2500e SPAN Available?

Since a Fortigate firewall doesn't support both DHCP server & DHCP relay, I need to create a mirror port so that ClearPass can receive the DHCP requests.

I can set this up on our switches but switch ports are at a premium and I have a ton of unused ports on my firewalls.  My thinking was to use the SPAN port function on the firewalls instead of losing the switch ports.

The problem is that it looks like SPAN isn't supported on the 2500e.  Can someone verify this?

Thx.  Matt.