Service Manual

• 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
As previously stated, 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).
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 congurations are available for SNMP read/write operations: no password or privacy,
password privileges, password and privacy privileges.
You can congure a maximum of 16 users even if they are in dierent groups.
Creating a Community
For SNMPv1 and SNMPv2, create a community to enable the community-based security in 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
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.
Dell Networking OS 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: %STKUNIT0-P:CP %SNMP-6-SNMP_WARM_START: Agent Initialized - SNMP WARM_START.
To choose a name for the community you create, use the following command.
• Choose a name for the community.
CONFIGURATION mode
snmp-server community name {ro | rw}
Example of Creating an SNMP Community
To view your SNMP conguration, use the show running-config snmp command from EXEC Privilege mode.
Dell(conf)#snmp-server community my-snmp-community ro
22:31:23: %STKUNIT0-P:CP %SNMP-6-SNMP_WARM_START: Agent Initialized - SNMP WARM_START.
Dell#show running-config snmp
!
snmp-server community mycommunity ro
704
Simple Network Management Protocol (SNMP)