I'm seeing some strange DHCP bindings on our router.
core2#sh ip dhcp binding
IP address Client-ID/ Lease expiration Type
172.16.75.111 0065 Jul 21 2009 02:54 PM Automatic
172.16.75.112 0100.2608.e469.17 Jul 21 2009 02:06 PM Automatic
172.16.75.113 0021.e9a0.777c Infinite Automatic
ip dhcp pool Wireless-512b
network 172.16.75.0 255.255.255.0
dns-server 184.108.40.206 220.127.116.11
What I don't understand is:
1/ Why is one DHCP client able to obtain an "Infinite" lease? I haven't set the lease option in the dhcp config and it should default to just 1 day. But there's this one DHCP client that keeps getting an infinite lease.
2/ How can one set the Client-ID/Hardware address to something other than the mac address? In the example we're getting a DHCP request from a Client-ID with 0065 - how is this possible???