Allied Telesis AT-S10 TurboStack - Manual (Page 30)

Management Menus
20
Redundant Links
Configuration
The redundant link feature allows you to configure an alternate path to a
critical network resource; this resource can be the backbone or a server
running critical applications. You can have up to 6 pairs on a 12-port hub
and 12 pairs on a 24-port hub.
A redundant pair consists of a primary and a secondary port. After
configuration, the primary port is enabled and the secondary port,
disabled. When the primary port fails, the secondary port takes over until
the primary port’s error condition is resolved. See Figure 2 for topology
samples.
Do not confuse redundant links with the spanning tree algorithm.
Redundant links affect only the hub and its ports.
Figure 2: Redundant Link
Topologies
TurboStack hub 1
Port 13 (AUI)
(Primary port)
Enabled
Port 1
(Secondary port)
Disabled
Switch Switch
BACKBONE
TOPOLOGY B:
Port 1
(Primary port)
Enabled
Port 2
(Secondary port)
TurboStack hub 2
Server with two
network adapter cards
TOPOLOGY A:
Disabled