The document provides an overview of SNMP (Simple Network Management Protocol) and its management tools offered by ManageEngine, focusing on enabling SNMP, performing operations, and troubleshooting. It details the components of SNMP, including managers, agents, and managed devices, as well as the structure of OIDs and MIBs. Additionally, it highlights the functionalities of ManageEngine's SNMP MIB browser and encourages participation in an online community for SNMP-related discussions and resource sharing.

1. IT Management,
Simplified
Real-time IT management solutions for the new
speed of business

2. SNMP Demystified
- Part II
KARTHIK ANANDARAO
Sr. Product Consultant/Evangelist
ManageEngine

3. About me
• Senior Product Consultant and Evangelist
for ManageEngine. With Engineering and
MBA degrees from reputed Indian
Institutions,
• With over 17 years of IT Experience,
serving in different capacities including
System and Network Administration, IT
Management, and Consulting.
• Have travelled across the globe for
implementation, consultation and training
of ManageEngine products and solutions.

4. Join us soon
• Join us @ SNMP Nuts & Bolts
• https://connect.manageengine.com/groups/s
nmp-nuts-and-bolts
• SNMP Demystified - Part 1
• Video URL - http://bit.ly/1G2AT6u
• Presentation URL - http://bit.ly/1CrykqB

5. Agenda
• SNMP Demystified – Part 2
• Recap
• SNMP Tools
• Enable SNMP
• SNMP Walk
• Understand SNMP Table
• Receive Traps
• Check Community Strings
• Browse MIBS
• Perform SNMP Operations
• Troubleshoot SNMP
• Understand Error Messages

6. SNMP - Recap
• Simple Network Management Protocol
• Internet Standard Protocol to manage devices
on IP Networks
• Standard way of monitoring hardware and
software from any manufacturer from Cisco to
Juniper, from Microsoft to Unix.
• Has 3 components
• SNMP Manager – Monitoring solutions, NMS or EMS
• SNMP Agent - collects Management Information
• Managed Device – could be a network device or a
server or any device with an IP and SNMP Agent

7. SNMP - Recap
• Simple Network Management Protocol
• Has 3 versions
• SNMPv1
• SNMPv2c
• SNMPv3
• For enhanced security, administration and remote
configuration
• SNMP entity has an identifier – SNMPEngineID
• OIDs and MIBs
• OID is Object Identifier, defined in MIBs, Unique, can
be scalar or tabular and a dotted list of integers
• MIB is Management Information Base, collection of
OIDs.

8. ManageEngine SNMP Tools
• SNMP Tools
• ManageEngine SNMP MIB Browser
• ManageEngine Free Windows SNMP Enabler

9. Enable SNMP
• Windows
• Programs / Features – Turn on/off Windows
feature
• Linux
• Net-snmp
• Cisco devices
• #configure terminal
#snmp-server community
<community_string> rw/ro (example: snmp-
server community public ro)
#end
#copy running-config startup-config

10. Enable SNMP
• ManageEngine Windows SNMP Enabler
• Free
• Install / Enable SNMP on Windows machines
• Start / Stop SNMP Service
• Walk-through on the tool.

11. SNMP Tools
• ManageEngine SNMP MIB Browser
• Load/unload MIBs and fetch MIB data of SNMP(v1, v2c,
v3) agents
• Perform SNMP operations from Windows, Linux and Mac
devices
• Parse traps based on pre-defined match criteria
• View traps from SNMP agents and set up alert emails
• Leverage SNMPv3 security as defined in USM and VACM
standards
• View SNMP Table data and get graphical representation
in real-time
• Get the complete list of OIDs implemented on your
device

12. ManageEngine SNMP MIB
Browser

13. Understand SNMP Table
• SNMP Table
• A related group of OIDs for a performance
attribute
• Examples
• ifTable
• ipaddrTable

14. SNMP Walk
• SNMP response at-one-go for a group of
OIDs

15. Receive Traps
• Configure to receive Traps in
ManageEngine MIB Browser Tool
• Trap Destination
• Trap Community String

16. Check Community String
• Configure a community string
• Accept SNMP from certain hosts – security
configuration

17. Browse MIBS
• Copy MIBS and load them

18. Perform SNMP Operations
• GET
• GET-NEXT
• SET
• TABLE
• SNMPWALK
• Let us see how to do these using
ManageEngine SNMP MIB Browser

19. Troubleshoot SNMP
• Troubleshoot SNMP
• Check community string
• Firewall configuration, if any
• Trap port occupied by some other application
• Allow SNMP from the host specified
• Check SNMP timeout
• Increase retries
• Check supported MIBs for device type

20. Understand Error messages
• Standard Error Messages
• Request Failed : Error: Request timed out to
192.168.101.101
• SNMP is not enabled or configured
• Community String is incorrect
• Firewall blocks SNMP on port 161
• No data available in this sub-tree
• Agent is not configured with the MIB details
• Request Failed: Get Response PDU received
from 127.0.0.1 Error Indication in response:
There is no such variable name in this mib.
Errindex: 1
• SNMP Agent cannot find such a MIB variable in its
database

21. Understand Error messages
• Standard Error Messages
• Could not parse the file
H:/mibs/CHECKPOINT-MIB.mib – couldn’t
resolve these sequence constructs :
{cpvTnIMonEntry,fwIfEntry}
• Demo
• Loading MIBs Failed : Imports failed : Could
not find the file : H:/mibs/APPLICATION-MIB
• Demo

22. ManageEngine SNMP MIB
Browser
• Website
 http://www.manageengine.com/products/mibbrowser-
free-tool/
• Download
 http://www.manageengine.com/products/mibbrowser-
free-tool/download.html
• Features
 http://www.manageengine.com/products/mibbrowser-
free-tool/features.html
• FAQ
 http://www.manageengine.com/products/mibbrowser-
free-tool/faq.html
• Feedback
 http://www.manageengine.com/products/mibbrowser-
free-tool/feedback.html

23. ManageEngine SNMP
Community
• Join us @ SNMP Nuts & Bolts
• https://connect.manageengine.com/groups/s
nmp-nuts-and-bolts
• An online community
• Share SNMP MIBs
• Upload MIBs to the community to fix errors
• Share your thoughts on SNMP
• Accept the group invite
• ManageEngine’s MIB Database
• Short URL - http://bit.ly/1mgRTb9

24. Thank You