Edge-Core AS5700-54X, Справочное руководство CLI, Страница: 188 / 1116

Chapter 5
| SNMP Commands
SNMP Target Host Commands
– 188 –
Command Usage
◆
If you do not enter an snmp-server host command, no notifications are sent. In
order to configure the switch to send SNMP notifications, you must enter at
least one
snmp-server host command. In order to enable multiple hosts, you
must issue a separate snmp-server host command for each host.
◆
The snmp-server host command is used in conjunction with the snmp-server
enable traps command. Use the snmp-server enable traps command to enable
the sending of traps or informs and to specify which SNMP notifications are
sent globally. For a host to receive notifications, at least one
snmp-server
enable traps command and the snmp-server host command for that host
must be enabled.
◆
Some notification types cannot be controlled with the snmp-server enable
traps command. For example, some notification types are always enabled.
◆
Notifications are issued by the switch as trap messages by default. The recipient
of a trap message does not send a response to the switch. Traps are therefore
not as reliable as inform messages, which include a request for
acknowledgement of receipt. Informs can be used to ensure that critical
information is received by the host. However, note that informs consume more
system resources because they must be kept in memory until a response is
received. Informs also add to network traffic. You should consider these effects
when deciding whether to issue notifications as traps or informs.
To send an inform to a SNMPv2c host, complete these steps:
1.
Enable the SNMP agent ( page 182 ).
2.
Create a view with the required notification messages ( page 194 ).
3.
Create a group that includes the required notify view ( page 191 ).
4.
Allow the switch to send SNMP traps; i.e., notifications ( page 186 ).
5.
Specify the target host that will receive inform messages with the snmp-
server host command as described in this section.
To send an inform to a SNMPv3 host, complete these steps:
1.
Enable the SNMP agent ( page 182 ).
2.
Create a remote SNMPv3 user to use in the message exchange process
(
page 193 ).
3.
Create a view with the required notification messages ( page 194 ).
4.
Create a group that includes the required notify view ( page 191 ).
5.
Allow the switch to send SNMP traps; i.e., notifications ( page 186 ).
6.
Specify the target host that will receive inform messages with the snmp-
server host command as described in this section.
◆
The switch can send SNMP Version 1, 2c or 3 notifications to a host IP address,
depending on the SNMP version that the management station supports. If the
snmp-server host command does not specify the SNMP version, the default is
to send SNMP version 1 notifications.