changing dhcp server from win 2008 to cisco
Hello,
I am looking to change my dhcp server from domain controller to cisco firewall. I have enabled dhcp server on cisco 5510 and turned the dhcp server service off on the domain controller. When I restart the pc expecting it to get ip from cisco it does not work.
However When I turn back on the dhcp server service on the server (win 2008) everything is fine.
Attached is a pic of the cisco dhcp server settings
I am wondering am I supposed to do something else. I thought when I enable dhcp server on the firewall .. it will automatically assign ip.
dhcpcisco.JPG
I am looking to change my dhcp server from domain controller to cisco firewall. I have enabled dhcp server on cisco 5510 and turned the dhcp server service off on the domain controller. When I restart the pc expecting it to get ip from cisco it does not work.
However When I turn back on the dhcp server service on the server (win 2008) everything is fine.
Attached is a pic of the cisco dhcp server settings
I am wondering am I supposed to do something else. I thought when I enable dhcp server on the firewall .. it will automatically assign ip.
dhcpcisco.JPG
ASKER
Hey John
I guess my question is how to get the workstations to look for the cisco..
I realized that server is better but I temporarily I need to use the cisco as the dhcp server
I guess my question is how to get the workstations to look for the cisco..
I realized that server is better but I temporarily I need to use the cisco as the dhcp server
I think workstations will need to temporarily disjoin from the domain and then map folders once connected to the cisco.
Test with and off-domain computer.
Test with and off-domain computer.
When I restart the pc expecting it to get ip from cisco it does not work.
You haven't really posted much info on your network configuration.
- Do you have multiple subnets? If so have you configured the DHCP helpers on your network equipment to forward DHCP traffic to the Cisco DHCP server instead of or as well as the Windows DHCP server? DHCP being a broadcast technology cannot go beyond its broadcast network without a DHCP helper configuration setup. If everything is on the same subnet this shouldn't be a problem.
- Have you performed a packet trace from the client perspective and a tcpdump from the Cisco appliance and checked that queries are being sent/received correctly?
You can add a IP Helper config for your network. This will force the clients to look at address before others
When you say "it does not work.", what happens?
1. Clients end up with an IP of 0.0.0.0?
2. Clients end up with an APIPA address (169.254.x.x)?
3. Clients keep the same IP address that they had leased earlier for the Windows DHCP server?
4. Something else?
1. Clients end up with an IP of 0.0.0.0?
2. Clients end up with an APIPA address (169.254.x.x)?
3. Clients keep the same IP address that they had leased earlier for the Windows DHCP server?
4. Something else?
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Workstations will first have to look to the Cisco to get an IP and then connect to the domain.
A server just does a better job of this.