SMC Networks 8150L2, Руководство по установке

Страница: 29 / 64

2-5
Application Examples
2
Making VLAN Connections
This switch support VLANs which can be used to organize any group of network
nodes into separate broadcast domains. VLANs confine broadcast traffic to the
originating group, and can eliminate broadcast storms in large networks. This
provides a more secure and cleaner network environment.
VLANs can be based on untagged port groups, or traffic can be explicitly tagged to
identify the VLAN group to which it belongs. Untagged VLANs can be used for small
networks attached to a single switch. However, tagged VLANs should be used for
larger networks, and all the VLANs assigned to the inter-switch links.
The switch also support multiple spanning trees which allow VLAN groups to
maintain a more stable path between all VLAN members. This can reduce the
overall amount of protocol traffic crossing the network, and provide a shorter
reconfiguration time if any link in the spanning tree fails.
Figure 2-4 Making VLAN Connections
Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use
untagged ports.
VLAN
aware
switch
R&D
Testing
VLAN 1
VLAN 2
Finance
Marketing
VLAN 3
Untagged Ports
VLAN
unaware
switch
Finance
VLAN 3
VLAN 4
Tagged Port
45 46 47 48
49
46
45
47
48
49
50
SMC8150L2
50
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 43 44 41 42 45 46 47 48