Nortel Networks 450 - Manual (Page 58)

Using the BayStack 450 10/100/1000 Series Switch
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IEEE 802.1Q VLAN Workgroups
BayStack 450 switches support up to 64 port-based VLANs with 802.1Q tagging
available per port. Ports are grouped into broadcast domains by assigning them to
the same VLAN. Frames received in one VLAN can only be forwarded within
that VLAN, and IP Multicast frames and unknown unicast frames are flooded
only to ports in the same VLAN.
Setting up virtual LANs (VLANs) is a way to segment networks to increase
network capacity and performance without changing the physical network
topology (
Figure 1-15 ). With network segmentation, each switch port connects to
a segment that is a single broadcast domain. When a switch port is configured to
be a member of a VLAN, it is added to a group of ports (workgroup) that belong
to one broadcast domain.
The BayStack 450 switch allows you to assign ports to VLANs using the console
or TELNET; VLAN assignment is not currently available through SNMP. You can
assign different ports (and therefore the devices attached to these ports) to
different broadcast domains. This feature allows network flexibility because you
can reassign VLANs to accommodate network moves, additions, and changes,
eliminating the need to change physical cabling.
Figure 1-15. Port-Based VLAN Example
BayStack 450-24T
switch
VLAN 1 VLAN 2
BS45009A
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