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To configure Traffic Control,first select the Switch’s Unit ID number from the pull down menu and then a group of ports by using the Grouppull down
menu.Finally,enable or disable the
Broadcast Storm,Multicast Storm and Destination Unknownusing their corresponding pull-down menus.
The purpose of this window is to limit too many broadcast,multicast or unknown unicast packets folding the network.Each port has a counter that tracks the
number of broadcast packets received per second,and this counter is cleared once every second.If the broadcast,multicast or unknown unicast storm control is
enabled,the port will discard all broadcast,multicast or unknown unicast packets received when the counter exceeds or equals the Threshold specified.
The
Threshold value is the upper threshold at which the specified traffic control is switched on.This is the number of Broadcast,Multicast or DLF packets,in
Kpps (kilopackets per second),received by the Switch that will trigger the storm traffic control measures.The
Threshold value can be set from 0 to 255
kilopackets per second.The default setting is 128.The settings of each port may be viewed in the
Traffic Control Tablein the same window.Click Apply to
implement changes made.
6-16 Port Security
A given port's (or a range of ports') dynamic MAC address learning can be locked such that the current source MAC addresses entered into the MAC address
forwarding table can not be changed once the port lock is enabled.The port can be locked by using the Admin Statepull-down menu to Enabled,and clicking
Apply.
Port Security is a security feature that prevents unauthorized computers (with source MAC addresses) unknown to the Switch prior to locking the port (or
ports) from connecting to the Switch's locked ports and gaining access to the network.
Figure 6- 45.Port Security Settings and Port Security Table window
The f
ollo
wing parameters can be set:
Parameter Description
Unit Choose the Switch ID n
umber of the Switch in the switch stack to be modified.
Fr
om/T
o
A consecutiv
e gr
oup of por
ts ma
y be configur
ed star
ting with the selected port.
Admin State This pull-down menu allows you to enable or disable Port Security (locked MAC address table for the selected
ports).
Max. Learning Addr. (0-64) The number of MAC addresses that will be in the MAC address forwarding table for the selected switch and
gr
oup of por
ts.
Mode This pull-do
wn menu allows you to select how the MAC address table locking will be implemented on the
Switch,for the selected group of ports.The options are:
Permanent The locked addresses will not age out after the aging timer expires.
DeleteOnTimeout The locked addresses will age out after the aging timer expires.
DeleteOnReset – The locked addresses will not age out until the Switch has been reset.
Click
Apply to implement changes made.
64
Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch
65


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