3com 2848-sfp plus Guia Do Utilizador

Use the Advanced Port Configuration tab to set the 
Switch’s broadcast storm control and threshold limits.

A broadcast storm is an incorrect packet sent out on a 
network that causes most hosts to respond all at once, 
typically with wrong answers that start the process over 
again. Broadcast storms use substantial network 
bandwidth and may cause network time-outs. 

Advanced settings include:

■

Broadcast Storm Control – Enables and disables 
broadcast storm control

■

Packet Rate Threshold – Sets the broadcast storm 
threshold (64 to 95232000 bytes per packet)

Figure 12   Advanced Port Configuration Screen

If you do not configure the Switch’s port settings, the 
ports will use the following default settings:

■

All ports are enabled

■

Autonegotiation is enabled

■

Flow control is enabled

■

Priority is disabled

A virtual LAN (VLAN) is a collection of network nodes 
that share the same collision domain, regardless of their 
physical location or connection point in the network. A 
VLAN serves as a logical workgroup with no physical 
barriers, and allows users to share information and 
resources as though located on the same LAN.

You can use the Switch to create VLANs to organize any 
group of ports into separate broadcast domains. VLANs 
confine broadcast traffic to the originating group and 
help eliminate broadcast storms in large networks. This 
also provides for a more secure and cleaner network 
environment.

Using the Switch, you can create up to 64 VLANs, add 
specific ports to a chosen VLAN (so that the port can 
only communicate with other ports on the VLAN), or 
configure a port make it a member of all VLANs.