Cabletron Systems 9E428-12 - Manual (Page 10)

9E428-12/36 and 9E429-12/36 Module Specific Information
8
Switch Configuration Screen Fields
The following information briefly explains each Switch Configuration Screen
field.
Type of STA (Toggle)
Allows you to set the method that switches use to decide which switch is the
controlling (Root) switch when two or more switches exist in parallel (Spanning
Tree Algorithm). Press the Space Bar to toggle to the desired value. Valid types
are:
• DEC
• IEEE
• NONE
Port #
Displays the number of the port for which configuration information is displayed.
MAC Address
Lists the hardware address of each listed switch interface.
State
Displays the current state of each listed interface. The possible interface states
include:
Disabling: Management has disabled this interface. No traffic can be received or
forwarded while the interface is disabled.
Learning: The switch is learning this interface’s network addresses. The switch
enters the learning state when the Transparent Database is created
(during start-up or after being deleted), or when the Spanning Tree
Algorithm detects a network topology change.
Listening: The switch is not adding information to the Transparent Database.
The switch is monitoring BPDU traffic while preparing to move from
the learning to the forwarding state.
Forwarding: The switch is on-line and this interface is forwarding traffic.
Blocking: This interface will not forward any traffic through the switch.
All switches in a network must use the same Spanning Tree protocol. The IEEE
protocol has a unique format for its Bridge Protocol Data Units (BPDU). Trying
to mix STA protocols results in an unstable network.
NOTE