From: John Aitken (john.aitken@gmail.com)
Date: Sat Apr 22 2006 - 18:35:56 GMT-3
Can anyone help clarify a question I have on DHCP between routers, and
manual mappings.
If I have two routers, one acting as a DHCP server one as a client, both
connected on the same vlan (On a 3550) and the client ethernet interface
requiring a manual mapping I thought the configuration would be:
Server:
ip dhcp pool POOL-NAME
host a.b.c.d /24
hardware-address aaaa.bbbb.cccc
Client
Interface Fa0/0
ip address dhcp
And that would be enough, but this doesn't work. My debug output on the
server is something like:
*May 5 18:24:18.590: DHCPD: DHCPDISCOVER received from client
0063.6973.636f.2d30.3030.362e.6437.3536.2e32.3564.302d.4661.312f.30 on
interface FastEthernet0/0.
*May 5 18:24:18.590: DHCPD: Seeing if there is an internally specified pool
class:
*May 5 18:24:18.590: DHCPD: htype 1 chaddr 0006.d756.25d0
*May 5 18:24:18.590: DHCPD: remote id 020a00000a0a020100000000
*May 5 18:24:18.590: DHCPD: circuit id 00000000
*May 5 18:24:18.590: DHCPD: there is no address pool for 10.10.2.1.
*May 5 18:24:51.950: DHCPD: checking for expired leases.
*May 5 18:25:18.082: DHCPD: Sending notification of DISCOVER:
*May 5 18:25:18.086: DHCPD: htype 1 chaddr 0006.d756.25d0
*May 5 18:25:18.086: DHCPD: remote id 020a00000a0a020100000000
*May 5 18:25:18.086: DHCPD: circuit id 00000000
I can get it working by configuring a client identifier on each end :
Server
ip dhcp pool POOL-NAME
host a.b.c.d /24
client-identifier 01aa.aabb.bbcc.cc
Client
Interface Fa0/0
ip address dhcp client-id fastethernet Fa0/0
This seems somewhat long winded to me and the documentation I can find
doesn't indicate that this is the solution I should be using (Seems like an
MS solution).
Any help appreciated.
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