Cisco - Configuring/Verifying SNMP Setting

 

Enable SNMP Community Strings

 

This procedure is the same for both routers and Cisco IOS software-based XL Catalyst Switches.

 

1.Telnet to the router/Switch:

 

prompt #telnet 10.0.0.2

 

2. Enter the enable password at the prompt in order to enter the enable mode:

 

Router>enable

Password:

Router#

 

3. Display the running configuration and look for the SNMP information:

 

Router#show running-config

Building configuration...

....

....

 

Note: If no SNMP information is present, continue with these steps. If any SNMP commands are listed, you can modify or disable them.

 

4. Go into the configuration mode:

 

Router#configure terminal

 

Enter configuration commands, one per line.  End

with CNTL/Z.

Router(config)#

 

5. Use this command in order to enable the Read-only (RO) community string:

 

Router(config)#snmp-server community public RO

 

where "public" is the Read-only community string.

 

6. Use this command in order to enable the Read-write (RW) community string:

 

Router(config)#snmp-server community private RW

 

where "private" is the Read-write community string.

 

7.Exit out of the configuration mode and return to the main prompt:

 

Router(config)#exit

Router#

 

8.Write the modified configuration to nonvolatile RAM (NVRAM) to save the settings:

 

Router#write memory

Building configuration...

[OK]

Router#

 

 

Verifying SNMP Community Strings

 

Here is how to verify SNMP community strings.

 

1.Telnet to the router:

 

prompt# telnet 10.0.0.2

 

2. Enter the enable password at the prompt in order to enter the enable mode:

 

Router>enable

Password:

Router#

 

3. Display the running configuration and look for the SNMP information:

 

Router#show running-config

....

....

snmp-server community public RO

snmp-server community private RW

....

....In this sample output, "public" is the read-only community string and "private" is the read-write community string.

Note: If you do not see any "snmp-server" statements, SNMP is not enabled on the router.

 

Alternatively, execute the show snmp command in the enable mode.

If you see this message, it also indicates that SNMP is not enabled on the router:

 

Router#show snmp

%SNMP agent not enabled

Router#

 

4. Exit out of the enable mode and return to the main prompt:

 

Router#disable

Router>

 

 

Disable/Remove SNMP Community Strings

 

1.In order to disable/remove the current Read-only (RO) community string, use this command:

 

Router(config)#no snmp-server community public RO

 

where "public" is the Read-only community string

 

2.In order to disable/remove the current Read-write (RW) community string, use this command:

 

Router(config)#no snmp-server community private RW

 

where "private" is the Read-write community string

 

3.Exit out of the configuration mode and return to the main prompt:

 

Router(config)#exit

Router#

 

4.Write the modified configuration to nonvolatile RAM (NVRAM) to save the settings:

 

Router#write memory

Building configuration...

[OK]

Router#