Cisco ESW 500 User Manual

Configuring Device Security
Defining Traffic Control
ESW 500 Series Switches Administration Guide 127
5
• Defining Storm Control
• Defining Port Security
Defining Storm Control
Storm Control enables limiting 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 connected 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 is enabled per all ports 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.
NOTE Storm Control is enabled per port on GE devices, and per system on FE devices (not
applicable to ESW 520-8P devices).
The
Storm Control Page provides fields for configuring Broadcast Storm Control.
To define storm control:

Cisco ESW 500 Specifications

General

Brand	Cisco
Model	ESW 500
Category	Switch
Language	English