Running Wireless in Two Sites

[IrishMann]

Hello All,

I currently have a WLC4402 in my HO with approx 20 AP, my AP's register with the WLC using a DNS lookup with CISCO-LWAPP-CONTROLLER static entry.

I would like to install a second WLC and 20 AP's in a Remote location, how can I configure the AP's in the remote location to register with the new local WLC. I do not want the AP's coming back across the wan to register with the HO WLC.

Hope this makes sense and any ideas would be much appreciated.

Cheers

Colin

[Salil Prabhu · Accepted solution]

Hi Colin,

Few options :

1) Change the DNS entry to reflect new WLC.

-DNS:The LAP attempts to resolve the DNS name

"CISCO-LWAPP-CONTROLLER.localdomain

CISCO-CAPWAP-CONTROLLER.locadomain

2)Option 43 :

http://cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00808714fe.shtml#t2

Note: If you configure option 43 and DNS the AP would prefer DNS in later codes..{atleast what I tested }.. Not sure which software version this go changed..But what documentation says it will prefer option 43.

Link:

http://cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a00806c9e51.shtml

2) IP helper address . { not recommeded but a dirty way to get APs joined to the WLC }.

switch#config t

switch(config)#int vlan x

switch(config-if)#ip helper-address

switch(config-if)#exit

switch(config)#ip forward-protocol udp 5246

switch(config)#ip forward-protocol udp 12222

switch(config)#ip forward-protocol udp 12223

switch(config)#ip forward-protocol udp 5247

{Please remove the above commands after AP joins }

3)Statically Assign the WLC IP on the AP by consoling in:

debug lwapp console cli

deb lwapp cli no-reload

lwapp ap controller ip address

Test lwapp controller ip

Default use/pass: cisco/Cisco

Replace lwapp with capwap if using 5.2 software or higher.

4) Leave the way it is and use Mobility configuration to move APs acorss right WLC.

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008064a294.shtml?

Note: Since your existing APs have joined the WLC, changing those values will not affect them .

Thanks.Salil

[tfraij · Accepted solution]

Hello Colin

as i understand

you have AP's in head office , say VLAN X

and in remote office they will be in new VLAN Y (subnet)

and vlan X and Y share the same DNS server.

- the suggestion would be on the DHCP scope of VLAN y ( remote the DNS server and DNS domain name),

and configure the DHCP option 43 to point to new WLC.

http://www.cisco.com/en/US/partner/tech/tk722/tk809/technologies_configuration_example09186a00808714fe.shtml

hope this answers your query

Best regards

Talal

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[IrishMann]

Hey Guys,

I like the DHCP option 43 to make the connection, by looking at the other options its most likely the easiest to implement.

Thnaks Again.

Colin

[George Stefanick]

Actually you only need to forward UDP 5246 for capwap and 12223 for lwapp. You dont need the those extra ports ...

[IrishMann]

Is this done at the switch port level ?

[Salil Prabhu]

Layer 3 vlan for the AP vlan.