VLAN untugged port (access port)

Forum|Forum|1 year ago
July 21, 2025
3 replies
480 views

Hello.
I purchased a Fortigate201G; previously, I used Mikrotik. I am unable to configure VLAN. I am creating them according to the instructions. On Mikrotik, I created tugged and untugged ports. However, the end computer does not receive an IP address from the VLAN. DHCP is enabled. Could you advise me on what I am doing incorrectly? topology FW-Mik_PC.jpg

funkylicious

SuperUser

hi,

not a mikrotik expert, but in your diagram you are using port1 and port2 to connect to the fw and the pc, in access mode vlan101, yet in the screenshot i only see bridge1 and port1 as tagged, port2 is untagged.

is the NIC on the PC doing the tagging if not try adding also port2/ether2 to the tagged interfaces.

"jack of all trades, master of none"

LoshkaAuthor

New Member

Port 2 is marked as an access port (untagged). The computer should have obtained an IP address automatically. I tested it. If you install Mikrotik instead of Fortigate, the computer will obtain an IP address via DHCP.

funkylicious

SuperUser

ok, starting to make a little more sense now

if you set a static ip on the pc can you ping the ip on the FGT ? if so, i would disable DHCP and re-enable it and see if it works then, even try do a packet capture to ensure that DHCP requests come in and out goes replies.

https://community.fortinet.com/t5/FortiGate/Technical-Tip-Diagnosing-DHCP-on-a-FortiGate/ta-p/192960

"jack of all trades, master of none"

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