View and subscribe to CEN alert events-Cloud Enterprise Network(CEN)-阿里云帮助中心

CEN provides proactive alerts that help you promptly identify risks, view affected resources, and prevent business disruptions.

Supported alert events

Alert events are predefined by Alibaba Cloud to record and send notifications about your cloud network resources. These events can indicate the execution status of an O&M task, a resource anomaly, or a change in resource status.

The CEN console supports three types of alert events, as described in the following table.

Event code	Name	Severity	Description	Alert rule	Recommended action
problem-cen-routeOverLimit	CEN route quota exceeded	Critical	The CEN route quota is exceeded, which may cause network issues.	Critical: The CEN route quota is exceeded, causing network issues.	Upgrade the Transit Router (TR). For detailed instructions, see Upgrade a Basic Edition Transit Router.
problem-cen-vpcAttachBandwidthOverLimit	Packet loss on a VPC connection due to exceeding the bandwidth limit	Critical	Packet loss occurs because the actual traffic on the Transit Router exceeds the bandwidth limit.	Critical: An alert is triggered if the inbound packet loss rate is greater than 0 for more than 5 data points within a 10-minute period.	Increase the peak bandwidth. For detailed instructions, see Increase CEN quotas.
problem-cen-peerAttachBandwidthOverLimit	Packet loss on an inter-region connection due to exceeding the bandwidth limit	Critical	Packet loss occurs because the actual traffic on the Transit Router exceeds the bandwidth limit.	Critical: An alert is triggered for a TR instance when both of the following conditions are met within a 10-minute period: Condition 1: The outbound peak bandwidth utilization is greater than or equal to 90% for more than 8 data points. Condition 2: The outbound packet drop rate due to rate limiting is greater than 100 pps for more than 8 data points.	Increase the peak bandwidth. For detailed instructions, see Increase CEN quotas.

View alert events

Log on to the CEN console.
On the CEN Instance page, find the target CEN instance and click its ID.
On the details page of the CEN instance, click the Event Center tab to view all events from the last 30 days.

Note

The Event Center tab in the CEN console is integrated with Network Intelligence Service (NIS). You can also view alert events by using the following methods:

View events in the NIS console. For more information, see View NIS reachability events.
View events in the CloudMonitor console. For more information, see View event history.

Subscribe to alert events

You can subscribe to events to receive timely notifications by phone, SMS, or email about their status and progress.

Log on to the CEN console.
On the CEN Instance page, find the target CEN instance and click its ID.
On the details page of the CEN instance, click the Event Center tab, and then click Event Subscription.
In the Alert Settings dialog box, you can subscribe to alert events. This interface is identical to the one in the CloudMonitor console. For detailed instructions, see Create an event-triggered alert rule.