Configuring Rstp - Allied Telesis SwitchBlade x908 Series Software Reference Manual

Spanning Tree Introduction: STP, RSTP, and MSTP

Configuring RSTP

RSTP is enabled by default with default settings on all switch ports to prevent layer 2 loops in
your network. No further configuration is required if you want to use RSTP with these default
settings. For further RSTP configuration, see
To configure other modes, see
page
For detailed configuration examples, see the How To Note How To Configure Basic Switching
Functionality at http://www.alliedtelesis.com/resources/literature/howto_plus.aspx.
Table 18-5: Configuration procedure for RSTP
RSTP is enabled by default with default settings on all switch ports to prevent layer 2 loops in your network. No
further configuration is required if you want to use RSTP with these default settings. If you need to restore the device
to RSTP after it has been set to another mode, or modify the default RSTP settings, follow the procedure below.
awplus#
awplus(config)#
awplus(config)#
awplus(config)#
Configure edge ports
If some switch ports are connected to devices that cannot generate BPDUs (such as workstations), you can set
particular switch ports as edge ports, or set them to automatically detect whether they are edge ports.
awplus(config)#
awplus(config-if)#
awplus(config-if)#
Configure Root Guard
awplus(config-if)#
awplus(config)#
18.8
18.5.
Command
configure terminal
spanning-tree mode rstp
spanning-tree {stp|rstp|mstp} enable
spanning-tree priority <priority>
interface <port-list>
spanning-tree edgeport
or
spanning-tree autoedge
exit
spanning-tree guard root
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1
Table 18-5 below.
"Configuring MSTP" on page 18.18
Description
Enter Configuration mode.
By default, the device is in RSTP mode. If it has
been changed to STP or MSTP mode, change it
back to RSTP.
By default, RSTP is enabled on all switch ports. If it
has been disabled, enable it.
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.)
Enter Interface Configuration mode for these
switch ports.
Set these ports to be edge ports,
or
Set these ports to automatically detect whether
they are edge ports.
Return to Global Configuration mode.
The Root Guard feature makes sure that the port
on which it is enabled is a designated port. If the
Root Guard enabled port receives a superior
BPDU, it goes to a Listening state (for STP) or
discarding state (for RSTP and MSTP). Enable the
Guard Root feature if required.
or "Configuring STP" on
C613-50007-01 REV B