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Cooper Bussmann BU-245U-E Wireless Ethernet & Device Server User Manual
3.12 Spanning Tree Algorithm
The bridge “Spanning Tree Protocol”function was introduced to handle network loops and provide redundant paths in networks. To enable tick the
STP box on any “WDS Connections”you have configured on the “Repeaters” configuration page.
For example, consider this network with a redundant wireless link.If the bridge Spanning Tree Protocol is enabled, one of the two wireless links
will be disabled - that is, all wireless data will be transferred by one link only.If the active link fails, the other link will automatically start
transferring the wireless data.
The Spanning Tree Protocol implemented is IEEE 802.1d compatible.The algorithm forms a loop-free network by blocking traffic between
redundant links in the network.These blocked links are placed in a standby condition, and may be automatically enabled to repair the network if
another link is lost.The Spanning Tree Algorithm maintains a single path between all nodes in a network, by forming a tree-like structure.The
Bridge Priority determines where the node sits in the tree.A Bridge configured with the lowest priority (0) will become the root node in the
network, and will direct traffic between each of its branches.The root node is typically the unit that handles the majority of traffic in the network.
The BU-245U-E is configured with a Bridge Priority of 32768 by default.The intention is to reduce traffic that the BU-245U-E must handle, by
placing it at the branch level in the network tree.As a branch, the BU-245U-E needs only pass traffic to devices that are its “leaves.”
There is some overhead in maintaining a network utilizing the Spanning Tree Algorithm.Users wishing to increase their throughput, at the expense
of redundancy should disable Spanning Tree.The Spanning Tree Protocol can be configured on the Repeaters configuration page.
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