Monitor inter-region connections

You can use CloudMonitor to view bandwidth information about inter-region connections and set threshold-triggered alert rules. This way, you are notified if bandwidth usage exceeds the specified threshold. You can reallocate bandwidth resources as needed to ensure service availability.

Background information

After you create an inter-region connection, you can view the bandwidth usage of the following resources and create threshold-triggered alert rules for them:

Inter-region connections
Quality of service (QoS) queues for an inter-region connection
Note
You can view the bandwidth usage of QoS queues that are associated only with inter-region connections on Enterprise Edition transit routers.

View monitoring data of inter-region connections

Log on to the CEN console.
On the Instances page, click the ID of the CEN instance that you want to manage.
Choose Basic Settings > Transit Router and click the ID of the transit router that is associated with the inter-region connection.
On the details page of the transit router, click the Cross-region Connections tab.

On the Cross-region Connections tab, find the inter-region connection that you want to monitor and click the icon in the Monitor column. In the panel that appears, select All Queues in the upper-left corner to view the bandwidth usage of the inter-region connection.

The monitoring data within the last hour is displayed by default. Monitoring data is collected every 1 minute by default.
You can query monitoring data within the last 3 hours, 6 hours, 12 hours, 1 day, 7 days, and 30 days, or a custom time period. You can also set the Interval parameter to query monitoring data that is collected at a specified interval.
Each data entry is the average value within a minute.
- To monitor the peak bandwidth, the system collects a bandwidth value every 6 seconds. A total of 10 bandwidth values are collected in each minute. The largest value is used as the peak bandwidth value in the minute.
  Note
  Bandwidth monitoring data shows traffic fluctuations within seconds.
- The average value within a minute is used as the average bandwidth value within the minute.
Monitoring data can be automatically updated.
On the top of the Charts tab, turn on Auto Refresh to enable the system to automatically update the monitoring data every minute.

Metric	Description
InterRegionPeakBandwidthRate	This monitoring metric consists of four items. The system displays the following information for two connected regions, such as Region A and Region B: The peak bandwidth of data transmission from Region A to Region B. Unit: bit/s. The peak bandwidth of data transmission from Region B to Region A. Unit: bit/s. The average bandwidth of data transmission from Region A to Region B. Unit: bit/s. The average bandwidth of data transmission from Region B to Region A. Unit: bit/s.
InterRegionPeakBandwidthUtilization	This monitoring metric consists of four items. The system displays the following information for two connected regions, such as Region A and Region B: The percentage of the peak bandwidth of data transmission from Region A to Region B. The percentage of the peak bandwidth of data transmission from Region B to Region A. The percentage of the average bandwidth of data transmission from Region A to Region B. The percentage of the average bandwidth of data transmission from Region B to Region A.
InterRegionRateLimitDropPackets	This monitoring metric consists of two items. The system displays the following information for two connected regions, such as Region A and Region B: The loss rate of packets transmitted from Region A to Region B. Unit: pps. The loss rate of packets transmitted from Region B to Region A. Unit: pps.
LatencyByConnectionRegion	The network latency between the regions. Unit: milliseconds.

Note

You can also view monitoring data of inter-region connections on the Charts tab. For more information, see View the monitoring data of inter-region connections.
The metrics InternetOutRateByConnectionRegionA/B, InternetOutRatePercentByConnectionRegionA/B, and InternetOutDropRateByConnectionRegionA/B are deprecated.

Create threshold-based alert rules for an inter-region connection

Log on to the CEN console.
On the Instances page, click the ID of the CEN instance that you want to manage.
Choose Basic Settings > Transit Router and click the ID of the transit router that is associated with the inter-region connection.
On the details page of the transit router, click the Cross-region Connections tab.
On the Cross-region Connections tab, find the inter-region connection and click Set Alarm in the Monitor column.
On the Alert Rules page, click Create Alert Rule.

On the Create Alert Rule page, select CEN-Monitoring for Service, set other parameters as needed, and then click OK.

The following table describes the parameters that are relevant to this topic. For more information about how to configure other parameters, see Create an alert rule.

Click +Create Alert Rule, set the following parameters in the Add Rule Description panel, and then click OK.

Parameter	Description
Rule Name	Enter a name for the alert rule.
Metric Type	Select a metric type for the alert rule. In this example, Single Metric is selected. For more information about how to configure multiple metrics and dynamic thresholds, see Create an alert template. Single Metric Multiple Metrics Dynamic Threshold
Metric	Select a metric for the alert rule. InterRegionAverageBandwidthRate: the average outbound bandwidth. Unit: bit/s. InterRegionAverageBandwidthUtilization: the percentage of the average outbound bandwidth to the maximum bandwidth of the inter-region connection. InterRegionPeakBandwidthRate: the peak outbound bandwidth. Unit: bit/s. InterRegionPeakBandwidthUtilization: the percentage of the peak outbound bandwidth to the maximum bandwidth of the inter-region connection. InterRegionRateLimitDropPackets: the rate of packets dropped due to throttling between the regions. Unit: pps. Note The metrics InternetOutRateByConnectionRegionA/B, InternetOutRatePercentByConnectionRegionA/B, and InternetOutDropRateByConnectionRegionA/B are deprecated.
Threshold and Alert Level	Set the alert conditions, alert threshold, and alert level of the alert rule.
Chart Preview	The monitoring data of the selected metric is displayed in the chart.

