Hi Bao,

The 1230 is not a Lightweight AP, but can be upgraded to LWAPP with the A Radio model listed below (Note that this model is EOS/EOL) this is probably not the best choice for your studies;

Solution Requirements

Migration from autonomous access point mode to lightweight mode is possible on these Cisco Aironet access point platforms:

All 1130AG access points

All 1240 AG access points

For all IOS-based 1200 series modular access point (1200/1220 Cisco IOS Software Upgrade, 1210 and **1230 AP**) platforms, it depends on the radio:

if 802.11G, MP21G and MP31G are supported

if 802.11A, RM21A and RM22A are supported

The 1200 series access points can be upgraded with any combination of supported radios: G only, A only, or both G and A.

All 1310 AG access points

From this good doc;

http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00804fc3dc.html

Cisco Aironet 1200 Series Access Point Ordering Guide

http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00800c9435.html

EOS & EOL for the Cisco Aironet 1200 Series 802.11a Access Points

http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_eol_notice0900aecd801e5303.html

Understanding the Lightweight Access Point Protocol (LWAPP)

http://www.cisco.com/en/US/netsol/ns340/ns394/ns348/ns337/networking_solutions_white_paper0900aecd802c18ee.shtml

Lightweight Access Point FAQ

http://www.cisco.com/en/US/products/ps6306/products_qanda_item09186a00806a4da3.shtml

Lightweight AP (LAP) Registration to a Wireless LAN Controller (WLC)

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

**You are probably better off with something like the LAP 1131. Have a look here;

http://www.cisco.com/en/US/products/hw/wireless/products_category_buyers_guide.html#access_points

Hope this helps! I noticed your other post regarding the WLC suggestions and have responded there as well :)

Rob