Hello people,
I have a problem implementing ip helper-address, my DHCP client isn't recieving an ip address from the DHCP server. I use a Windows Server 2008 as DHCP server.
I've configured a 2811 router as inter vlan router and 2960 switch with a trunk interface to the router, and a access switchport to the 'S-EMINENT01' switch.
I created three subinterfaces (with dot1q encapsulation):
FA0/0.1 (VLAN1, NATIVE) 172.16.0.1/16
FA0/0.10 (VLAN10) 192.168.10.1/24
FA0/0.15(VLAN15) 192.168.15.1/24
Windows Server 2008 DHCP scope:
VLAN10: 192.168.10.1 - 192.168.10.254, excluded range: 192.168.10.1 - 192.168.10.9 /24
VLAN15: 192.168.15.1 - 192.168.15.254, excluded range: 192.168.10.1 - 192.168.10.9 /24
When I configure a static ip address (192.168.10.10) on my DHCP client, I'm able to ping until the FA0/0.1 (172.16.0.1) interface, but I'm still getting no DHCP ip address.
When I configure it within packet tracer, there are no problems at all and the DHCP client recieve the ip address properly. But when I use the same config on physical hardware, it won't work.
Topologie overview:
Note: the S-EMINENT01 is a non-configurable switch.
Config's:
Router:
Current configuration : 1237 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
ip cef
!
!
multilink bundle-name authenticated
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface FastEthernet0/0
no ip address
ip helper-address 172.16.2.10
duplex auto
speed auto
!
interface FastEthernet0/0.1
encapsulation dot1Q 1 native
ip address 172.16.0.1 255.255.0.0
ip access-group 1 in
ip helper-address 172.16.2.10
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.10.1 255.255.255.0
ip access-group 1 in
ip helper-address 172.16.2.10
!
interface FastEthernet0/0.15
encapsulation dot1Q 15
ip address 192.168.15.1 255.255.255.0
ip access-group 1 in
ip helper-address 172.16.2.10
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
shutdown
no fair-queue
clock rate 125000
!
interface Serial0/0/1
no ip address
shutdown
clock rate 125000
!
ip forward-protocol nd
!
!
ip http server
!
access-list 1 permit any
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
login
!
scheduler allocate 20000 1000
!
end
Switch:
Current configuration : 1770 bytes
!
version 12.2
service config
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Switch
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
system mtu routing 1500
ip subnet-zero
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
interface FastEthernet0/1
switchport access vlan 10
switchport mode access
spanning-tree portfast
!
interface FastEthernet0/2
switchport access vlan 15
switchport mode access
spanning-tree portfast
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet0/2
switchport trunk allowed vlan 1,10,15
switchport mode trunk
spanning-tree portfast trunk
!
interface Vlan1
ip address dhcp
ip helper-address 172.16.2.10
no ip route-cache
!
interface Vlan10
no ip address
ip helper-address 172.16.2.10
no ip route-cache
!
interface Vlan15
no ip address
ip helper-address 172.16.2.10
no ip route-cache
!
ip http server
ip http secure-server
!
control-plane
!
!
line con 0
line vty 5 15
!
end
Does anybody have any suggestions or tips? Maybe someone could upload an example configuration for my situation?
