Справочник Пользователя для 3com 2226 PLUS

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 S

WITCH

This page allows you to remove community 
strings.

Figure 23   SNMP Remove Screen

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.

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.

Communication between different VLANs can 
only take place if they are all connected to a 
router or layer 3 switch.

The Device menu includes five items:

■

VLAN

■

Spanning Tree

■

IGMP Snooping

■

IGMP Query

■

Broadcast Storm