Spanning Tree; Storm Threshold - Avaya AP-7 User Manual

To configure the AP's bridge parameters, use the Bridge tab. This tab has four subtabs.

Spanning Tree

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Storm Threshold

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Intra BSS Sub-tab
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Packet Forwarding
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Spanning Tree
A Spanning Tree is used to avoid redundant communication loops in networks with multiple
bridging devices. Bridges do not have any inherent mechanism to avoid loops, because having
redundant systems is a necessity in certain networks. However, redundant systems can cause
Broadcast Storms, multiple frame copies, and MAC address table instability problems.
Complex network structures can create multiple loops within a network. The Spanning Tree
configuration blocks certain ports on AP devices to control the path of communication within the
network, avoiding loops and following a spanning tree structure.
For more information on Spanning Tree protocol, please see Section 8.0 of the IEEE 802.1d
standard. The Spanning Tree configuration options are advanced settings. Avaya recommends
that you leave these parameters at their default values unless you are familiar with the
Spanning Tree protocol.
Storm Threshold
Storm Threshold is an advanced Bridge setup option that you can use to protect the network
against data overload by:
Specifying a maximum number of frames per second as received from a single network
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device (identified by its MAC address).
Specifying an absolute maximum number of messages per port.
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The Storm Threshold parameters allow you to specify a set of thresholds for each port of the
AP, identifying separate values for the number of broadcast messages/second and Multicast
messages/second.
When the number of frames for a port or identified station exceeds the maximum value per
second, the AP will ignore all subsequent messages issued by the particular network device, or
ignore all messages of that type.
Address Threshold: Enter the maximum allowed number of packets per second.
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Ethernet Threshold: Enter the maximum allowed number of packets per second.
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Wireless Threshold: Enter the maximum allowed number of packets per second.
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Bridge Configuration
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