Cisco IOS Cookbook, 2nd Edition

Configuring SNMP

Problem

You want to set up basic SNMP services on a router.

Solution

To enable read-only SNMP services, use the following configuration command:

Router#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#snmp-server community ORARO ro
Router(config)#end
Router#

To enable read-write SNMP services, use the following command:

Router#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#snmp-server community ORARW rw
Router(config)#end
Router#

Warning

It is extremely risky to enable read-write SNMP services without the appropriate security controls. Please read the following discussion section before implementing this recipe.

Starting with IOS Version 12.0(3)T, Cisco introduced a new system for configuring SNMP services by using the snmp-server group and snmp-server user configuration commands. Use the following commands to enable read-only SNMP services with this new method:

Router#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#snmp-server group COOKRO v1 
Router(config)#snmp-server user TESTRO1 COOKRO v1
Router(config)#snmp-server group BOOKRO v2c
Router(config)#snmp-server user TESTRO2 BOOKRO v2c
Router(config)#end

Discussion

SNMP services are disabled by default on all Cisco routers. The examples highlighted in the solutions section show only how to configure the router to allow inbound SNMP services so that it will respond to SNMP Get and Set ...