A device supports only a limited number of VPLS VCs. After the total number of VPLS VCs created on a device exceeds a certain limit, the device performance deteriorates. To prevent device performance deterioration caused by excessive VPLS VCs, configure the upper and lower alarm thresholds for VPLS VCs. You can flexibly adjust the upper and lower alarm thresholds for VPLS VCs based on actual requirements.
By default, the upper and lower alarm thresholds are 80% and 70% respectively.