Why does the AR router not raise alarms

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SNMP provides the alarm control function which can be used to control the alarm output of a module. A device can raise alarms only when this function is enabled on it.

To enable the alarm switch control function, perform the following steps:
1. Run the system-view command to enter the system view.
2. Run the snmp-agent trap enable command to enable the device to send alarms to the NMS.
3. Run the snmp-agent target-host trap-paramsname paramsname v1 securityname securityname [ binding-private-value ] [ trap-filterprofilename filterprofilename ] [ private-netmanager ] command to set the parameters of the Trap package sent by the device.
4. Run the snmp-agent target-host trap-hostname hostname address ipv4-addr [ udp-port udp-portid ] [ public-net | vpn-instance vpn-instance-name ] trap-paramsname paramsnam command to configure the target host to which the device sends alarms and error codes.

Description:
1. The binding-private-value parameter is supported in V200R001C01 or later.
2. The private-netmanager parameter is supported in V200R002C00 or later.

Other related questions:
Why does an AR router beep
If an AR router beeps, the ambient temperature may be too high, in which cause the built-in buzzer of the router will be triggered.

How do I query the Alarm of an AR router?
The Alarm can be queried through the following Web site: http://support.huawei.com/onlinetoolsweb/infoM/index.do?domain=1&lang=en&topicType=alarm

Why does the AR router interface change between Up and Down
When auto-negotiation is enabled on one end but disabled on the other end, set the same auto-negotiation mode on both ends. If auto-negotiation is enabled on one end of an electrical interface but disabled on the other end, packets may be discarded even when the interface is Up.

What are functions of real-time and scheduled synchronization of MAC addresses of the AR router
MAC address entry synchronization ensures that Layer 2 packets are forwarded based on MAC addresses, reducing broadcast storms. - Real-time synchronization responds to MAC address changes quickly, but packet loss may occur during synchronization due to the limited processing capability. - Periodic synchronization synchronizes MAC address entries at the second level. It is used with real-time synchronization to ensure that all MAC addresses can be synchronized and prevents aging of MAC address entries synchronized from other cards.

How to clear alarms on AR routers
Run the clear alarm active command on the device to clear the active alarms of the device. After the command is run, the system will clear all active alarms on the device. Clear alarms with caution because cleared active alarms cannot be recovered.

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