Still looking at my old ASA-5510... I'm confused by the relationship between ARP and DHCP information.
In the DHCP server table, some devices (not all) show a client ID which is not their 36-bit MAC address, but a 40-bit value which is apparently the MAC prepended with 0x01.
For example, the ARP Table shows the device at 192.168.1.58 as having mac address d807.b6d7.04ab, but the DHCP table shows that address as being used with client id 01d8.07b6.d704.ab
This happens for many DHCP clients, but certainly not all of them.
Should this surprise me or not? Are these two tables only incidentally related, since they affect different protocols?
(I was hoping that putting a static entry in the ARP table would tell DHCP to provide that static IP address in response to requests from that MAC address, since the 5510 predates the versions of the firmware that allow directly setting static DHCP bindings. Alas, it apparently doesn't -- but while looking at the two I noticed this 01 oddity and I'd like to understand why Client ID isn't just MAC.)
