Associating Security Names with a Community (C-Web Interface)
For SNMPv1 or SNMPv2c packets, you must assign security names to groups at the [edit snmp v3 vacm security-to-group] hierarchy level, and you must associate a security name with an SNMP community.
To configure the community:
From the Create new list, select SNMP Community.
Enter a name for the new SNMP Community in the dialog box, and click OK.
From the side pane, expand the name of the SNMP community, enter information as described in the Help text in the main pane, and then click Apply.