Hi Pete,
Have a read of these docs, this should help you on your way;
Cisco Aironet 1200 Series
Wireless Virtual LAN Deployment Guide
From this doc;
http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00801444a1.html
Wireless, LAN (WLAN)
VLANs on Aironet Access Points Configuration Example
From this doc;
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a0080665ceb.shtml
Using VLANs with Cisco Aironet Wireless Equipment
From this doc;
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_configuration_example09186a00801d0815.shtml
Configuring Multiple SSIDs
From this doc;
http://www.cisco.com/en/US/products/hw/wireless/ps430/products_configuration_guide_chapter09186a00804e7f4a.html
Understanding Multiple SSIDs
The SSID is a unique identifier that wireless networking devices use to establish and maintain wireless connectivity. Multiple access points on a network or sub-network can use the same SSIDs. SSIDs are case sensitive and can contain up to 32 alphanumeric characters. Do not include spaces in your SSIDs.
You can configure up to 16 SSIDs on your 1200 series access point and assign different configuration settings to each SSID. All the SSIDs are active at the same time; that is, client devices can associate to the access point using any of the SSIDs. These are the settings you can assign to each SSID:
•VLAN
•Client authentication method
•Maximum number of client associations using the SSID
•RADIUS accounting for traffic using the SSID
•Guest mode
•Repeater mode, including authentication username and password
•Redirection of packets received from client devices
If you want the access point to allow associations from client devices that do not specify an SSID in their configurations, you can set up a guest SSID. The access point includes the guest SSID in its beacon.
If your access point will be a repeater or will be a root access point that acts as a parent for a repeater, you can set up an SSID for use in repeater mode. You can assign an authentication username and password to the repeater-mode SSID to allow the repeater to authenticate to your network like a client device.
If your network uses VLANs, you can assign one SSID to a VLAN, and client devices using the SSID are grouped in that VLAN.
Hope this helps!
Rob
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