When listing MAC addresses on a Cisco ISR DHCP service, I get a long list of hardware addresses, one per IP address, but for one IP I get an address so long it runs onto three lines. The other addresses are all either 48 bit or 56 bit. What do I make of this long one? Could a device really use this address in a DHCP request? The interfaces are of type Gigabit Ethernet. Could this be a misconfiguration on this switch?
Below is partial readout including the relevant IP.
somerouterName#sho ip dhcp bind Bindings from all pools not associated with VRF: IP address Client-ID/ Lease expiration Type Hardware address/ User name <SNIP> 172.17.28.7 01c0.8c71.8b24.11 Oct 08 2019 02:20 PM Automatic 172.17.29.2 c42f.ad16.1012 Oct 08 2019 01:42 PM Automatic 172.17.29.3 ff50.fe6e.6100.0200. Oct 08 2019 01:42 PM Automatic 00ab.114e.079c.1a11. 6aea.46 172.17.31.6 01bc.5ff4.4b99.7a Oct 08 2019 01:41 PM Automatic <SNIP> someRouterName#