Alcatel OmniStack 8008 User Manual page 37

Parameter
Fast forwarding mode of
all ports
Type
Priority
(Path) Cost
FastForwarding
Default Description
ENABLED Allows you to enable or disable fast forwarding for all
ports on the switch.
Shows the port type as 1000SX (1000Base-SX).
128 Defines the priority for the use of a port in the STA
algorithm. If the path cost for all ports on a switch are the
same, the port with the highest priority (i.e., lowest
value) will be configured as an active link in the spanning
tree. When more than one port is assigned the highest
priority, the port with lowest numeric identifier will be
enabled.
The range is 0 - 255.
100/19/4 This parameter is used by the STA algorithm to
determine the best path between devices. Therefore,
lower values should be assigned to ports attached to
faster media, and higher values assigned to ports with
slower media.
(Path cost takes precedence over port priority.)
The default and recommended range is:
Ethernet: 100 (50~600)
Fast Ethernet: 19 (10~60)
Gigabit Ethernet: 4 (3~10)
The full range is 0 - 65535.
ENABLED This parameter is used to enable/disable the Fast
Spanning Tree mode for the port. In this mode, ports
skip the Blocked, Listening and Learning states and
proceed straight to Forwarding.
FastForwarding enables end-node workstations and
servers to overcome time-out problems when the
Spanning Tree Algorithm is implemented in a network.
Therefore, FastForwarding should only be enabled for
ports that are connected to an end-node device.
Configuring the Switch
2-27