Users Guide
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Simple Network Management Protocol (SNMP)
Network management stations use SNMP to retrieve or alter management data from network elements. A datum of management
information is called a managed object; the value of a managed object can be static or variable. Network elements store managed
objects in a database called a management information base (MIB).
MIBs are hierarchically structured and use object identiers to address managed objects, but managed objects also have a textual
name called an object descriptor.
NOTE: An I/O Aggregator supports standard and private SNMP MIBs, including Get operations in supported MIBs.
Supported Modes
Standalone, PMUX, VLT, Stacking
Implementation Information
The Dell Networking OS supports SNMP version 1 as dened by RFC 1155, 1157, and 1212, SNMP version 2c as dened by RFC 1901.
Conguring the Simple Network Management Protocol
NOTE: The congurations in this chapter use a UNIX environment with net-snmp version 5.4. This is only one of many
RFC-compliant SNMP utilities you can use to manage the Aggregator using SNMP. Also, these congurations use SNMP
version 2c.
Conguring SNMP version 1 or version 2 requires only a single step:
1. Create a community.
NOTE: IOA supports only Read-only mode.
Important Points to Remember
• Typically, 5-second timeout and 3-second retry values on an SNMP server are sucient for both local area network (LAN) and
wide area network (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.
Setting up SNMP
Dell Networking OS supports SNMP version 1 and version 2 which are community-based security models. The primary dierence
between the two versions is that version 2 supports two additional protocol operations (informs operation and snmpgetbulk query)
and one additional object (counter64 object).
Creating a Community
For SNMPv1 and SNMPv2, create a community to enable the community-based security in the Dell Networking OS.
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
Simple Network Management Protocol (SNMP)
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