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[SOLVED] VLAN/DHCP Issue with Cisco switch

I have recently set up a VLAN (well attempted to) on my Sophos UTM9. I have a separate physical NIC configured as a VLAN interface. I created a separate DHCP serer and applied to the VLAN interface. When plugging into the switch, I don't get a response, no IP is assigned.

The switch port is configured as an access port, that is natively configured in the proper VLAN. I am under the impression that plugging into a port that is in vlan 5 only should work with the UTM VLAN interface.

Setup is as follows:

UTM > VLAN5 > switchport (access - in vlan5) > workstation.

Can someone provide guidance as to whether I am doing something wrong?

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0 radi0act1ve over 12 years ago

I just switched it to a trunk port, assigned it to both vlans.

I have tried setting the PVID to each vlan number as well - tagged and in tagged. No go on any of them.

I can get it to work as a standard Ethernet interface, but that won't allow me to isolate traffic, even if it is a different subnet and I deny traffic to the private network.

Any other ideas why it doesn't issue DHCP requests as a vlan interface. It is a separate physical NIC...
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0 radi0act1ve over 12 years ago

I just switched it to a trunk port, assigned it to both vlans.

I have tried setting the PVID to each vlan number as well - tagged and in tagged. No go on any of them.

I can get it to work as a standard Ethernet interface, but that won't allow me to isolate traffic, even if it is a different subnet and I deny traffic to the private network.

Any other ideas why it doesn't issue DHCP requests as a vlan interface. It is a separate physical NIC...
Cancel
Vote Up 0 Vote Down

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