IMO VLAN's on Extreme are some of the easiest to work with. No funky PVID's or weird terms, just tagged or untagged membership - that's it. Multiple and it's a trunk, one untagged and it's an access port. I don't often route in the switch unless I need a small /30 for an outside ISP or something like that so in my case I'm not usually using Bootprelay. It looked like you had a relay on the default vlan which is native to most of your users, so I don't think you need that set. Depending on your server, you could also tag V11 into that adapter, trunk the port with both def/11 and essentially drop DHCP on that subinterface directly (getting rid of relay).