Spanning Tree Introduction: STP, RSTP, MSTP
©2008 Allied Telesis Inc. All rights reserved.
18.20
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
Software Version 5.2.1
Assign root bridge priorities
MSTP lets you distribute traffic more efficiently across a network by blocking different links for different VLANs. You
do this by making different devices into the root bridge for each MSTP instance, and for the CIST, so that each
instance blocks a different link. 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 for
an instance or for the CIST, set the priority to a lower value (a higher priority) than other devices for this instance. (If
you enter a number that is not a multiple of 4096, the device rounds the number down.)
awplus(config-if)#
spanning-tree mst configuration
Enter MST Configuration mode.
awplus(config-mst)#
instance <msti-id> priority
<priority>
Set the priority for the device to become the root
bridge for each instance.
awplus(config-mst)#
exit
Return to Global Configuration mode.
awplus(config)#
spanning-tree priority <priority>
Set the priority for the device to become the root
bridge for the CIST.
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-if)#
interface
<port-list>
Enter Interface Configuration mode for these
switch ports.
awplus(config-if)#
awplus(config-if)#
spanning-tree edgeport
or
spanning-tree autoedge
Set these ports to be edge ports,
or
to automatically detect whether they are edge
ports.
Configure Root Guard
awplus(config-if)#
spanning-tree guard root
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.
awplus(config-if)#
exit
Return to Global Configuration mode.
Configure BPDU Guard
awplus(config)#
spanning-tree portfast bpdu-guard
If required, enable the BPDU Guard feature, and
configure timeout parameters.
awplus(config)#
spanning-tree errdisable-timeout
enable
awplus(config)#
spanning-tree errdisable-timeout
interval <10-1000000>
Check MSTP configuration
awplus(config)#
exit
Return to Privileged Exec mode.
awplus#
show spanning-tree mst config
Check that the digest is the same on this device as
for all other devices in the same region.
awplus#
show spanning-tree mst
Check the MST to VLAN and port mapping.
awplus#
show spanning-tree mst instance
<msti-id>
Check the detailed information for a particular
instance, and all switch ports associated with that
instance.
awplus#
show spanning-tree [interface
<port-list>]
Check general information about MSTP, and the
CIST settings.
Command
Description
Содержание AlliedWare Plus 5.2.1
Страница 8: ...65 Stacking Commands Introduction 65 2 Appendix l Command List ...
Страница 10: ......
Страница 218: ......
Страница 376: ......
Страница 726: ......
Страница 806: ......
Страница 1006: ......
Страница 1056: ......
Страница 1235: ...Stacking Reference This part includes the following chapters Chapter 64 Stacking Introduction Chapter 65 Stacking Commands ...
Страница 1236: ......