In the article - How to set up Quality of Service (QoS), we learned how to classify traffic into different groups and prioritize each of them to prevent less important activities from using up too much bandwidth. Similarly, we can reserve bandwidth for VPN traffic to ensure that they have a higher priority than other packets.
This QoS configuration is based solely on the Local and Remote Addresses. The router will assign a higher priority to VPN traffic that is destined for the remote address. As such, it is not necessary to specify VPN protocols when setting up the QoS rule for VPN.
1. Go to Bandwidth Management >> Quality of Service, click Edit on a class rule.
2. Name this class, and click Add to add a new rule.
3. For LAN-to-LAN VPN, edit the rule as follows:
For Remote Dial-in VPN client (Host-to-LAN VPN), edit the rule as follows:
5. Go back to the QoS General Setup, configure the WAN interface where VPN is on as follows: (For older versions, click Setup on the WAN interface to edit)
6. You may go back to the QoS main page, click Status on the WAN interface to check if the VPN traffic is classified correctly.
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