Netgear M4100-D12G-POE+ (GSM5212P) - ProSAFE Gigabit L2+ Managed Switch Administrator's Guide

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DVLANs and Private VLANs 
321
 ProSAFE M4100 Managed Switches
a. Select Security > Traffic Control > Private Group VLAN > Private Group VLAN > 
Private Group Membership. A screen similar to the following displays.
b.  In the Group ID list, select 2
c.  Click Unit 2. The ports display.
d.  Click the gray boxes under ports 16 and 17, and a check mark displays in each box. 
e.  Click Apply.