Cisco CCNP and CCIE Study Notes

Consider three routers named HOST, RELAY and DHCP-SERVER connected as in the following topology

HOST e0 ---- e0 RELAY e1 ---- e0 DHCP-SERVER

It is seen that the HOST which is configured to obtain the IP address for its ethernet0 interface using DHCP is failing to successfully get its address. Given the following configuration for the three routers in question, can you figure out what the problem is?

HOST

interface Ethernet0
 ip address dhcp

RELAY

interface Ethernet0
 ip address 10.10.10.1 255.255.255.0
 ip helper-address 20.20.20.2
!
interface Ethernet1
 ip address 20.20.20.1 255.255.255.0
!
ip forward-protocol udp bootpc
ip forward-protocol udp bootps

DHCP-SERVER

ip dhcp excluded-address 10.10.10.1
!
ip dhcp pool NET10
   network 10.10.10.0 255.255.255.0
!
interface Ethernet0
 ip address 20.20.20.2 255.255.255.0