Filter
Top Products
Summary of Features 1-3
Full Duplex The Switch 9000 provides full-duplex support for all ports. Full-duplex
allows frames to be transmitted and received simultaneously and, in
effect, doubles the bandwidth available on a link. The Switch 9000 will
refuse a half duplex connection on any port.
Switch Operation The Switch 9000 uses the same algorithm as a conventional 802.1d
bridge for filtering, forwarding, and learning packets.
Virtual LANs (VLANs)
The Switch 9000 has a Virtual LAN (VLAN) feature that allows you to
build your network segments without being restricted by physical
connections. A VLAN is a group of location- and topology-independent
devices that communicate as if they are on the same physical Local
Area Network (LAN). Implementing VLANs on your network has the
following three advantages:
■ It eases the change and movement of devices on networks. If a
device in VLAN marketing is moved to a port in another part of the
network, all you must do is specify that the new port belongs to
VLAN marketing.
■ It helps to control broadcast traffic. If a device in VLAN marketing
transmits a broadcast frame, only VLAN marketing devices receive
the frame.
■ It provides extra security. Devices in VLAN marketing can only
communicate with devices on VLAN sales using a device that
provides routing services.
For more information on VLANs, refer to Chapter 5.
Priority Access Control Enabled (PACE)
The Switch recognizes the PACE bit set by 3Com Etherlink
®
adapters
and other devices supporting PACE. When enabled, traffic with these
bits receives priority service from the Switch.
Spanning Tree Protocol
(STP)
The Switch 9000 supports the IEEE 802.1d Spanning Tree Protocol (STP)
which is a bridge-based mechanism for providing fault tolerance on
networks. STP allows you to implement parallel paths for network
traffic, and ensure the following:
SW9000.BK Page 3 Wednesday, April 1, 1998 11:00 AM