9A656-04/9A686-04 Configuration Guide
Page C-1
APPENDIX C
SUPPORTED MIBS
This appendix briefly describes the support provided for managing the SmartSwitch 9500
using Simple Network Management Protocol (SNMP).
C.1
MIB, SMI, MIB FILES AND INTERNET MIB HIERARCHY
A MIB (Management Information Base) is the term used to represent a virtual store of
management data on a device. Given the structure of management data, it can be operated
upon (retrieved, created or modified) using the SNMP protocol. The structure of that data is
defined using a subset of a notation called Abstract Syntax Notation (ASN.1). This subset is
called SMI (Structure of Management Information). A file containing the definition of that
structure is called a MIB file. To provide for a uniform naming convention for all MIBs, from
all vendors, for all kinds of data, a standard format is used. This format is a hierarchy and is
termed the Internet MIB Hierarchy.
The MIB structure is logically represented by a tree hierarchy (see
Figure C-1
). The root of
the tree is unnamed and splits into three main branches: Consultative Committee for
International Telegraph and Telephone (CCITT), International Organization for
Standardization (ISO), and joint ISO/CCITT.
These branches and those that fall below each category have short text strings and integers to
identify them. Text strings describe object names, while integers allow computer software to
create compact, encoded representations of the names. For example, the Enterasys Systems
MIB variable atmSpvcMIBObjects is an object name and is also represented by the number
one.
An object identifier in the Internet MIB hierarchy is the sequence of numeric labels on the
nodes along a path from the root to the object. The object for the Internet Standard for MIB II
is represented by the object identifier 1.3.6.1.2.1. It also can be expressed as
iso.org.dod.internet.mgmt.mib (see
Figure C-1
).
NOTE
For the authoritative reference on the concepts described in this section, refer to
RFCs 1901 through 1908.
Summary of Contents for 9A656-04
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