NETGEAR M4200 Software Administration Manual page 70

Two check marks display in the box.
e. Click the Apply button to save the settings.
2. Add ports to lag_20.
a. Select Switching > LAG > LAG Membership.
A screen similar to the following displays.
b. Under LAG Membership, in the LAG ID list, select LAG 2.
c. Click Unit 1. The ports display.
d. Click the gray boxes under ports 8 and 9.
Two check marks display in the boxes.
e. Click Apply to save the settings.
Managed Switches
LAGs
70