Administrator Guide

MIBs are hierarchically structured and use object identiers 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 dened by RFC 1155, 1157, and 1212, SNMP version 2c as dened by RFC 1901,
and SNMP version 3 as dened by RFC 2571.
• The system supports up to 16 trap receivers.
• The Dell Networking OS implementation of the sFlow MIB supports sFlow conguration 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.
Conguration Task List for SNMP
Conguring SNMP version 1 or version 2 requires a single step.
NOTE: The congurations 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 congurations
use SNMP version 2c.
• Creating a Community
Conguring SNMP version 3 requires conguring SNMP users in one of three methods. Refer to Setting Up User-Based Security
(SNMPv3).
Related Conguration Tasks
• Managing Overload on Startup
• Reading Managed Object Values
• Writing Managed Object Values
• Subscribing to Managed Object Value Updates using SNMP
• Copying Conguration 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 sucient 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 dierence between the two versions is that version 2 supports two additional protocol operations (informs operation and
snmpgetbulk query) and one additional object (counter64 object).
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Simple Network Management Protocol (SNMP)