SNMP overview

Network management using SNMP requires three components:

The SNMP server on the Extreme device supports SNMP version 1 (SNMPv1), SNMP version 2 (SNMPv2), and SNMP version 3 (SNMPv3).

Also, the device supports the configuration of trap hosts as a trap recipient to receive filtered traps based on their severity level, and optionally receive SNMP communication through a VRF.

When clear command is issued to clear interface statistics, counters are cleared only from CLI version of the statistics and the SNMP version of the statistics are kept intact (SNMP stats preservation). SNMP accumulates the counters and displays aggregate values via IF-MIB queries. These MIB statistics can preserved by using the snmp-server preserve-statistics command by enabling or disabling these MIB statistics when the clear interface statistics command is issued.

snmp-server preserve-statistics command is enabled, SNMP MIB statistics are preserved .i.e clear command only clears counters from command line interface and not from SNMP IF-MIB. When snmp-server preserve-statistics is disabled, clear command deletes the counters from both the command line interface and SNMP versions.

Note

Note

By default, preserving of MIB statistics is enabled. User has to execute the CLI command to disable preserving of MIB statistics.
device(config)#  snmp-server preserve-statistics disable
device(config)# no  snmp-server preserve-statistics disable
Important

Important

SNMP SET operation is not supported.