Monitor QoS queues

View the bandwidth usage of QoS queues

Log on to the CEN console.
On the Instances page, click the ID of the CEN instance that you want to manage.
Choose Basic Settings > Transit Router, find the transit router that is associated with the inter-region connection, and then click the ID of the transit router.
On the details page of the transit router, click the Cross-region Connections tab.

On the Cross-region Connections tab, find the inter-region connection that you want to manage and click the icon in the Monitor column. In the panel that appears, select Default or a custom queue.

The monitoring data within the last hour is displayed by default. Monitoring data is collected every 1 minute by default.
You can query monitoring data within the last 3 hours, 6 hours, 12 hours, 1 day, 7 days, and 30 days, or a custom time period. You can also set the Interval parameter to query monitoring data that is collected at a specified interval.
Each data entry is the average value within a minute.
- To monitor the peak bandwidth, the system collects a bandwidth value every 6 seconds. A total of 10 bandwidth values are collected in each minute. The largest value is used as the peak bandwidth value in the minute.
  Note
  Bandwidth monitoring data shows traffic fluctuations within seconds.
- The average value within a minute is used as the average bandwidth value within the minute.
Monitoring data can be automatically updated.
On the top of the Charts tab, turn on Auto Refresh to enable the system to automatically update the monitoring data every minute.

Metric	Description
InterRegionQosQueuePeakBandwidthRate	This monitoring metric consists of two items: Rate of Outbound Bandwidth: the peak bandwidth of the queue when the local transit router transmits data to the peer transit router. Unit: bit/s. Average Rate of Outbound Bandwidth: the average bandwidth of the queue when the local transit router transmits data to the peer transit router. Unit: bit/s.
InterRegionQosQueuePeakBandwidthUtilization	This monitoring metric consists of two items: Usage of Outbound Bandwidth: the percentage of the peak bandwidth of the queue to the bandwidth of the inter-region connection when the local transit router transmits data to the peer transit router. Average Usage of Outbound Bandwidth: the percentage of the average bandwidth of the queue to the bandwidth of the inter-region connection when the local transit router transmits data to the peer transit router.
InterRegionQosQueueRateLimitDropPackets	The packet loss rate of the queue when the local transit router transmits data to the peer transit router. Unit: pps.
LatencyByConnectionRegion	The network latency of the queue. Unit: milliseconds.

Create a threshold-triggered alert rule for a QoS queue

Log on to the CEN console.
On the Instances page, click the ID of the CEN instance that you want to manage.
Choose Basic Settings > Transit Router and click the ID of the transit router that is associated with the inter-region connection.
On the details page of the transit router, click the Cross-region Connections tab.
On the Cross-region Connections tab, find the inter-region connection that you want to manage and click Set Alert in the Monitor column.
On the Alert Rules page, click Create Alert Rule.

In the Create Alert Rule panel, set Product to CEN-TR, set other parameters, and then click OK.

The following table describes the parameters that are relevant to this topic. For more information about how to configure other parameters, see Create an alert rule.

Click +Create Alert Rule, set the following parameters in the Add Rule Description panel, and then click OK.

Parameter	Description
Rule Name	Enter a name for the alert rule.
Metric Type	Select a metric type for the alert rule. In this example, Single Metric is selected. For more information about how to configure multiple metrics and dynamic thresholds, see Create an alert template. Single Metric Multiple Metrics Dynamic Threshold
Metric	Select a metric for the alert rule. InterRegionQosQueuePeakBandwidthRate: the peak bandwidth of the queue when the local transit router transmits data to the peer transit router. Unit: bit/s. InterRegionQosQueuePeakBandwidthUtilization: the percentage of the peak bandwidth of the queue to the maximum bandwidth of the inter-region connection when the local transit router transmits data to the peer transit router. InterRegionQosQueueAverageBandwidthRate: the average bandwidth of the queue when the local transit router transmits data to the peer transit router. Unit: bit/s. InterRegionQosQueueAverageBandwidthUtilization: the percentage of the average bandwidth of the queue to the maximum bandwidth of the inter-region connection when the local transit router transmits data to the peer transit router. InterRegionQosQueueRateLimitDropPackets: the packet loss rate due to throttling on the queue when the local transit router transmits data to the peer transit router. Unit: pps.
Threshold and Alert Level	Set the alert conditions, alert threshold, and alert level of the alert rule.
Chart Preview	The monitoring data of the selected metric is displayed in the chart.

References

CEN - Region