APM-DHCP Access Policy Example and Detailed Instructions

Hi  ,

I regret that I did not become aware of your inquiry sooner, but here's the answer anyway 🙂.

You seem to have missed the explanation of client hardware addresses on page 11 of the APM-DHCP documentation. Some DHCP servers (though not any of the popular ones) demand six-octet hardware addresses. You seem to have such a DHCP server. APM-DHCP has always been able to work with such DHCP servers...

Just set the value of variable session.dhcp.hwcode to "MAC" in your Access Policy's DHCP_Setup Variable Assign Item. When you do that, APM-DHCP will generate and send six-octet hardware addresses rather than four-octet ones.

(You may wonder why six-octet addresses are not the default. The main reason is to fend off attempts by very old or broken DHCP servers or promiscuous network monitoring devices to send Ethernet packets directly to any six-octet "hardware addresses" they see in DHCP requests. Sadly, there are still devices lurking on corporate networks which don't understand DHCP relay.)