WESM zl Management and Configuration Guide WT.01.28 and greater

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Introduction
ProCurve Wireless Edge Services zl Module
Figure 1-8 shows a wireless network that separates VLANs used on the wireless
network from VLANs used on the wired network. In this network, the Wireless Edge
Services zl Module routes traffic from the wireless network.
Figure 1-8. Reserving VLANs for Wireless Stations—Wireless Edge Services zl
Module Routes
Reserving VLANs for Wireless Users in a Network with Multiple
Wireless Edge Services zl Modules
A network that has more than one Wireless Edge Services zl Module introduces
another factor that you must consider: roaming between the modules. To facilitate
roaming and consistent network services, every module should assign the same
WLAN to the same VLAN (subnetwork) when possible.