GS700TS Smart Switch Software Administration Manual
Managing Security 6-15
v1.0, June 2009
3. Select the Port Control state, Guest VLAN mode and Periodic Reauthentication sta tu s in
the provided fields in the first row.
4. If you selected Enable as the Periodic Reauthentication status, enter the Reauthentication
Period in the provided field in the first row.
5. Enter the Quiet Period, Resending EAP time, Max EAP Requests, Supplicant Timeout
and Server Timeout in the provided field in the first row.
6. Click APPLY to update the device.
Traffic Control
The Traffic Control menu contains the following options:
•“Storm Control”
•“Port Security”
•“Protected Ports”
Storm Control
Storm Contr ol limits the amount of Multicast and Broadcast frames accepted and forwarded by the
device. When Layer 2 frames are forwarded, Broadcast, and Multicast frames are flooded to all
ports on the relevant VLAN. This occupies bandwidth and loads all nodes on all ports.
A Broadcast Storm is a result of an excessive amount of broadcast messages simultaneously
transmitted across a network by a single port. Forwarded message responses are heaped onto the
network, straining network resources or causing the network to time out.
Storm control can be enabled per port by defining the packet type and the rate the packets are
transmitted. The system measures the incoming Broadcast and Multicast frame rates separately on
each port, and discards the frames when the rate exceeds a user-defined rate. By default, Storm
Control is enabled on all ports for Broadcast packets with a threshold of 200 kbps.
The Storm Control screen provides fields for configuring broadcast storm control.
To configure Storm Control:
1. Click Security > Traffic Control > Storm Control. The Storm Control screen displays: