Reference Guide

Configuration Task List for SNMP
Configuring SNMP version 1 or version 2 requires a single step.
NOTE: The configurations in this chapter use a UNIX environment with net-snmp version 5.4. This environment is only one
of many RFC-compliant SNMP utilities you can use to manage your Dell Networking system using SNMP. Also, these
configurations use SNMP version 2c.
● Creating a Community
Configuring SNMP version 3 requires configuring SNMP users in one of three methods. Refer to Setting Up User-Based
Security (SNMPv3).
Related Configuration Tasks
● Managing Overload on Startup
● Reading Managed Object Values
● Writing Managed Object Values
● Subscribing to Managed Object Value Updates using SNMP
● Copying Configuration Files via SNMP
● Manage VLANs Using SNMP
● Enabling and Disabling a Port using SNMP
● Fetch Dynamic MAC Entries using SNMP
● Deriving Interface Indices
● Monitor Port-channels
Important Points to Remember
● Typically, 5-second timeout and 3-second retry values on an SNMP server are sufficient for both LAN and WAN applications.
If you experience a timeout with these values, increase the timeout value to greater than 3 seconds, and increase the retry
value to greater than 2 seconds on your SNMP server.
● User ACLs override group ACLs.
Set up SNMP
The Dell Networking OS supports SNMP version 1 and version 2 that are community-based security models.
The primary difference between the two versions is that version 2 supports two additional protocol operations (informs
operation and snmpgetbulk query) and one additional object (counter64 object).
SNMP version 3 (SNMPv3) is a user-based security model that provides password authentication for user security and
encryption for data security and privacy. Three sets of configurations are available for SNMP read/write operations: no
password or privacy, password privileges, password and privacy privileges.
You can configure a maximum of 32 users even if they are in different groups.
Creating a Community
For SNMPv1 and SNMPv2, create a community to enable the community-based security on the switch.
The management station generates requests to either retrieve or alter the value of a management object and is called the
SNMP manager. A network element that processes SNMP requests is called an SNMP agent. An SNMP community is a group
of SNMP agents and managers that are allowed to interact. Communities are necessary to secure communication between
SNMP managers and agents; SNMP agents do not respond to requests from management stations that are not part of the
community.
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Simple Network Management Protocol (SNMP)