SWT
GIGABIT/FAST ETHERNET SWITCH TYPE SWT 51/137
USER GUIDE - M0SWTA1903Iv09 - V09 March 2019
FIGURE 27 VLANs menu configuration page
The screen associated to the VLANs menu has three distinct sections, which are described
below.
There is a global parameter that affects all the VLANs.
• Overlapping Enable. It establishes the switch internal operation mode as regards
the management of the MAC addresses of the different VLANs. The operation
mode is IVL (Independent VLAN Learning) by default. The equipment operates in
SVL mode (Shared VLAN Learning) with the option selected.
The SVL (Overlapping Enabled) mode is necessary when using topologies with
several VLANs when there is an interface with access to more than one of the
configured VLANs, that is, that the VLANs share some user interface, and that
the clients operate with UNTAGGED frames. In these cases, the traffic exclusion
is done through the access control lists determined for each one of the interfaces
(see the VID ACL parameter in section 5.4).
FIGURE 28 shows an example for using the Overlapping Enable parameter.
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