Avaya P880 Switch User Manual


 
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Chapter 1
Cajun P550R/P880/P882 Switch User Guide
Load MIB
Spanning Tree Modes
Buffer and Queue Management
Virtual Bridging Functions
All three switches are designed to support:
Up to 24,000 MAC addresses in the switch address
forwarding table — allows the switch to store forwarding
information for hosts in very large networks.
Segmented address tables qualified by address and VLAN
membership — allows the same host to appear on different
VLANs on different ports.
Optional per-VLAN STP — isolates loop control to smaller
domains, so spanning trees converge faster after a topology
change. Otherwise, packets are forwarded to the port’s
default VLAN.
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 three 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 (Figure1-3).