Cisco Catalyst 3650 Series, Справочник по командам

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Though visible in the command-line help strings, the fru-ctrl keyword is not supported. Note
Command Modes
Global configuration
Command History
Modification Release
This command was introduced. Cisco IOS XE 3.3SECisco IOS XE 3.3SE
Usage Guidelines
SNMP notifications can be sent as traps or inform requests. Traps are unreliable because the receiver does
not send acknowledgments when it receives traps. The sender cannot determine if the traps were received.
However, an SNMP entity that receives an inform request acknowledges the message with an SNMP response
PDU. If the sender never receives the response, the inform request can be sent again, so that informs are more
likely to reach their intended destinations.
However, informs consume more resources in the agent and in the network. Unlike a trap, which is discarded
as soon as it is sent, an inform request must be held in memory until a response is received or the request
times out. Traps are also sent only once, but an inform might be retried several times. The retries increase
traffic and contribute to a higher overhead on the network.
If you do not enter an snmp-server host command, no notifications are sent. To configure the device to send
SNMP notifications, you must enter at least one snmp-server host command. If you enter the command with
no keywords, all trap types are enabled for the host. To enable multiple hosts, you must enter a separate
snmp-server host command for each host. You can specify multiple notification types in the command for
each host.
If a local user is not associated with a remote host, the device does not send informs for the auth (authNoPriv)
and the priv (authPriv) authentication levels.
When multiple
snmp-server host
commands are given for the same host and kind of notification (trap or
inform), each succeeding command overwrites the previous command. Only the last snmp-server host
command is in effect. For example, if you enter an snmp-server host inform command for a host and then
enter another snmp-server host inform command for the same host, the second command replaces the first.
The
snmp-server host
command is used with the
snmp-server enable traps
global configuration command.
Use the snmp-server enable traps command to specify which SNMP notifications are sent globally. For a
host to receive most 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. Other notification types
are enabled by a different command.
The no snmp-server host command with no keywords disables traps, but not informs, to the host. To disable
informs, use the no snmp-server host informs command.
Examples This example shows how to configure a unique SNMP community string named comaccess for traps and
prevent SNMP polling access with this string through access-list 10:
Device(config)# snmp-server community comaccess ro 10
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
563
snmp-server host