Allied Telesis AT-9724TS Port Security, Admin State, Max. Learning Addr, Mode, Group of ports

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 Group pull down menu. Finally, enable or disable the Broadcast Storm, Multicast Storm and Destination Unknown using 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 Table in 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 State pull-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 following parameters can be set:
	Parameter	Description
	Unit	Choose the Switch ID number of the Switch in the switch stack to be modified.
	From/To	A consecutive group of ports may be configured starting 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
	Max. Learning Addr. (0-64)	ports).
		The number of MAC addresses that will be in the MAC address forwarding table for the selected switch and
	Mode	group of ports.
		This pull-down 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