Administrator Guide

MIBs are hierarchically structured and use object identifiers to address managed objects, but managed objects also have a
textual name called an object descriptor.
Implementation Information
The following describes SNMP implementation information.
● The Dell Networking OS supports SNMP version 1 as defined by RFC 1155, 1157, and 1212, SNMP version 2c as defined by
RFC 1901, and SNMP version 3 as defined by RFC 2571.
● The system supports up to 16 trap receivers.
● The Dell Networking OS implementation of the sFlow MIB supports sFlow configuration via SNMP sets.
● SNMP traps for the spanning tree protocol (STP) and multiple spanning tree protocol (MSTP) state changes are based on
BRIDGE MIB (RFC 1483) for STP and IEEE 802.1 draft ruzin-mstp-mib-02 for MSTP.
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).
Simple Network Management Protocol (SNMP)
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