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RE: DHCP question - manual binding posted 11/18/2006
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did you try to use client-identifier command ?

You should add 01 in the begining of the mac address

If you revised the documentation you will see the following :

-----------------------------------------------
Microsoft clients require client identifiers instead of
hardware addresses. The unique identification of the
client is specified in dotted hexadecimal notation, for
example, 01b7.0813.8811.66, where 01 represents the Ethernet media type.
------------------------------------------------------

what is the fact behind this, I understood from what mentioned that we should
not use hardware address command incase our client is Microsoft, what is the
rational behind this ?


Thanks in advance

Ismail




-----Original Message-----
From: nobody@xxxxxxxxxxxxxx on behalf of Kal Han
Sent: Sat 11/18/2006 4:08 AM
To: Groupstudy; Cisco certification
Subject: DHCP question - manual binding

Hi
I want to create a dhcp pool and assign IPs from that pool.
But there is a server known by a name, for which I want to assign
the same IP everytime. ( which ever host machine is configured with
that name, after it reboots, that machine should get a specific IP )

eg,.
server name: filter-test8 ( mac-add = 00a0.c981.bd91 ) <--- this host
desired IP: 172.16.1.100                                            <---
this IP.

I tried to get this working but couldnt .. so far.
Here is my config.

ip dhcp excluded-address 172.16.1.1
ip dhcp excluded-address 172.16.1.12
ip dhcp excluded-address 172.16.1.100 <-------- should I exclude from the
pool ???
!
ip dhcp pool LAB5 <------------------only for the sake of this server
   host 172.16.1.100 255.255.255.0
   hardware-address 00a0.c981.bd91 ieee802
   client-name filter-test8
   default-router 172.16.1.1
!
ip dhcp pool ALL <----------------- my whole pool
   import all
   network 172.16.1.0 255.255.255.0
   default-router 172.16.1.1
!

when I do the show IP dhcp bindings, I see
( looks correct )
Bindings from all pools not associated with VRF:
IP address          Client-ID/              Lease expiration        Type
                    Hardware address/
                    User name
172.16.1.100        00a0.c981.bd91          Infinite                Manual

*but when I reboot this pc, I am getting addresses from the pool*
*( 172.16.1.2 to start with )*
**

my debug on the router shows some thing like this
If you look at the bold MAC address, I dont know what that is and
where its coming from. the host that requesting this should have
a mac of 00a0.c981.bd91 ( which I configured above )

Nov 20 00:43:52.470: DHCPD: checking for expired leases.
R2#
Nov 20 00:44:01.526: DHCPD: DHCPDISCOVER received from client *
0100.a0c9.81bd.9c* on interface FastEthernet0/1.
R2#
Nov 20 00:44:03.530: DHCPD: assigned IP address 172.16.1.3 to client *
0100.a0c9.81bd.9c*.
Nov 20 00:44:03.530: DHCPD: Sending DHCPOFFER to client *0100.a0c9.81bd.9c*(
172.16.1.3).
Nov 20 00:44:03.530: DHCPD: creating ARP entry (172.16.1.3, *00a0.c981.bd9c*
).
Nov 20 00:44:03.530: DHCPD: unicasting BOOTREPLY to client 00a0.c981.bd9c (
172.16.1.3).
Nov 20 00:44:03.534: DHCPD: DHCPREQUEST received from client
0100.a0c9.81bd.9c.
Nov 20 00:44:03.534: DHCPD: Sending DHCPACK to client 0100.a0c9.81bd.9c (
172.16.1.3).
Nov 20 00:44:03.534: DHCPD: creating ARP entry (172.16.1.3, 00a0.c981.bd9c).
Nov 20 00:44:03.534: DHCPD: unicasting BOOTREPLY to client 00a0.c981.bd9c (
172.16.1.3).


Please let me know whats wrong

Thanks
Kal

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