HP ProCurve 520wl Wireless Access Point - Manual (Page 66)

Bridge Configuration Settings
4-17
Figure 4-18 Figure 4-18 Figure 4-18 Figure 4-18 Static MAC Filter Configuration Screen Static MAC Filter Configuration Screen Static MAC Filter Configuration Screen Static MAC Filter Configuration Screen
information masks information masks information masks information masks
The MAC Address combines with the Bit Mask to create a filter. Wired MAC Addresses and their associated masks, and
wireless MAC Addresses and their associated masks are known generically as “information masks” and are written in the
following format:
MAC Address: 00 02 10 12 34 56
Bit Mask: FF FF FF FF 00 00
In this example, all MAC Addresses starting with 00 02 10 12 are filtered.
spanning tree protocol spanning tree protocol spanning tree protocol spanning tree protocol
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 is 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 WL520 devices to control the path of communication within the network, avoiding loops and following a spanning tree
structure.
NOTE:
For more information on Spanning Tree protocol, please see Section 8.0 of the IEEE 802.1d standard.
broadcast storms and storm thresholds broadcast storms and storm thresholds broadcast storms and storm thresholds broadcast storms and storm thresholds
Storm Threshold is an advanced Bridge setup option that you can use to protect the network against data overload by:
Q
Specifying a maximum number of frames per second as received from a single network device (identified by its MAC
address).
Q
Specifying an absolute maximum number of messages per port.
The ‘Storm Threshold’ parameters allow you to specify a set of thresholds for each port of the WL520, 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 WL520 will ignore all
subsequent messages issued by the particular network device, or ignore all messages of that type.
–
Address Threshold Address Threshold Address Threshold Address Threshold . Enter the maximum allowed number of packets per second.
– Ethernet Threshold Ethernet Threshold Ethernet Threshold Ethernet Threshold Enter the maximum allowed number of packets per second.
– Wireless-Slot A Threshold Wireless-Slot A Threshold Wireless-Slot A Threshold Wireless-Slot A Threshold Enter the maximum allowed number of packets per second.
– Wireless-Slot B Threshold Wireless-Slot B Threshold Wireless-Slot B Threshold Wireless-Slot B Threshold Enter the maximum allowed number of packets per second.