RAD Data comm ASMI-450 operation manual Management Domains Under SNMP, SNMP Communities

SNMP Management

In addition, the ASMi-450 SNMP agent supports the RAD-private (enterprise- specific) MIB.

∙For ASMi-450/1152, the RAD-private MIB is identified as (read the following as a continuous string):

iso(1).org(3).dod(6).internet(1).private(4).enterprise s(1).rad(164).radGen(6).systems(1).radSysWAN(3).radASM i450R1152Sa

∙For ASMi-450/768, the RAD-private MIB is identified as:

iso(1).org(3).dod(6).internet(1).private(4).enterprise s(1).rad(164).radGen(6).systems(1).radSysWAN(3).radASM i450R768Sa

Management

Domains Under

SNMP

SNMP Communities

Enterprise-specific MIBs supported by RAD equipment, including those for the ASMi-450, are available in ASN.1 format from the RAD Technical Support Department.

SNMP enables, in principle, each management station that knows the MIBs supported by a device to perform all the management operations available on that device. However, this is not desirable in practical situations, so it is necessary to provide a means to delimit management domains.

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 32 characters defined by the user.

Any SNMP entity (this term includes both managed entities and management stations) is assigned by its user a community name.

Access Restriction Using SNMP Communities

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 the same read-only community name.

∙Read-write:the SNMP agent accepts and processes all the SNMP commands received from a management station with the same read-write community name.

For each SNMP entity, it is possible to define 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 names table of the entity). For example, the SNMP community names table of the ASMi-450 can include three community names.

In accordance with the SNMP protocol, the SNMP community of the originating entity is sent in each message.

B-4 ASMi-450 Installation and Operation Manual