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WESM zl Management and Configuration Guide WT.01.28 and greater

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Introduction
Radio Ports
The two radios on a single RP generally support the same WLANs, as shown in
Table 1-5. However, using advanced mode configuration, you can enable different
WLANs on an RP’s two built-in radios; in this case, a single RP with two radios can
support up to 32 WLANs. Using advanced mode configuration raises several con-
cerns that are discussed in Chapter 4: “Wireless Local Area Networks (WLANs).”
Note Although, a single RP can support up to 32 WLANs, the Wireless Edge Services zl
Module can support up to 256. You must use advanced mode configuration to enable
different WLANs on RPs.
Table 1-5. BSSIDs and WLANs on the ProCurve RPs
Beaconing
An RP broadcasts beacon frames to announce its presence to wireless stations. In an
open system, a beacon includes the SSID for a WLAN to which the RP offers a
connection, as well as other information about the WLAN such as:
■ the authentication and encryption method
■ a timestamp for synchronization
■ supported data rates and parameters for signaling frequencies
■ the interval at which stations should expect beacons
■ the delivery traffic indication message (DTIM), which informs power-saving
stations whether they must “wake up” to receive buffered packets
■ priority queue settings if WMM is used
In a closed system, beacons include all this information except the SSID, which
stations must send in a probe request before they can associate to the WLAN.
The destination address for a beacon is the broadcast address. The source address is
the BSSID on which the RP carries traffic for the WLAN.
If the RP supports multiple WLANs, it may send different beacons, each containing
a different SSID. However, the RP can transmit only as many different beacon frames
as it has BSSIDs. This means that even if a ProCurve RP supports more than four
WLANs, it can advertise only the first four.
ProCurve RP BSSID WLANs (Normal
Mode)
WLANs (Advanced
Mode)
210 4 16 16
220 8 (4 on each radio) 16 32
230 8 (4 on each radio) 16 32