Using a VLAN to isolate potentially hazardous machines

I have an XTM 515 which Spiceworks scans, finds, and then fails to identify, and am lost as to what to do next. 
I turned on SNMP in the Watchguard configuration, and added the firewall rule from the Spiceworks IP to Firebox; later, I included all Trusted in the from (didn't change anything). 
I have tried SNMPv1/v2c, and v3, as well as all combinations of traps/informs. 
Spiceworks accepts the credentials, says "Yep! It worked. We're rescanning the device now." then spins for a while, before returning to the N-scale robot not identified device page.
Any advice would be appreciated.

Have you done this?I've found several wiki pages on building the configuration files, but nothing about setting up DHCP to option 66 or how to make sure tftp is running on the FreePBX server, etc.I've purchased the Endpoint manager module and created a template and a config for a few phones, but when I ftp IP:69 from my windows workstation to my FreePBX box I get Connection Refused. I get the same when I ftp from the FreePBX box itself.netstat -a | grep tftp provides udp 0 0 *:tftp :So I think it's enabled.netstat -unlp | grep xinetd udp 0 0 0.0.0.0:69 0.0.0.0:* 1119/xinetdI think this means tftp is running on port 69iptables-saveGenerated by iptables-save v1.4.7 on Wed Jul 1 15:59:46 2015*filter :INPUT ACCEPT [1077942:539260982] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [931595:198694389] :fail2ban-BadBots - [0:0] :fail2ban-FTP - [0:0]...

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    Advantages:
    1. Quick, easy and cheap storage location for simplex files for transfer to keep on hand and yet off the computer.
    2. Easy source for small-file data sharing.

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