Cisco AP541N Dual-band Single-radio Access Point Administration ...

WirelessModifying Virtual Access Point Settings4Table 11FieldVAP Field DescriptionsDescriptionRADIUS IPAddress 1–3Enter up to three IPv4 addresses to use as the backupRADIUS servers.If authentication fails with the primary server, eachconfigured backup server is tried in sequence. The addressmust be valid in order for the access point to attempt tocontact the server.RADIUS KeyEnter the RADIUS key in the text box.The RADIUS Key is the shared secret key for the globalRADIUS server. You can use up to 63 standard alphanumericand special characters. The key is case sensitive, and youmust configure the same key on the access point and on yourRADIUS server. The text you enter is displayed as large dotcharacters to prevent others from seeing the RADIUS key asyou type.RADIUS Key1–3Enable RadiusAccountingEnter the RADIUS key associated with the configuredbackup RADIUS servers. The server at RADIUS IP Address-1uses RADIUS Key-1, RADIUS IP Address-2 uses RADIUSKey-2, and so forth.Select this option to track and measure the resources aparticular user has consumed such as system time, amountof data transmitted and received, and so forth.If you enable RADIUS accounting, it is enabled for theprimary RADIUS server and all backup servers.VAPYou can configure up to 16 VAPs for each wireless radio.VAP0 is the physical wireless radio interface. To disableVAP0, you must disable the wireless radio. Due to thedependency of the WDS links with the VAP0 security mode,VAP0 cannot be configured to None, Static WEP, or 802.1X ifthe WDS links have WPA Personal as the security mode. Ifyou need to change the security of VAP0 from WPA Personalor WPA Enterprise to None, Static WEP, or 802.1X, thenremove the WPA security mode for all the WDS links.Cisco AP 541N Dual-band Single-radio Access Point Quick Start Guide 58