Network Management: Configuring SNMP on different vendor devices

On Windows PC:

The Simple Network Management Protocol (SNMP) is an application-layer protocol. SNMP can help network administrators manage network performance, find and solve network problems, and plan for network growth more easily.

On Microsoft Windows, the SNMP service can be enabled and configured .When this is done, you will be allowed to retrieve information from the Microsoft Windows OS via SNMP. Proceed as follows:

1. Install the SNMP service from the Add/Remove Programs -> Add/Remove Windows Components -> Management and Monitor Tools -> Details -> Simple Network Management Protocol.
   
2. Once the service is installed, open the 'Services' panel and locate the 'SNMP Service'.
   
3. Double click on the 'SNMP Service' to open the properties.
   
4. Select the 'Security' tab. 
   
5. In the 'Accepted Community Names' list, add new communities, for example:  'Public' community with 'READ ONLY'rights.
   
6. Still in the 'Security' tab, select the radio button 'Accept SNMP Packets from these hosts'.
   
7. Click on the 'Add' button to add the GFI Network Server Monitor or GFI LANguard Network Security Scanner machine. 
   
8. Restart the 'SNMP Service'.
   

For more info on SNMP : http://www.cisco.com/warp/public/535/3.html


 
On Cisco Devices (routers, Switches, Access points):

Telnet <ip address>
User Access Verification
Password:<enter telnet password>
CiscoDevice>en
Password:<enter Enable Password>
CiscoDevice#config ter
Enter configuration commands, one per line.  End
CiscoDevice(config)#snmp-server community ro <community string ro>
CiscoDevice(config)#snmp-server community rw <community string rw>
CiscoDevice(config)#end

SNMP configuration verification
CiscoDevice#sh running-config | i snmp
CiscoDevice#sh snmp
Chassis: FOC1107Y2BJ
Contact: ravindhar
Location: Chennai
1091999 SNMP packets input
    0 Bad SNMP version errors
    22 Unknown community name
    0 Illegal operation for community name supplied
    2 Encoding errors
    6570917 Number of requested variables
    288 Number of altered variables
    23106 Get-request PDUs
    1068559 Get-next PDUs
    110 Set-request PDUs
1091975 SNMP packets output
    0 Too big errors (Maximum packet size 1500)
    14 No such name errors
    2 Bad values errors
    0 General errors
    1091975 Response PDUs
    0 Trap PDUs
SNMP global trap: enabled

SNMP logging: disabled
SNMP agent enabled

 
On HP Devices:

Follow the commands illustrated below to enable SNMP on HP devices.

HP ProCurve Switch 2512(config)# snmp-server
 contact               Name of the switch administrator.
 location              Description of the switch location.
 community             Add/delete SNMP community.
community             Add/delete SNMP community.
 host                  Define SNMP traps and their receivers.
 enable                Enable/disable authentication traps to be sent when a
                       management station attempts an unauthorized access.
HP ProCurve Switch 2512(config)# snmp-server community
 ASCII-STR             Enter an ASCII string for the 'community'
                       command/parameter.
HP ProCurve Switch 2512(config)# snmp-server community public
 operator              The community can access all except the CONFIG MIB.
 manager               The community can access all MIB objects.
 restricted            MIB variables cannot be set, only read.
 unrestricted          Any MIB variable that has read/write access can be set.
 <cr>
HP ProCurve Switch 2512(config)# snmp-server community public manager
 restricted            MIB variables cannot be set, only read.
 unrestricted          Any MIB variable that has read/write access can be set.
 <cr>
HP ProCurve Switch 2512(config)# snmp-server community public manager unrestricted

 <cr>
HP ProCurve Switch 2512(config)# snmp-server
 contact               Name of the switch administrator.
 location              Description of the switch location.
 community             Add/delete SNMP community.
 host                  Define SNMP traps and their receivers.
 enable                Enable/disable authentication traps to be sent when a
                       management station attempts an unauthorized access.
HP ProCurve Switch 2512(config)# snmp-server enable traps
HP ProCurve Switch 2512(config)# exit
HP ProCurve Switch 2512# exit
HP ProCurve Switch 2512> exit
Do you want to log out [y/n]? y
Do you want to save current configuration [y/n]?y

 
To remove SNMP configuration, Just enter the above sequence with "no " as precedence to every command.


