Support Forum
The Forums are a place to find answers on a range of Fortinet products from peers and product experts.
Shyam1
New Contributor

Internet not working after VLAN configuration

Hi , 

    We have a Fortigate 90E , when i try to create a new VLAN configuration in any one of the physical interface , i'm not able to get internet while directly connecting the port and laptop with a working ethernet cable. Anyone has faced this issue ?

4 REPLIES 4
mnovelli
Staff
Staff

If you configure a Vlan on a physical interface and then connect a PC to that interface, you need to configure vlan tag too on PC, otherwise it will not works.

 

Shyam1

hi thanks for the reply , can you please guide me on how to configure vlan tag on PC . i'm a bit confused on how to do it.

 

 

funkylicious

Hi, you can look at this, but probably you would need the network drivers installed from the manufacturer of the nic.

 

https://www.startech.com/en-dk/faq/vlan-tagging-network-card-windows?srsltid=AfmBOopWq5oAJ45JuNz_5i3...

 

L.E. Are you trying to create a interface on the FortiGate with a vlan id/tag ? If so, please make sure that the port in the switch is configured in trunk and that vlan is allowed on the port where you are connecting the FortiGate.

"jack of all trades, master of none"
"jack of all trades, master of none"
ebilcari

If you plan to use the tagged VLANs on Hyper-V guest VMs, there are some PowerShell commands that can help convert the interface to trunk and allow a list of VLAN, something like this:

Set-VMNetworkAdaptervlan -VMName FGW-VM1 -VMNetworkAdapterName "Adap4" -Trunk -AllowedVlanIdList "511-514" -NativeVlanId 0

 

If you have a secondary NIC in the PC and it supports VLAN tagging it will have this field in Configuration options:

adapter.PNG

- Emirjon
If you have found a solution, please like and accept it to make it easily accessible for others.
Announcements

Select Forum Responses to become Knowledge Articles!

Select the “Nominate to Knowledge Base” button to recommend a forum post to become a knowledge article.

Labels
Top Kudoed Authors