3com DUA 1648-5AAA02 Manual Do Utilizador

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Speed Duplex — Shows the current speed and duplex mode. 
(Auto or fixed choice)
In the Advanced Port Configuration page you can set the 
Switch’s broadcast storm control and threshold limits.
Figure 11   Advanced Port Configuration Screen
Broadcast Storm Control — Shows if broadcast storm control 
is enabled or disabled.
Packet Rate Threshold — Shows the broadcast storm 
threshold. (500 - 15000 packets per second)
VLANs
The Switch uses VLANs to organise any group of ports into 
separate broadcast domains. VLANs confine broadcast traffic to 
the originating group and can eliminate broadcast storms in large 
networks. This also provides a more secure and cleaner network 
environment.
You can create up to 256 VLANs, and either add specified ports 
to a chosen VLAN so that the port can only communicate with 
other ports on the VLAN, or specify that a port can belong to all 
VLANs.
Communication between different VLANs can only take place if 
they are all connected to a router or Layer 3 Switch.