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
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
group of ports.
Mode
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