OIDs possible to get via snmpwalk, as an example

#snmpwalk -v -c
#snmpwalk -v2c -c somecommunity 198.51.100.1

Frequently used OIDs:

CPU usage

percentage of user CPU time: .1.3.6.1.4.1.2021.11.9.0
percentages of system CPU time: .1.3.6.1.4.1.2021.11.10.0
percentages of idle CPU time: .1.3.6.1.4.1.2021.11.11.0
raw user cpu time: .1.3.6.1.4.1.2021.11.50.0
raw system cpu time: .1.3.6.1.4.1.2021.11.52.0
raw idle cpu time: .1.3.6.1.4.1.2021.11.53.0

Load Average

1 minute Load: .1.3.6.1.4.1.2021.10.1.3.1
5 minute Load: .1.3.6.1.4.1.2021.10.1.3.2
15 minute Load: .1.3.6.1.4.1.2021.10.1.3.3

Memory Statistics

Total RAM in machine: .1.3.6.1.4.1.2021.4.5.0
Total RAM used: .1.3.6.1.4.1.2021.4.6.0
Total RAM Free: .1.3.6.1.4.1.2021.4.11.0
Total Swap Size: .1.3.6.1.4.1.2021.4.3.0
Available Swap Space: .1.3.6.1.4.1.2021.4.4.0