SNMPv2

Created by Yuriy Andamasov, Modified on Thu, 18 Jan at 5:40 PM by Srividya Anantapatnaikuni

Article review date2024-01-18
Validated for VyOS versions
1.2.5, 1.3.5, 1.4.0, 1.5.x

SNMPv2 is the original and most commonly used version.

For authorizing clients, SNMP uses the concept of communities.

Communities may have authorization set to read only (this is most common) or to read and write (this option is not actively used in VyOS).

SNMP can work synchronously or asynchronously. In synchronous communication, the monitoring system queries the router periodically. In asynchronous, the router sends notification to the "trap" (the monitoring host).

SNMPv2 does not support any authentication mechanisms, other than client source address, so you should specify addresses of clients allowed to monitor the router. Note that SNMPv2 also supports no encryption and always sends data in plain text.

Example:

# Define a community
set service snmp community routers authorization ro

# Allow monitoring access from the entire network
set service snmp community routers network 192.0.2.0/24

# Allow monitoring access from specific addresses
set service snmp community routers client 203.0.113.10
set service snmp community routers client 203.0.113.20

## Define router information
set service snmp location "UK, London"
set service snmp contact "[email protected]"

## Trap target if you want asynchronous communication
set service snmp trap-target 203.0.113.10

Was this article helpful?

That’s Great!

Thank you for your feedback

Sorry! We couldn't be helpful

Thank you for your feedback

Let us know how can we improve this article!

Select at least one of the reasons
CAPTCHA verification is required.

Feedback sent

We appreciate your effort and will try to fix the article