Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Bedienungsanleitung PDF herunterladen (Seite 20)

Configuring SNMP, BOOTP, DHCP, and RARP Services

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For security reasons, the SNMP agent validates each request from an SNMP

manager before responding to the request, by verifying that the manager belongs

to an SNMP

community

with access privileges to the agent.

An SNMP community is a logical relationship between an SNMP agent and one

or more SNMP managers. The community has a name, and all members of a

community have the same access privileges: either read-only (members can view

conﬁguration and performance information) or read-write (members can view

conﬁguration and performance information, and also change the conﬁguration).

All SNMP message exchanges consist of a community name and a data ﬁeld,

which contains the SNMP operation and its associated operands. You can

conﬁgure the SNMP agent to receive requests and send responses only from

managers that are members of a known community. If the agent knows the

community name in the SNMP message and knows that the manager generating

the request is a member of that community, it considers the message to be

authentic and gives it the access allowed for members of that community. Thus,

the SNMP community prevents unauthorized managers from viewing or changing

the conﬁguration of a router.

Remote Network Monitoring (RMON)

You can conﬁgure a data collection module (DCM) in the Bay Networks 8-port

ANH™ to act as a remote monitoring (RMON) device

in compliance with RFC

1757. This RFC is an extension of SNMP, and speciﬁes a standard MIB that

deﬁnes both parameters for recording statistics and the actual statistics

themselves. The purposes of RMON include

• Monitoring network performance

You can conﬁgure the DCM to continuously perform diagnostics and monitor

network performance. If a network failure occurs, the DCM can store

statistical information about the failure. The management stations can use this

information to investigate the cause of the failure.

• Detecting and reporting problems

You can conﬁgure the DCM to recognize and continuously check for error

conditions.

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Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Bedienungsanleitung Seite 20