3Com CoreBuilder 3500, Руководство по внедрению, Страница: 534 / 592

534 C
HAPTER
18: D
EVICE
M
ONITORING
IP Address Assignment
For the manager and agent to be able to communicate with one another
you need to assign IP addresses as follows:
■
Assign an IP address to either the system processor out-of-band
Ethernet port or an in-band Ethernet port, depending on where the
management station is attached.
■
Out-of-Band — Use the
management ip interface
define
command to assign the IP address for the out-of band
Ethernet port
■
In-band
— Use the
ip interface define
command to
assign IP address to the in-band Ethernet port.
Set the destination IP address to which the traps should be forwarded to
the manager by the system agent. See “Trap Reporting” later in this
chapter.
SNMP Messages
SNMP supports queries (called messages ) that allow the protocol to
transmit information between the managers and the agents. Types of
SNMP messages:
■
Get and Get-next — The management station requests an agent to
report information.
■
Set — The management station requests an agent to change one of
its parameters.
■
Get Responses — The agent responds to a Get, Get-next, or Set
operation.
■
Trap — The agent sends an unsolicited message informing the
management station that an event has occurred.
Management Information Bases (MIBs) define what can be monitored
and controlled within a device (that is, what the manager can Get and
Set). An agent can implement one or more groups from one or more
MIBs. See “Management Information Base (MIB)” later in this chapter for
more information.