VLAN configuration help

Question

I am lost on this, and I could use a bit of help. I have one PC that I want to isolate on my network on its own VLAN.

Here is a rundown of my equipment:

• Netgear GS752TP Switch
• Cisco RV120w Router

On the Cisco Router I created VLAN 10 and tagged Port 3 you can see the config here:

It added the VLAN Subnet Table, and it is configured to be the DHCP seen here:

On the Netgear switch, I have configured Port 26 and Port 5 to "Tag" for VLAN 10. (Port 26 goes to Port 3 on my router and Port 5 goes to my PC.)

What I am expecting is my PC on Port 5 to grab an IP address from the DHCP from the router, but instead it is picking up an IP address from my DHCP running on my main network. I am lost....

Here is what I have tried with no success:

1. Untagged VLAN 10 on Port 3 of the router and Untagged VLAN 10 on the switchports. This Confige will still grab an IP from my main DHCP which is NOT what I want.
2. I have tried changing PVID to 10 on Switchport 5 & 26. This will NOT grab an IP from the DHCP

Answer 1

You don't tag VLANs on access interface. You tag VLANs on a trunk interface. The tags are to separate traffic on trunks that carry multiple VLANs. Most end-devices, e.g. PCs don't understand VLAN tags, and they will drop tagged frames as giants.

Simply set any access interfaces in the access VLAN, but do not tag the frames.

If the link between the router and switch is a trunk (traffic for multiple VLANs on the same link), then you tag the frames on the interfaces, otherwise you don't, and you almost never tag the frames on an interface to a PC.

You will need a separate DHCP scope for the network on your new VLAN.