Cat. 2950 (IOS - 12.1(22)EA1) - show ip dhcp binding oddity

[rcsu-it]

Has anyone else noticed the following? :

When you enable a dhcp pool on a Catalyst 2950 an IP is issued to a client. To see this assignment you issue a show ip dhcp binding command.

What I'm seeing is that the MAC address is being displayed somewhat incorrectly as in the following:

lawren-2950#show ip dhcp binding

IP address Hardware address Lease expiration Type

10.1.1.1 0100.10a4.c0d3.4b Mar 01 1993 08:02 PM Automatic

10.1.1.2 0100.0039.4418.d0 Mar 01 1993 08:26 PM Automatic

lawren-2950#

lawren-2950#

lawren-2950#

lawren-2950#ping 10.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

dnr-lawren-2950#

lawren-2950#

lawren-2950#

lawren-2950#

lawren-2950#show ip arp 10.1.1.1

Protocol Address Age (min) Hardware Addr Type Interface

Internet 10.1.1.1 0 0010.a4c0.d34b ARPA Vlan1

My question is, does this prepended "01" have some significance?

[szahid · Accepted solution]

"01" signifies the physical medium and here "01" means Ethernet. That means the client who was given out this address sits on an ethernet segment.

Hope this helps.

thanks

Salman