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VER VI E W
February 2003 © 2003 Foundry Networks, Inc. 2-3
The management agent provides a wide range of advanced
performance-enhancing features. Port-based VLANs provide
traffic security and efficient use of network bandwidth. QoS
priority queueing ensures the minimum delay for
mo v in g
real-time multimedia data through the switch. Flow control
eliminates the loss of packets due to bottlenecks caused by port
saturation. Port security is provided to filter unwanted traffic
from the switch.
Some of the switch’s advanced features are described below. For
a detailed description, refer to the Foundry EdgeIron User Guide.
VLANs
This switch supports up to 255 VLANs. A Virtual LAN is a
collection of network nodes that share the same collision domain
regardless of their physical location or connection point in the
network. By segmenting your network into VLANs, you can:
• Eliminate broadcast storms which severely degrade
performance in a flat network.
• Simplify network management for node changes/moves by
remotely configuring VLAN membership for any port, rather
than having to manually change the node’s physical
connection.
• Provide data security by restricting all traffic to the
originating VLAN, except where a connection is explicitly
defined via the switch’s routing service.
This switch supports Private VLANs as an extension of the
common VLAN. Private VLANs can be used to provide
port-based security and isolation between ports within a VLAN.
Private VLANs deliver per port security, requiring only one
VLAN on every switch, not every port. This feature greatly