[SOLVED] Setting a DHCP Scope on Cisco 2125 Wireless LAN Controller

[ceanth]

Hello all,

I am currently working with a Cisco Wireless LAN controller (2125) and I am trying to setup a DHCP scope so that my access points can obtain an IP address when they are plugged in.

I have tried through the GUI interface but it doesnt seem to work so i tried via console. The code which I am typing in is:


(Cisco Controller) >config dhcp create-scope CGTest
(Cisco Controller) >config dhcp address-pool CGTest
Incorrect input! Use 'config dhcp address-pool <scope name> <start> <end>'
(Cisco Controller) >config dhcp address-pool CGTest 192.168.95.100 192.168.95.20
0
(Cisco Controller) >config dhcp enable CGTest
DHCP scope parameters are invalid - Network or Netmask is not configured.
(Cisco Controller) >config dhcp CGTest 192.168.95.253 255.255.255.0
Incorrect usage. Use the '?' or <TAB> key to list commands.
(Cisco Controller) >config dhcp network CGTest 192.168.95.253 255.255.255.0
Error in network/netmask setting


The issue seems to be with setting up the "network" field of the scope.

Having checked the following guide:

http://www.cisco.com/en/US/docs/wire...html#wp1152559

“Step 7 In the Network field, enter the network served by this DHCP scope. This is the IP address used by the management interface with Netmask applied, as configured on the Interfaces page.”

My Management interface is set to:

192.168.95.253
255.255.255.0
192.168.95.1

This might be something really simple but i have limited Cisco knowledge and i can seem to figure out where i am going wrong.

Thanks,

-c

[Prometheus_Fire]

Have you tried: config dhcp network CGTest 192.168.95.0 255.255.255.0 after: config dhcp address-pool CGTest 192.168.95.100 192.168.95.20.

Regards,

Pro

[ceanth]

Hi Prometheus, ill give that a go and get back to you.I dont have access to my kit just yet.

Why would it be 192.168.95.0 if the management interface has been set to 192.168.95.253?

[Prometheus_Fire]

The config dhcp network <scope> <network> <netmask> command doesn't set the management interface, it sets the network and subnet mask.

[ceanth]

Prometheusn that worked :) Thank you very much

Thanks for that. Im not Cisco qualified but is the network address (192.168.95.0) always in that format. E.g. if i change the DHCP scope to 192.168.96.0 would the network address change to 192.168.96.0?

I was under the impression that the network address was for the management card but its clearly not. So what is the purpose of the network and netmask address?

Again, apologies if this is simpy answer.

-c

[Prometheus_Fire]

Hi ceanth,

That command sets the network that the scope applies to. The management interface refers to the IP you set on a VLAN interface in the defined network.

The network address simply refers to the subnet you want the DHCP scope to serve.

Also, you've misconfigured your dhcp address-pool. The first IP listed should be the start of the pool and the second should be the last IP in the pool. E.g. config dhcp address-pool CGTest 192.168.95.20 192.168.95.100 rather than: config dhcp address-pool CGTest 192.168.95.100 192.168.95.20.

NB: If you're happy the issue is resolved, don't forget to mark it as SOLVEd.

[ceanth]

Hi Prometheus, that makes perfect sense.

How do i mark this thread as Solved? I couldnt seem to see any buttons or anything.

Thanks,
C

[Prometheus_Fire]

I'm not sure, Johnwill told me that thread starters could mark their threads as solved! :-/

[ceanth]

I figured it out :)