arp response from switch not seen

[Paul Lockyer]

I have a SG220-50 connected to my smoothwall UTM device and I have left the default ip settings set on the switch. 

The switch is connected via port 1 (admin vlan tag 1) to port 4 of my smoothwall appliance. I have set up a vlan interface with tag id 1 on port 4 as well. 

When I run a tcpdump against the port 4 I can see the ARP request being sent to the switch but we never get a response back. If I untag the vlan on port 4 then I can see the arp response. 

Should I be seeing the ARP Response from the switch when the tag is set and if so who can I go about configuring the switch to allow this?

[chrihussey]

I have not worked with the SG220s, however, with the scenario you are describing it sounds like the switch port is simply an access port. Thus no tagging will take place. That may be why you got these results. 

For the most part, tagging occurs on trunk connections where multiple VLANs traverse a link and the respective VLANs are identified with the appropriate tag.

Unless you need to have multiple VLANs there should be no need for tagging.

Hope this helps