eap testing

Hi every body,, I have fallen into a serious trouble :( I have configured a proxy server, that is proxying all incoming requests to two backend servers. in 'proxy.conf' i have configured 'type=client-balance' so that it can work with EAP. Now i wanna do load testing of this configuration with EAP-TLS. So with configuration i need to have a lot of NAS, with different IP's. But I only have 2. Could any one please help me in this situation. Could please suggest me a tool or a guideline to achieve my goal. Thanks in advance