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Intel® Gigabit Ethernet Switch AXXSW1GB User Guide 11
3 Configuring Device Security
This section provides access to security pages that contain fields for setting security
parameters for ports and device management methods. This section contains the following
topics:
• Configuring Traffic Control
• Defining Access Control Lists
Configuring Traffic Control
This section contains information for managing both port security and storm control, and
includes the following topics:
• Enabling Storm Control
• Managing Port Security
Enabling Storm Control
Storm control limits the amount of Broadcast, Multicast and Unknown Unicast frames
accepted and forwarded by the device. When Layer 2 frames are forwarded, Broadcast,
Multicast and Unknown Unicast frames are flooded to all ports on the relevant VLAN.
This occupies bandwidth, and loads all nodes on all ports.
A Packet Storm is a result of an excessive amount of either Broadcast or Multicast or
Unknown Unicast 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 is enabled for all ports by defining the packet type and the rate the packets
are transmitted. The system measures the incoming Broadcast, Multicast or Unknown
Unicast frame rates separately on each port, and discards the frames when the rate exceeds
a user-defined rate.
The Storm Control Page provides fields for configuring packet storm control.