Chapter 7: Device Management; Snmp Management; Snmp Overview - 3Com V7111 - VCX 4 Channels Analog FXO Media Gateway User Manual

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HAPTER
All VCX V7111 Gateways have similar functionality except for the number of
channels (the VCX V7111 24 FXS and 2FXS support only FXS), and all versions
are referred to collectively in this document as the VCX V7111.
VCX V7111 FXS refers only to the 24FXS, 8FXS, 4FXS, and 2FXS Gateways.
VCX V7111 FXO refers only to 8FXO and 4FXO Gateways.

SNMP Management

SNMP Overview

SNMP (Simple Network Management Protocol) is a standard network-based client/server-
based control protocol to manage devices in the network. The client program (called the
Network Manager) makes connections to a server program, called the SNMP Agent. The
SNMP Agent, embedded on a remote network device, serves information to the Network
Manager regarding the device's status. The database used by the Agent to retrieve
information, is referred to as the SNMP Management Information Base (MIB), and is a
standard set of statistical and control values. Apart from the standard MIBs documented in
IETF's RFCs, SNMP additionally allows the usage of private MIBs, containing non-standard
information set.
Directives, issued by the network manager client to an SNMP Agent, consist of the identifiers
of SNMP variables (referred to as MIB object identifiers or MIB variables) along with
instructions to either get the value for the identifier, or set the identifier to a new value.
The definitions of MIB variables supported by a particular agent are incorporated in
descriptor files, written in Abstract Syntax Notation (ASN.1) format, made available to
network management client programs so that they can become aware of MIB variables and
their usage.
The VCX V7111 contains an embedded SNMP Agent supporting both general network MIBs
(such as the IP MIB), VoIP-specific MIBs (such as RTP) and a proprietary MIB (known also
as 3Com MIB) enabling a deeper probe into the inter-working of the Gateway. All the
supported MIBs files are supplied as part of the release.
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