1. Can you please confirm whether IP range 220.127.116.11/24 belong to Google ? Base on the Whois IP lookup, the IP address is belongs to AL-SARD FIBER. If the defined IP address is invalid range, this will cause the defined outbound policy doesn’t match to the Google Traffics.
inetnum: 18.104.22.168 - 22.214.171.124
descr: AL-SARD FIBER Co. for Internet Fiber and Optical Cable Services /Ltd.
status: ALLOCATED PA
Step to obtain Google IP address ranges:
Beside that, we will advice to change the Google Traffics using outbound policy algorithm “Priority”. This will allow Google Traffics fail-over to other WAN.
2. You should have HTTPS persistent rule for the outbound policy. This will make sure some HTTPS connections that require to maintain connection persistency.
Overall, you should have the following outbound policy:
3. After defined the proper Google Traffics/HTTPS Outbound policy, if you still find WAN1 is saturated for long periods of times, do consider to lower the WAN1 “Load Distribution Weight”.