SNAT ports usage on logical router vmwNsxTDataCenterEntityId for SNAT IP vmwNsxTDataCenterSNATIPAddress has reached the high threshold value of vmwNsxTDataCenterSystemUsageThreshold%. New flows will not be SNATed when usage reaches the maximum limit. Action required: Log in as the admin user on Edge node and invoke the NSX CLI command `get firewall <LR_INT_UUID> connection state` by using the right interface uuid and check various SNAT mappings for the SNAT IP vmwNsxTDataCenterSNATIPAddress. Check traffic flows going through the gateway is not a denial-of-service attack or anomalous burst. If the traffic appears to be within the normal load but the alarm threshold is hit, consider adding more SNAT IP addresses to distribute the load or route new traffic to another Edge node.