Proceed to enable link monitoring in one of the following ways:
If you want to enable monitoring for a link that was established from a CPE device, go to the SD-WAN → CPE section, click the CPE device, select the Tunnels tab, and click Management → Set thresholds next to the link.
If you want to enable monitoring of one of the links in the table of all links, go to the Infrastructure section, click Management → Configuration menu next to the controller, go to the Tunnels section, and click Management → Set thresholds next to the link.
If you want to enable monitoring of one of the links in the graphic topology with all links, go to the Infrastructure section, click Management → Configuration menu next to the controller, go to the Topology section, click the link, and click Set thresholds.
Select the Enable tunnel thresholds monitoring check box to enable link monitoring. This check box is cleared by default.
If you want to specify link monitoring thresholds:
To set default link monitoring thresholds, click Set to default.
If you want the controller to use the link as the last resort when calculating paths, regardless of monitoring thresholds, select the Unsolicited check box. This check box is cleared by default.
In the Interval for processing errors and utilization rate (sec.) field, enter the interval in seconds for measuring the number of errors on the link and its level of utilization. Range of values: 1 to 300. The default setting is 60.
If you want to specify a threshold for the number of errors per second on the link, select the Enable error monitoring check box and in the Critical error level (errors/sec.) field, enter the threshold value. Range of values: 1 to 1,000,000. By default, the check box is cleared and the field is set to 1000.
If you want to specify a threshold for link utilization as a percentage of the bit rate of the source service interface, select the Enable utilization monitoring check box and in the Critical utilization level (%) field, enter the threshold value. By default, the check box is cleared and the field is set to 95.
In the Interval for processing latency, jitter, and packet loss (sec.) field, enter the time interval, in seconds, for measuring latency, jitter, and packet loss on the link. Range of values: 1 to 600. The default setting is 30.
If you want to specify a threshold for latency in milliseconds for transmitting traffic over the link, select the Enable latency monitoring check box and in the Critical latency level (ms.) field, enter the threshold value. Range of values: 5 to 1000. By default, the check box is cleared and the field is set to 100.
If you want to specify a threshold for jitter time in milliseconds for transmitting traffic over the link, select the Enable jitter monitoring check box and in the Critical jitter level (ms.) field, enter the threshold value. Range of values: 5 to 1000. By default, the check box is cleared and the field is set to 100.
If you want to specify a threshold for the percentage of lost traffic packages on the link, select the Enable packet loss monitoring check box and in the Critical packet loss level (%) field, enter the threshold value. Range of values: 1 to 100. By default, the check box is cleared and the field is set to 2.
Save the link monitoring settings in one of the following ways:
To save the link monitoring settings, click Save.
If you want to save the link monitoring settings and specify the same settings on the opposite-direction link, click Save for both tunnels.
If you have specified link monitoring settings for a link established from the CPE device, click Save in the upper part of the settings area to save the CPE device settings.