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10-16-2006 12:42 AM
10-16-2006 12:42 AM
Solved! Go to Solution.
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10-16-2006 01:18 AM
10-16-2006 01:18 AM
SolutionIts an easy thing to do.
Say you have a switch with 3 Vlans,
Vlan1: IP 192.168.1.0/24
Vlan2: IP 192.168.2.0/24
VLan3: IP 192.168.3.0/24
You untag some ports on that switch for clients in different Vlan, and in the Vlan you configure the IP Helper-Address pointing to your DHCP server.
Your Switch configuration will be something like this:
Switch(config)#vlan 1 ip add 192.168.1.1/24
Switch(config)#vlan 1 ip helper-address 192.168.1.2 (DHCP server IP)
Switch(config)#vlan 2 ip add 192.168.2.1/24
Switch(config)#vlan 2 ip helper-address 192.168.1.2
Switch(config)#vlan 3 ip add 192.168.3.1/24
Switch(config)#vlan 3 ip helper-address 192.168.1.2
Now on the DHCP server, create 3 Scopes,
1st: Network 192.168.1.0 mask 255.255.255.0 and specify the range (keep some IPs for static assignment) , and the router attribute is 192.168.1.1 (default gateway for Vlan1)
2dn: Network 192.168.2.0 mask 255.255.255.0 and specify the range and the router attribute is 192.168.2.1 (default gateway for Vlan2)
3rd: Network 192.168.3.0 mask 255.255.255.0 and specify the range and the router attribute is 192.168.3.1 (default gateway for Vlan2)
Now any DHCP request will come from any Vlan, the DHCP will give the proper IP based on the Vlan that DHCP request came from.
Good Luck !!!
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10-17-2006 06:09 AM
10-17-2006 06:09 AM
Re: IP helper address and Server config
Here is my actual setup.
# ip address 10.150.48.1 255.255.240.0
# ip helper-address 192.168.2.2
# untagged B7
On server
Scope
10.150.48.2 - 10.150.48.7
router 10.150.48.1
Whats wrong here?
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10-17-2006 06:14 AM
10-17-2006 06:14 AM
Re: IP helper address and Server config
Here is my actual setup.
(vlan-7)# ip address 10.150.48.1 255.255.240.0
(vlan-7)# ip helper-address 192.168.2.2
(vlan-7)# untagged B7
On server
Scope
10.150.48.2 - 10.150.48.7
router 10.150.48.1
Whats wrong here?
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10-17-2006 03:43 PM
10-17-2006 03:43 PM
Re: IP helper address and Server config
Could be that that segment does not have a route to that vlan?
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10-17-2006 04:09 PM
10-17-2006 04:09 PM
Re: IP helper address and Server config
Your setup os fine from the switch side and server side also.
What yo ucan do is, assign a static route to one host on Vlan7 with the same parameters you posted in the scope like:
IP: 10.150.48.5
Mask: 255.255.240.0
Gateway: 10.150.48.1
And now try to pinig your gateway, your DHCP server, and do some test and i think you will find out whats the problem.
Otherwise i can ask you to attach the config of your switch here.
Good Luck !!!
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10-18-2006 09:28 AM
10-18-2006 09:28 AM
Re: IP helper address and Server config
Scenario:
The 5300 default gateway is the vlan 1 ip, we have a vlan 11 with a 172.16.2.156 for the backbone address.
DCHP server has the ip 10.128.144.7 which is also the gateway or router address for the clients. Ayudar por favor..
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