Avaya AP-6 - Manual (Page 178)

Management
4-80 Avaya Wireless AP-4/5/6 User’s Guide
Figure 4-12. DHCP Options: Setting the Boot Server Host Name
4. Add the Boot Server host name and Boot Filename parameters to
the Active Options list.
5. Set the value of the Boot Server host name parameter to the host
name or IP Address of the TFTP server. For example: 11.0.0.7.