Item

 

Description

 

 

 

Displays the current state of the port.

 

 

 

z NORMAL: The user on the port passed the authentication.

 

Current Port State

 

z BLOCK: The port is in the initial state after the LDB feature is

 

 

enabled or the port is aged out.

 

 

 

 

 

 

z SLEEP: The number of the user’s authentication attempts

 

 

 

exceeded the preset maximum value.

 

User

Displays the user passing the authentication.

 

 

 

 

 

MAC

 

Displays the MAC address of the user passing the authentication.

 

 

 

 

Configuring Broadcast Storm Control

Broadcast Storm Control limits the amount of Multicast and Broadcast frames accepted and forwarded by the switch. 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.

Broadcast Storm is enabled for all Gigabit 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.

Packet threshold is ignored if Broadcast Storm Control is disabled.

This section contains the following topic:

z

z

Defining Broadcast Storm Control Viewing Broadcast Storm Control

Defining Broadcast Storm Control

The Broadcast Storm Setup Page allows network managers to define Broadcast Storm Traffic.

Click Device > Broadcast Storm > Setup. The Broadcast Storm Setup Page opens.

Figure 3-81Broadcast Storm Setup Page

The Broadcast Storm Setup Page contains the following fields:

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3Com 3CBLSF26H manual Configuring Broadcast Storm Control, Defining Broadcast Storm Control, Mac