Dell C9000 Line Cards Networking Configuration Guide for the C9000 Series Vers - Page 964
Related Configuration Tasks, Important Points to Remember, Set up SNMP, Creating a Community
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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. The system enables SNMP automatically when you create an SNMP community and displays the following message. You must specify whether members of the community may only retrieve values (read), or retrieve and alter values (read-write). 22:31:23: %SYSTEM-P:CP %SNMP-6-SNMP_WARM_START: Agent Initialized - SNMP WARM_START. 964 Simple Network Management Protocol (SNMP)
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