Description: A sequence number used to indicate that the User Security Data Table, umc1SecurityDataTable, has been modified and it needs to be re-read. Whenever the SNMP agent is restarted, this value will be reset to 0(zero). The value will be incremented by one whenever a change to the User Security Data Table is made. This number will also be sent in the umc1TrapSecurityDataTableChange trap and can be used to determine if the manager has lost any traps. This value will be incremented before the trap is sent.

The maximum value it can assume is 2,147,483,647. An increment, every time it has reached its maximum value, shall cause it to be reset to 1.