03-07-2008 05:10 AM - edited 03-05-2019 09:36 PM
Hi all, If I have my network say on a 10.1.0.0/16 on vlan 1 and a dhcp server on that network also, and I have a scope on my dhcp server for this, say 10.1.0.1 to 10.1.1.254, If I create another scope on my dhcp server say 10.5.0.1 to 10.6.1.254 /24 will the hosts be able to see this scope on vlan 1 ?
03-07-2008 01:08 PM
Yes. It is a broadcast remember.
If you want the DHCP server to give out specific IP addresses to specific workstations then I would not put the DHCP server in the same VLAN as all of the other hosts.
Consider creating 3 VLANs.
1 for your servers
1 for your workstations 10.1.0.0/16 (I would make this a smaller network)
1 for your workstations 10.5.0.0/15 (make this a smaller network also)
Then configure ip helper on your vlan interfaces. The DHCP server will get a relay message from the gateway of the respective network and it will understand to supply the IP address accordingly.
vlan 2
name server-net-10.7.1.0/24
vlan 3
name workstation-net-10.1.0.0/16
vlan 4
name workstation-net-10.5.0.0/15
interface vlan 2
ip address 10.7.1.254 255.255.255.0
no shut
interface vlan 3
ip address 10.1.x.x/16
no shut
ip helper-address
interface vlan 4
ip address 10.5.x.x/16
no shut
ip helper-address
Not sure if that is what you are looking to do but good luck.
03-12-2008 08:01 AM
If the server is on say 10.112.0.0/16 network and there is a scope on the server for this same subnet and also a scaope of there for say 192.168.1.0/24 network, which scope would it give out? would it give the 10.112.0.0 scope out as the server has an interface on that subnet ?
03-12-2008 08:17 AM
It will give out whatever the forwarding network is. 10.112.0.0 in this case. 192.168.1.0/24 will never be assigned, unless you specify another vlan that contains hosts that will potentially be on this network. You will then have to setup the ip helper-address to forward the dhcp requests to the dhcp server.
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