Specifications

Installation and Operation Manual Appendix B SNMP Management
FCD-E1LC Ver. 1.0 SNMP Environment B-3
The assigned number designates the top of an enterprise-specific sub-tree of
non-standard MIBs. Within this context, RAD has been assigned the enterprise
number 164. Therefore, enterprise MIBs published by RAD can be found under
1.3.6.1.4.1.164.
MIBs of general interest are published by the IAB in the form of a Request for
Comment (RFC) document. In addition, MIBs are also often assigned informal
names that reflect their primary purpose. Enterprise-specific MIBs are published
and distributed by their originator, which is responsible for their contents.
MIBs Supported by the FCD-E1LC SNMP Agent
The interpretation of the relevant MIBs is a function of the SNMP agent of each
managed entity. The general MIBs supported by the FCD-E1LC SNMP agent are as
follows:
• RFC 1213 (standard MIB-II).
• RFC 1406 (standard E1/T1 MIB).
In addition, the FCD-E1LC SNMP agent supports the RAD-private (enterprise-specific)
MIB identified as (read the following as a continuous string):
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).
rad(164).radGen(6).systems(1).radSysWAN(3).radFcdE1LC(27)
Enterprise-specific MIBs supported by RAD equipment, including those for the
FCD-E1LC, are available in ASN.1 format from the RAD Technical Support
Department.
Management Domains Under SNMP
In principle, SNMP enables any 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.
SNMP Communities
To enable the delimitation of management domains, SNMP uses “communities”.
Each community is identified by a name, which is an alphanumeric string 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 write community name.
In accordance with the SNMP protocol, the SNMP community of the originating
entity is sent in each message.