From: Keane, James (James.Keane@agriculture.gov.ie)
Date: Wed Apr 06 2005 - 11:23:58 GMT-3
The plot thickens !
Here is the debug AFTER doing kevins suggestion (using client identifier instead - thanks!!!)
Apr 6 15:02:45.612: DHCPD: checking for expired leases.
Apr 6 15:03:15.372: DHCPD: DHCPDISCOVER received from client 0100.4096.5745.a8 on interface Ethernet0.
Apr 6 15:03:15.372: DHCPD: requested address 10.99.1.50 has already been assigned.
Apr 6 15:03:17.372: DHCPD: assigned IP address 10.99.1.82 to client 0100.4096.5745.a8.
Apr 6 15:03:17.372: DHCPD: Sending DHCPOFFER to client 0100.4096.5745.a8 (10.99.1.82).
Apr 6 15:03:17.372: DHCPD: creating ARP entry (10.99.1.82, 0040.9657.45a8).
Apr 6 15:03:17.372: DHCPD: unicasting BOOTREPLY to client 0040.9657.45a8 (10.99.1.82).
Apr 6 15:03:22.390: DHCPD: DHCPREQUEST received from client 0100.4096.5745.a8.
Apr 6 15:03:22.394: DHCPD: Sending DHCPACK to client 0100.4096.5745.a8 (10.99.1.82).
Apr 6 15:03:22.394: DHCPD: creating ARP entry (10.99.1.82, 0040.9657.45a8).
Apr 6 15:03:22.394: DHCPD: unicasting BOOTREPLY to client 0040.9657.45a8 (10.99.1.82).
Ok so the client is sending 0100.4096.5745.a8
0100.4096.5745.a8 - so I need to match that ... hang on ... thats not its mac address !!!
its mac is 0040.9657.45a8
I can only assume that its sending 01 as DHCP Ethernet media type (see WEBREF#1 below)
ok I'll try that
ip dhcp pool MyReservedAddress
host 10.99.1.50 255.255.255.0
client-identifier 0100.4096.5745.a8
Now with that I see the following Debug
Apr 6 15:18:45.627: DHCPD: checking for expired leases.
Apr 6 15:18:49.083: DHCPD: DHCPDISCOVER received from client 0100.4096.5745.a8 on interface Ethernet0.
Apr 6 15:18:49.083: DHCPD: Sending DHCPOFFER to client 0100.4096.5745.a8 (10.99.1.50).
Apr 6 15:18:49.083: DHCPD: creating ARP entry (10.99.1.50, 0040.9657.45a8).
Apr 6 15:18:49.083: DHCPD: unicasting BOOTREPLY to client 0040.9657.45a8 (10.99.1.50).
Apr 6 15:18:54.079: DHCPD: DHCPREQUEST received from client 0100.4096.5745.a8.
Apr 6 15:18:54.083: DHCPD: Sending DHCPACK to client 0100.4096.5745.a8 (10.99.1.50).
Apr 6 15:18:54.083: DHCPD: creating ARP entry (10.99.1.50, 0040.9657.45a8).
Apr 6 15:18:54.083: DHCPD: unicasting BOOTREPLY to client 0040.9657.45a8 (10.99.1.50).
wo wo wo - hang on - It works !! The power of the Debug !
so the mega got-cha's
Hardware-address doesnt work (well - not very well for me)
and when you are putting in a client-identifier you must put a 01 for ethernet before it
and reformat the mac address, looks disgusting but it works !
Thanks
-----Original Message-----
From: ccie [mailto:ccie@gannons.net]
Sent: 06 April 2005 14:55
To: Keane, James
Subject: Re: DHCP - Quick Practice IP SERVICES Question for ya (2%)
Client:
Switch#sh run int fas 0/1
Building configuration...
Current configuration : 91 bytes
!
interface FastEthernet0/1
no switchport
ip address dhcp client-id FastEthernet0/1
end
Switch#sh int fas 0/1
FastEthernet0/1 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 000a.8a6c.8b00 (bia 000a.8a6c.8b00)
Server:
-------------------------------
ip dhcp pool AP
network 10.10.10.0 255.255.255.0
domain-name TEST.com
!
ip dhcp pool SW1
host 10.10.10.188 255.255.255.0
client-identifier 0100.0a8a.6c8b.00
!
There is two things to note here if you lab this up and enable debugs on the
server. Without the client-id FastEthernet0/1 the client ID sent is huge and
not very managable this command uses the mac address off the switch for
the client identifier. However there is gotcha here which I will leave
you to
figure out for yourself but it relates to the client id and the mac address
being different slightly see the ulr below:
In my case the DHCP request from the client sends the client ID even if
I dont ask it to. Clients may differ.
Regards,
Kevin
>Ok here is a fairly basic sinario
>
>I have a network 10.99.1.0/24
>I want the PCs 10.99.1.75 - 10.99.1.254
>I want an AP to be 10.99.1.50 (mac = 0040.9657.548a)
>
>So where is DHCP config below wrong ??
>
>service dhcp
>no ip dhcp conflict logging
>ip dhcp excluded-address 10.99.1.1 10.99.1.49
>ip dhcp excluded-address 10.99.1.51 10.99.1.74
>!
>ip dhcp pool ClientPOOL
> network 10.99.1.0 255.255.255.0
> dns-server 10.0.9.50
> domain-name MYBIGDOMAIN
> default-router 10.99.1.1
> lease 7
>!
>ip dhcp pool MyReservedAddress
> host 10.99.1.50 255.255.255.0
> hardware-address 0040.9657.548a ieee802
> client-name WirelessAP
> default-router 10.99.1.1
> domain-name MYBIGDOMAIN
> dns-server 10.0.9.50
>
>
>I keep getting the next index on the ClientPool for the AP ?!?!?!
>
>
>TESTLab-1#sho ip dhcp pool
>
>Pool ClientPool :
> Utilization mark (high/low) : 100 / 0
> Subnet size (first/next) : 0 / 0
> Total addresses : 254
> Leased addresses : 0
> Pending event : none
> 1 subnet is currently in the pool :
> Current index IP address range Leased addresses
> 10.99.1.82 10.99.1.1 - 10.99.1.254 0
>
>Pool MyReservedAddress :
> Utilization mark (high/low) : 100 / 0
> Subnet size (first/next) : 0 / 0
> Total addresses : 1
> Leased addresses : 1
> Pending event : none
> 1 subnet is currently in the pool :
> Current index IP address range Leased addresses
> 10.99.1.50 10.99.1.50 - 10.99.1.50 1
>
>
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