DHCP Relay w/ Windows 2000

[STF26]

I am trying to do a simple relay with a cisco 3620 and a windows 2000 server. We setup the scope on the windows 2000 server and activated however the clients on the other network cannot pull the dhcp from the server.

When the logging is on the 3620 we get two statements when the client tries to pull the IP. A DHCPD: giaddr and the address of the server. Then a DHCP: Boot Request fowarded to the DHCP server.

Their are entries in the log on the windows 2000 dhcp server about the request but they do not make much sense.

Does anyone have any sample configs or ideas. We used the ip helper-address on the second interface that we want to pull from the primary interface.

Thanks

 

[vipergg]

Did you put the ip helper addresses on the subnet interfaces on the router that you need to get to the dhcp server ? You need these if server is on a different subnet than the clients .

 

[STF26]

You are suggesting to assign a staic ip to the client machine and then ping the DHCP server on the other network? OK I will try this.

For some reason, I think that the 2000 DHCP server thinks that the router is a roque DHCP server and not responding to requests.

I wanted to give some more facts to make it easier to understand.

Router-
eth0/0 192.168.1.0 / 24
no ip helper
(DHCP Server on this network 192.168.1.250)

eth0/1 192.168.5.0 /24
ip helper-address 192.168.1.250

global-
ip foward-protocol udp bootpc

Thanks for any info

 

[AdmanOK]

Does the DHCP server have a scope with addresses in the 192.168.5.0/24 network?

 

[STF26]

Yes it is all setup and ready to rock.

 

[bierhunter]

If using Active Directory, did you remember to authorize the new scope? That's thrown me off several times. I always forget that scopes have to be activated and authorized.

 

[STF26]

51,12/15/03,10:50:46,Authorization succeeded,,stfconsulting.net,
63,12/15/03,11:57:07,Restarting rogue detection,,,
57,12/15/03,15:55:55,Server found in our domain,192.168.1.2,stfconsulting.net,

These are the errors on the dhcp log and the scope is activated. Plus the server is authed.

 

[AJ1982]

Can u post a full config of your routers?

===

Fatman Superstar (Andrew James)

CCNA,
(CCNA Cisco Academy Instructor Trained)

 

[STF26]

Current configuration : 1055 bytes
!
version 12.3
service timestamps debug datetime
service timestamps log uptime
no service password-encryption
!
hostname STF
!
boot-start-marker
boot system flash c3620-is-mz.123-5.bin
boot-end-marker
!
enable secret 5 $1$yuro$jYJe6yA91Y978.n1.KL/Q.
enable password network
!
no aaa new-model
ip subnet-zero
!
!
!
modemcap entry usr56k:MSC=&f1s0=1
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
ip address 192.168.1.2 255.255.255.0
no ip mroute-cache
full-duplex
!
interface Serial0/0
ip address x.x.x.x 255.255.255.252
no ip mroute-cache
no cdp enable
!
interface Ethernet0/1
ip address 192.168.5.2 255.255.255.0
ip helper-address 192.168.1.250
no ip mroute-cache
full-duplex
no cdp enable
!
no ip http server
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0/0
!
!
!
!
voice-port 1/0/0
!
voice-port 1/0/1
!
!
!
!
line con 0
line aux 0
session-timeout 1
password network
login
modem InOut
modem autoconfigure type usr56k
transport input all
autohangup
stopbits 1
speed 57600
line vty 0 4
password password
login
!
!
!
end

 

[AJ1982]

You seem to lack routing information between your two subnets. Can any traffic pass between them.

Routing protocol or static routing between subnets?

Ta

AJ

===

Fatman Superstar (Andrew James)

CCNA,
(CCNA Cisco Academy Instructor Trained)

 

[STF26]

Good point, Gentleman
Let me add the route and I will get back to you.

Thanks

 

[AJ1982]

Could you post a new full config if ur still having troubles.

Ta

AJ

===

Fatman Superstar (Andrew James)

CCNA,
(CCNA Cisco Academy Instructor Trained)

 

[NetEng631]

Did you disable the DHCP service on your router. It is enabled by defualt.

From the web site:

By default, the Cisco IOS DHCP Server feature is enabled on your router. If the feature is disabled, use the following command in global configuration mode to reenable the Cisco IOS DHCP Server feature on your router:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1830/products_feature_guide09186a008008743b.html

disable the service by

no service dhcp

 

[STF26]

Thanks for all of your tips! Everything works great! Thanks

 

[bierhunter]

What was the solution? I'm dieing to learn what you found out. Thanks.