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1-15 Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1
Chapter 1
Flood Pruning Using VLANs
VLANs provide network managers with two significant capabilities:
■ The ability to segment traffic in a flat switched network. This
helps prevent traffic from being forwarded to stations where
it is not needed.
■ The ability to ignore physical switch locations when creating
workgroups. VLANs are logical constructions and can
traverse physical switch boundaries.
The hardware on all multiservice switches support port-based
VLANs with the following characteristics:
■ Frames classified as Layer 1 (Port-based) when they enter the
switch
■ Explicitly tagged VLAN packets — these are forwarded based
on the information in the packet.
■ Up to 1,000 VLANs — VLANs define a set of ports in a
flooding domain. Packets that need to be flooded are sent
only to ports participating in that VLAN (Figure 1-3).
Figure 1-3. Flooding Domain
Virtual Bridging
Function
Frame Classification
Function
Port
Registration
Function
Policies