 
On Netgear Devices:

Follow these steps to configure SNMP on Netgear devices.

Step 1: access the device from http:// <ip address> the browser and enter the Admin credentials of the device.

Step 2: Go to Switch->Advanced->SNMP->Communities-> It will show the two Tables with add and delete options.

Step 3: Click on Add button for any of table depends on your need add the community string with management station as Your Agent or All.

 
On DLink:

Login to the DLink device using admin credentials via telnet and do follow the illustrated command to complete the SNMP configuration.

Step 1: DGS-3024:4#create snmp community public view ?
Command: create snmp community public view ?

Next possible completions:
read_only           read_write

Step 2: DGS-3024:4#create snmp community <public> view read_only

Step 3: DGS-3024:4#create snmp community <private> view read_write

Step 4: DGS-3024:4#show snmp community
step 5: Command: show snmp community

 SNMP Community Table
Community Name                    View Name                         Access Right
--------------------------------  --------------------------------  ------------
private                           CommunityView                     read_write
public                            CommunityView                     read_only

Total Entries: 2

 
On 3Com Devices:

The 3Com devices can be configured SNMP either from Browser or from CLI, whichever is comfortable to you.

Via http login:

1. Open Explorer, enter the device ip(3com) and login as Admin user.
   
2. Select device view->Ststem->Management->Community Strings->Modify
   
3. Enter the credentials and save them, with this the device will be accessible via SNMP from NMS System or SNMP manager.
   

Via Telnet:

1. Open a Telnet terminal either using putty or windows command prompt and login to the device using admin credentials. Here are the steps to do. 
   Login: admin
   Password:
   
   Menu options: -------3Com SuperStack 3 Switch 3824 24-port---------------------
    bridge              - Administer bridge-wide parameters
    feature             - Administer system features
    gettingStarted      - Basic device configuration
    logout              - Logout of the Command Line Interface
    physicalInterface   - Administer physical interfaces
    protocol            - Administer protocols
    security            - Administer security
    system              - Administer system-level functions
    trafficManagement   - Administer traffic management
   
   Type ? for help.
   --------------------------------3ComSwitch  (1)--------------------------------
   Select menu option: system
   
   
   Menu options: -------3Com SuperStack 3 Switch 3824 24-port---------------------
    backupConfig        - Administer configuration backup
    console             - Administer console port
    control             - Administer system control
    inventory           - Stack information
    management          - Administer system management
    summary             - Display summary information
   
   Type "quit" to return to previous menu or ? for help.
   --------------------------------3ComSwitch  (1)--------------------------------
   Select menu option (system): management
   
   
   Menu options: -------3Com SuperStack 3 Switch 3824 24-port---------------------
    contact             - Set the system contact
    location            - Set the system location
    name                - Set the system name
    password            - Set the system password
    snmp                - Administer SNMP
   
   Type "quit" to return to previous menu or ? for help.
   --------------------------------3ComSwitch  (1)--------------------------------
   Select menu option (system/management): snm
   
   
   Menu options: -------3Com SuperStack 3 Switch 3824 24-port---------------------
    community           - Set the SNMP community string
    linkTraps           - Enable/disable link up/down traps
    trap                - Administer SNMP trap destinations
   
   Type "quit" to return to previous menu or ? for help.
   --------------------------------3ComSwitch  (1)--------------------------------
   Select menu option (system/management/snmp): com
   
   Enter Read/Write community [private]: private
   Enter Read Only community [public]: public
   
   Select menu option (system/management/snmp):
   

 
On LinkSys:

1. On Linksys devices, unlike IOS command line for configuring SNMP, you need to launch a brower and enter the device ip and login with your admin credentials. You will found a tab named SNMP.
   
2. Under tab SNMP, select the communities, and enter new to add new SNMP credentials.
   
3. With this you have configured the device to be managed via SNMP protocol.