FW: cisco 3750 dhcp question [7:129197]

From: Alexei Nikolaev (anikolaev@yeshey.com)
Date: Wed Jan 09 2008 - 09:58:23 ARST


I think you have to add "01" to client-identifier upfront. It means
Ethernet. Look at your debug output:

DHCPDISCOVER received from client 0100.0014.d965.79 on interface Vlan300

Client address is 0100.0014.d965.79, not 0000.14d9.6579
So just try to write it down this way:

ip dhcp pool mjking
   host 78.1.1.2 255.255.255.0
   client-identifier 0100.0014.d965.79
   default-router 78.1.1.1

I saw this trouble too. Here is some notes from the manual:

"client-identifier - Specifies the distinct identification of the client in
dotted
hexadecimal notation, for example, 01b7.0813.8811.66, where 01
represents the Ethernet media type."

Alexei Nikolaev
http://LearnCisco.Ru

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
salon wang
Sent: Tuesday, January 08, 2008 12:40 PM
To: cisco@groupstudy.com
Subject: cisco 3750 dhcp question [7:129197]

hi,all

   i am recently puzzled in cisco 3750 dhcp "manual binding "function.
   The problem is following;
 
   ***********
   topology
   ***********
   
    cisco3750--------------dhcp client
           int vlan 300
   *********
   problem description
   ********************
   dhcp client can't get ip address by "manual binding" .
 
   **********
   system configuration
   *******************
    interface GigabitEthernet1/0/11
    switchport access vlan 300
    switchport mode access
    no keepalive
    no cdp enable
    end
     interface Vlan300
     ip address 78.1.1.1 255.255.255.0
     end
   ip dhcp pool mjking
   host 78.1.1.2 255.255.255.0
   client-identifier 0000.14d9.6579
   default-router 78.1.1.1

205#show ip dhcp binding
IP address Client-ID/ Lease expiration Type
                 Hardware address
78.1.1.2 0000.14d9.6579 Infinite Manual
205#show ip dh
205#show ip dhcp se
205#show ip dhcp server st
205#show ip dhcp server statistics
Memory usage 5280
Address pools 2
Database agents 4
Automatic bindings 0
Manual bindings 1
Expired bindings 0
Malformed messages 0

Message Received
BOOTREQUEST 0
DHCPDISCOVER 36
DHCPREQUEST 0
DHCPDECLINE 0
DHCPRELEASE 0
DHCPINFORM 0

Message Sent
BOOTREPLY 0
DHCPOFFER 0
DHCPACK 0
DHCPNAK 0
205#

**********
logging
**********
.Jan 8 09:36:36: DHCPD: DHCPDISCOVER received from client 0100.0014.d965.79
on interface Vlan300.
.Jan 8 09:36:36: DHCPD: there is no address pool for
78.1.1.1.---->?????????
.Jan 8 09:37:03: DHCPD: checking for expired leases.
.Jan 8 09:37:41: DHCPD: DHCPDISCOVER received from client 0100.0014.d965.79
on interface Vlan300.

Anybody can help me?Thanks in advance.



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