01-18-2012 03:31 PM - edited 03-04-2019 02:57 PM
I have a cisco 850 that is not getting a WAN ip address thorugh DHCP. I have FE4 (The WAN port) set to get an ip address via DHCP, but when I do a test connection from CCP I get this error:
Checking interface IP address…failed
No Ip Address for the interface has been obtained. The interface is configured to obtain an ip address through dhcp. The remote end may not be configured with a dhcp server or the dhcp pool may be empty.
Recommended actions
Please contact your ISP or WAN administrator and check if the server has been configured to lease ip addresses to the client’s connection through DHCP. Retest connection
I know that the modem is providing an ip address via dchp, because I can plug my computer directly into the modem and get an ip address, so I think I may have missed a setting on the router. Here is he running config:
Building configuration...
Current configuration : 1851 bytes
!
version 12.4
service config
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname *Host*
!
boot-start-marker
boot-end-marker
!
no logging buffered
enable secret 5 $1$7sCe$otJJdbrbqgn/WkFF8Aqzt.
enable password *Password*
!
aaa new-model
!
!
aaa authentication login default local
aaa authorization exec default local
!
!
aaa session-id common
!
!
dot11 syslog
no ip routing
no ip dhcp use vrf connected
ip dhcp excluded-address 10.10.0.1 10.10.10.99
ip dhcp excluded-address 10.10.10.201 10.10.255.254
!
ip dhcp pool Vlan1
network 10.10.0.0 255.255.0.0
default-router 10.10.10.1
lease infinite
!
!
no ip cef
ip name-server 64.59.135.133
ip name-server 64.59.135.150
!
!
!
username admin privilege 15 secret 5 $1$almq$LzL55/3z.g3Sq9fpSvv8e0
!
!
archive
log config
hidekeys
!
!
!
!
!
interface FastEthernet0
no cdp enable
!
interface FastEthernet1
no cdp enable
!
interface FastEthernet2
no cdp enable
!
interface FastEthernet3
no cdp enable
!
interface FastEthernet4
description $ETH-WAN$
ip address dhcp client-id FastEthernet4
ip broadcast-address 0.0.0.0
ip nat outside
ip virtual-reassembly
no ip route-cache
duplex auto
speed auto
no cdp enable
!
interface Vlan1
ip address 10.10.10.1 255.255.0.0
ip broadcast-address 0.0.0.0
ip nat inside
ip virtual-reassembly
no ip route-cache
!
ip forward-protocol nd
!
ip http server
no ip http secure-server
ip nat inside source list 1 interface FastEthernet4 overload
!
access-list 1 remark INSIDE_IF=Vlan1
access-list 1 remark CCP_ACL Category=2
access-list 1 permit 10.10.0.0 0.0.255.255
!
control-plane
!
!
line con 0
exec-timeout 0 0
no modem enable
line aux 0
line vty 0 4
password *Password*
!
scheduler max-task-time 5000
no process cpu extended
no process cpu autoprofile hog
end
I think the problem may be the Firewall is not letting dhcp through (even tough I haven't set it up yet, and there are no rules in the firewall yet). But I'm not 100% sure about that.
Thanks for any help.
Solved! Go to Solution.
01-24-2012 08:55 AM
Although your config has no issues, below mentioned steps might help:
- Issue "shut" "no shut" on the Fa4 to bump the interface
- Remove "ip address dhcp client-id FastEthernet4" and just configure "ip address dhcp"
- Remove "ip broadcast-address 0.0.0.0" from Fa4 interface
- Shut down the router and Modem. Turn the modem on first and then turn the router after 5-10 min.
there might be another reason if all the above steps fail, You mentioned that your PC/laptop works fine and gets the ip address from modem, it could be because of the gigabit ethernet connection. Your modem might be looking for a 1000 Mbps speed which your laptop is capable but the router is not. Again, this might be a long shot but worth checking at your end.
Hope it helps
Neeraj
01-18-2012 03:44 PM
By all means, connect the router directly to ISP modedm, with no firewall.
If you do that, and still no address, try:
ip dhcp relay information check
And let us know.
01-18-2012 03:56 PM
The router is plugged directly into the modem. The firewall I'm talking about is the one built into the 850. Anyway I tried the ip dchp relay information check command via the cli and nothing happened.
01-19-2012 01:05 AM
Hi,
Can your turn on routing and CEF anyway:
-ip routing
-ip cef
Both these commands in config mode.
Regards.
Alain
01-19-2012 07:43 AM
I did that and still nothing happened.
01-19-2012 08:04 AM
Hi,
Please try not to create duplicate posts in order to avoid any confusion. Try these commands and try again:
ip dhcp pool Vlan1
import all
ip route 0.0.0.0 0.0.0.0 dhcp
#renew dhcp fa4
Sent from Cisco Technical Support iPhone App
01-19-2012 08:46 AM
Hi,
This was not to solve your dhcp problem but for the router to be routing anyway otherwise it won't even NAT.
I should have stated it sooner, sorry.
Regards.
Alain
01-24-2012 10:30 AM
Sorry, I meant:
no ip dhcp relay information check
01-24-2012 08:55 AM
Although your config has no issues, below mentioned steps might help:
- Issue "shut" "no shut" on the Fa4 to bump the interface
- Remove "ip address dhcp client-id FastEthernet4" and just configure "ip address dhcp"
- Remove "ip broadcast-address 0.0.0.0" from Fa4 interface
- Shut down the router and Modem. Turn the modem on first and then turn the router after 5-10 min.
there might be another reason if all the above steps fail, You mentioned that your PC/laptop works fine and gets the ip address from modem, it could be because of the gigabit ethernet connection. Your modem might be looking for a 1000 Mbps speed which your laptop is capable but the router is not. Again, this might be a long shot but worth checking at your end.
Hope it helps
Neeraj
01-24-2012 10:35 AM
Thanks, I tried those commands and now it is working.
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