Ip helper address and WLC

[mahesh18]

Hi Everyone,

WLC  has IP 10.10.10.5

AP has IP 10.10.10.6

AP is connected to switch which has say vlan 10 IP  192.168.50.2

AP manager interface has IP 192.168.50.1

USer is getting IP from ASA which has pool in subnet 192.168.50.x

Do i need to config ip helper command under the switch vlan 10?

Regards

MAhesh

[Daniel Ordóñez Flores]

No you don't need to do that.

[Leo Laohoo · Accepted solution]

WLC  has IP 10.10.10.5
AP manager interface has IP 192.168.50.1

This doesn't make any sense.  

Your AP management IP address and your WLC management IP address are in the same subnet.  Ok.  

So what IP address do you want your wireless user to have?  What I'd like to know is what is the IP address of the dynamice interface where the SSID is tied to.  This is where the IP address of the wireless client should have.

[mahesh18]

Hi Leo,

Sorry for above info.

Yes you are right WLC management and AP manager are in same subnet ---10.10.10.x

But WLC has interface called Wireless_visitor that has IP in the subnet 192.168.50.x.

We want wireless user to have 192.168.50.x.

Interface Wireless_visitor is dynamic interface with IP 192.168.50.1.

Switch has vlan that also has IP in subnet 192.168.50.x.

Regards

MAhesh

[Leo Laohoo]

But WLC has interface called Wireless_visitor that has IP in the subnet 192.168.50.x.
We want wireless user to have 192.168.50.x.
Interface Wireless_visitor is dynamic interface with IP 192.168.50.1.
Switch has vlan that also has IP in subnet 192.168.50.x.

Uhhhh ... Your Wireless_Visitor dynamic interface has the same IP address subnet as your switch?   I don't think this is going to work well.  Your switch, ideally, should have the same management IP address as the WLC management IP address.  

Your Dynamic Interface should have an IP Helper address in the configuration.  

[mahesh18]

Hi Leo,

Switch has 2 vlans one vlan has subnet 10.10.10.x which is switch management IP.

So yes we can say that switch's management IP is in same subnet as WLC..

Switch has second vlan that  has subnet 192.168.50.x.

Do we still need ip helper address in config?

Regards

MAhesh

[Leo Laohoo · Accepted solution]

Switch has second vlan that  has subnet 192.168.50.x.

Look at the default gateway of this subnet.  If the DHCP scope is hosted in the same physical unit as the default gateway then you don't.  If the DHCP scope is hosted in a separate physical unit, then you do.  

[mahesh18]

Switch and WLC have same default gateway which is hosted on the same single device.

Yes DHCP scope is also  hosted on the same unit  which has default gateway of switch and WLC.

Now i have better understanding of Wi Fi network which i am supporting

Regards

MAhesh

ASA.

[Leo Laohoo]

Thank you for taking the time to rate our posts, Mahesh.