WESM zl Management and Configuration Guide WT.01.XX and greater

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Introduction
Radio Ports
Figure 1-20. ESS
Similarly, when configuring the Wireless Edge Services zl Module, you are
often more interested in the WLAN to which users connect than in the
particular RP to which a user connects at any given moment.
SSID Versus BSSID
As indicated above, the SSID identifies a group of BSSs that make up a single
WLAN. All frames transmitted in a WLAN are marked with this SSID. Wireless
media can be very busy, and wireless devices limit the number of superfluous
frames that they must process by accepting only frames marked with the SSID
of their WLAN.