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

WirelessModifying Virtual Access Point Settings4If you use Static WEP, the following rules apply:• All client stations must have the Wireless LAN (WLAN) security set to WEP,and all clients must have one of the WEP keys specified on the access pointin order to de-code AP-to-station data transmissions.• The access point must have all keys used by clients for station-to-APtransmit so that it can de-code the station transmissions.• The same key must occupy the same slot on all nodes (access point andclients). For example if the access point defines abc123 key as WEP key 3,then the client stations must define that same string as WEP key 3.• Client stations can use different keys to transmit data to the access point.(Or they can all use the same key, but this is less secure because it meansone station can decrypt the data being sent by another.)• On some wireless client software, you can configure multiple WEP keys anddefine a client station “transfer key index”, and then set the stations toencrypt the data they transmit using different keys. This ensures thatneighboring access points cannot decode each other’s transmissions.• You cannot mix 64-bit and 128-bit WEP keys between the access point andits client stations.Table 12 describes the WEP fields.Table 12FieldWEP Field DescriptionsDescriptionTransfer KeyIndexSelect a key index from the drop-down menu. Key indexes 1through 4 are available. The default is1.The transfer key index indicates which WEP key the accesspoint will use to encrypt the data it transmits.Key LengthSpecify the length of the key by clicking one of the radiobuttons:• 64 bits• 128 bitsCisco AP 541N Dual-band Single-radio Access Point Quick Start Guide 64