In this example, for a specified user and a group, the AES128-CFB algorithm, the authentication password to enable the server to receivepackets from the host, and the privacy password to encode the message contents are configured.SHA authentication needs to be used with the AES-CFB128 privacy algorithm only when FIPS is enabled because SHA is then the onlyavailable authentication level. If FIPS is disabled, you can use MD5 authentication in addition to SHA authentication with the AES-CFB128privacy algorithmYou cannot modify the FIPS mode if SNMPv3 users are already configured and present in the system. An error message is displayed if youattempt to change the FIPS mode by using the fips mode enable command in Global Configuration mode. You can enable or disableFIPS mode only if SNMPv3 users are not previously set up. If previously configured users exist on the system, you must delete the existingusers before you change the FIPS mode.Keep the following points in mind when you configure the AES128-CFB algorithm for SNMPv3:1 SNMPv3 authentication provides only the sha option when the FIPS mode is enabled.2 SNMPv3 privacy provides only the aes128 privacy option when the FIPS mode is enabled.3 If you attempt to enable or disable FIPS mode and if any SNMPv3 users are previously configured, an error message is displayedstating you must delete all of the SNMP users before changing the FIPS mode.4 A message is logged indicating whether FIPS mode is enabled for SNMPv3. This message is generated only when the first SNMPv3user is configured because you can modify the FIPS mode only when users are not previously configured. This log message isprovided to assist your system security auditing procedures.Configuration Task List for SNMPConfiguring 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 ofmany RFC-compliant SNMP utilities you can use to manage your Dell Networking system using SNMP. Also, these configurationsuse SNMP version 2c.• Creating a CommunityConfiguring 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-channels862 Simple Network Management Protocol (SNMP)
