Spanning Tree Protocol (Stp); Configuring Stp - Allied Telesis x600-24Ts Software Reference Manual

Spanning Tree Protocol (STP)

STP uses the process described in
STP port states In STP mode, each switch port can be in one of five spanning tree states, and one of two switch
states. The state of a switch port is taken into account by STP. The STP port states
affect the behavior of ports whose switch state is enabled.
Table 18-2:
State
DISABLED
BLOCKING
LISTENING
LEARNING
FORWARDING

Configuring STP

By default, RSTP is enabled on all switch ports. This section provides a procedure for

configuring STP

To configure other modes, see
page
Table 18-3: Configuration procedure for STP
Command
RSTP is enabled by default with default settings on all switch ports to prevent layer 2 loops in your network.
configure terminal
awplus#
spanning-tree mode
awplus(config)#
awplus(config)# spanning-tree {stp|rstp|mstp} enable
spanning-tree priority <priority>
awplus(config)#
C613-50006-01 REV B
STP port states
Meaning
STP operations are disabled on the port. The port does not participate in
the operation of the Spanning Tree Algorithm and Protocol. The port can
still switch if its switch state is enabled.
The forwarding process discards received frames and does not submit
forwarded frames for transmission. This is the "standby" mode.The port
does not participate in frame relay.
The port is enabled for receiving frames only. The port is preparing to
participate in frame relay. The forwarding process discards received
frames and does not submit forwarded frames for transmission.
The port is enabled for receiving frames only, and the Learning Process
can add new source address information to the Forwarding Database.
The normal state for a switch port. The forwarding process and the
Spanning Tree entity are enabled for transmit and receive operations on
the port.
(Table 18-3).
"Configuring RSTP" on page 18.8
18.18.
stp
Software Reference for x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1
Spanning Tree Introduction: STP, RSTP, and MSTP
Table 18-1 to avoid loops.
Description
Enter Configuration mode.
By default, the device is in RSTP mode. Change to
STP mode.
By default, spanning tree is enabled on all switch
ports. If it has been disabled, enable it for STP.
By default, all devices have the same root bridge
priority, 32768 (8000 in hexadecimal), so the
device with the lowest MAC address becomes the
root bridge. If you want the device to be the root
bridge, set the root bridge priority to a value
lower than 32768. (If you enter a number that is
not a multiple of 4096, the switch rounds the
number down.)
(Table 18-2)
or "Configuring MSTP" on
18.5