Spanning Tree Setup; Filtering - Multitech MultiFRAD FR221 User Manual

MultiFRAD User Guide

Spanning Tree Setup

When the Bridging Enable option is enabled, the Spanning Tree Setup dialog box controls
transparent bridging; however, if there are any loops or redundant links in the internetwork, the
Spanning Tree Algorithm Enable option must also be enabled. Spanning Tree is a method of
transparent bridging, as opposed to source route bridging which the MultiFRAD does not support.
The MultiFRAD defaults with one logical WAN port mapped to a DLCI. It is not necessary to map this
port to a DLCI; however, care should be taken if an additional logical WAN is created. An additional
WAN will default to a disabled state, and it must be mapped to a DLCI before it can be used. In most
applications, the forwarding state should be enabled on the first logical WAN, and blocking should be
set up on any additional WANs. While in operation, the MultiFRAD will automatically transition from
blocking to forwarding, and vice versa, as necessary.

Filtering

Clicking the Filters button on the Spanning Tree Setup dialog box displays the Spanning Tree
Filtering screen. Here, you can toggle the packet Default Action from forward to filter.
Clicking the Add (+) button displays the Add Spanning Tree Filter dialog box, which enables you to
designate the source or destination Ethernet Address, the Physical Port (LAN, or WAN 1), and the
type of action desired; i.e., Forward Destination Address (default), Filter Destination Address,
Forward Destination Address, or Forward Source Address. Clicking OK displays your selections on
the Spanning Tree Filtering dialog box; however, note that to save changes permanently you will
need to click OK on the Spanning Tree Filtering dialog box and then also click OK on the Spanning
Tree Setup screen. (If you forget, you will be queried...)
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