Nortel BayStack 380, Using Manual, Page: 55 / 218

Chapter 2 Network configuration 55
Using the BayStack 380 10/100/1000 Switch
IEEE 802.1Q VLAN workgroups
BayStack 380 switches support up to 64 port-based VLANs with IEEE 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 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 10 ). 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 380 Switch allows you to assign ports to VLANs using the console,
Telnet, Web-based management, or an appropriate SNMP-based application. 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 10 Port-based VLAN example
BayStack
380
VLAN 1 VLAN 2
10004EB