System information

Using the System Configuration Program
2-26
Configuring STA for Ports
The following figure and table describe port STA configuration.
Spanning Tree Port Configuration : Unit 1 Port 1 - 12
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Fast forwarding on all ports : [Enable] [Disable]
Port Type Priority Cost FastForwarding
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1 10/100TX 128 19 ENABLED
2 10/100TX 128 19 ENABLED
3 10/100TX 128 19 ENABLED
4 10/100TX 128 19 ENABLED
5 10/100TX 128 19 ENABLED
6 10/100TX 128 19 ENABLED
7 10/100TX 128 19 ENABLED
8 10/100TX 128 19 ENABLED
9 10/100TX 128 19 ENABLED
10 10/100TX 128 19 ENABLED
11 10/100TX 128 19 ENABLED
12 10/100TX 128 19 ENABLED
<APPLY> <OK> <CANCEL> <PREV UNIT> <NEXT UNIT> <PREV PAGE> <NEXT PAGE>
Use <TAB> or arrow keys to move. <Enter> to select
Parameter Default Description
Fast forwarding
on all ports
Enabled See “FastForwarding” in this table.
Type Shows port type as:
10/100TX: 10BASE-T / 100BASE-TX
100FX: 100BASE-FX
1000SX: 1000BASE-SX
1000LX: 1000BASE-LX
Priority 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.
Where more than one port is assigned the highest priority, the port with
lowest numeric identifier will be enabled. The range is 0 - 255.
(Path) Cost 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.
Fast Forwarding* Enabled This parameter is used to enable/disable the Fast Spanning Tree mode
for the selected port. In this mode, ports skip the Blocked, Listening and
Learning states and proceed straight to Forwarding.
*Fast Forwarding enables end-node workstations and servers to overcome time-out problems when the
Spanning Tree Algorithm is implemented in a network. Therefore, Fast Forwarding should only be enabled for
ports connected to an end-node device.