Chapter 6. SNMP Option
110
November 2001
6.2.5 SNMP Communities
To enable the delimitation of management domains, SNMP uses
"communities". Each community is identified by a name, which is an
alphanumeric string of up to 255 characters defined by the user. Any
SNMP entity (this term includes both managed nodes and management
stations) is assigned by its user a community name. In parallel, the user
defines for each SNMP entity a list of the communities which are authorized
to communicate with it, and the access rights associated with each
community (this is the SNMP community name table of the entity).
In general, SNMP agents support two types of access rights:
Read-only the SNMP agent accepts and processes only SNMP getRequest
and getNextRequest commands from management stations
which have a read-only community name.
Read-write the SNMP agent accepts and processes all the SNMP
commands received from a management station with a read-write
community name. SNMP agents are usually configured to send
traps to management stations having read-write communities.
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