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SNMP, BootP, BootP/DHCP Relay, and DHCP Server Concepts

308644-15.1 Rev 00

2-5

SNMP View-Based Access Control

SNMP view-based access control allows you to filter the information from an

SNMP agent, thereby letting you control the view of the network. For example, a

service provider can create a unique view for two different customers, so that each

customer sees only the statistics and configuration information that the service

provider wants each to see. The customer can view these statistics remotely using

Site Manager.

To configure view-based access control, you must use either the BCC or the

Technician Interface. You enable an SNMP agent view by associating a view with

a community. A community can have only one agent view associated with it;

however, the view itself can contain many different MIB subtree inclusions and

exclusions.

For information about how to configure, list, or delete a view or its contents, see

“Configuring SNMP View-Based Access Control

” on page 3-19.

SNMP Implementation Notes

This section contains information about features specific to the Nortel Networks

implementation of SNMP.

Internet Protocol

SNMP uses the User Datagram Protocol (UDP) to transport its messages. You

must enable the Internet Protocol (IP) to use UDP and SNMP.

Events and Traps

An event is a change in the operating status of a router. The router stores the event

as a single entry in a memory-resident log.

An event log message provides a brief description of an event, along with the

event code associated with that event.

A trap is an event that the router transmits to the network management station.

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