Quick Steps For Configuring Mstis - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Quick Steps for Configuring MSTIs

Quick Steps for Configuring MSTIs
By default, the Spanning Tree software is active on all switches and operating in the 1x1 mode using
802.1w RSTP. A loop-free network topology is automatically calculated based on default 802.1w RSTP
switch, bridge, and port parameter values.
Using Multiple Spanning Tree (MST) requires configuration changes to the default Spanning Tree values
(mode and protocol) as well as defining specific MSTP parameters and instances.
The following steps provide a tutorial for setting up a sample MSTP configuration, as shown in the
diagram below:
CIST-0
MSTI-1
1
Change the Spanning Tree operating mode, if necessary, on Switch A and Switch B from 1x1 to flat
mode using the bridge mode
-> bridge mode flat
Note that defining an MSTP configuration requires the use of explicit Spanning Tree commands, which
are available in both the flat and 1x1 mode. As a result, this step is optional. See
Configuration Commands" on page 12-10
2
Change the Spanning Tree protocol to MSTP using the
-> bridge protocol mstp
3
Create VLANs 100, 200, 300, and 400 using the
-> vlan 100
-> vlan 150
-> vlan 200
-> vlan 250
4
Assign switch ports to VLANs, as shown in the above diagram, using the
For example, the following commands assign ports 3/1, 4/2, 4/8, and 2/12 to VLANs 100, 150, 200, and
250 on Switch A:
-> vlan 100 port default 3/1
-> vlan 150 port default 4/2
-> vlan 200 port default 4/8
-> vlan 250 port default 2/12
page 12-16
3/1
VLAN 100
4/2
VLAN 150
4/8
VLAN 200
2/12
VLAN 250
Switch A
Flat Mode MSTP Quick Steps Example
command. For example:
for more information.
OmniSwitch AOS Release 6 Network Configuration Guide
Using 802.1Q 2005 Multiple Spanning Tree
2/1
VLAN 100
5/1
||
VLAN 150
5/2
||
VLAN 200
3/6
||
VLAN 250
Switch B
bridge protocol
vlan command. For example:
CIST-0
MSTI-1
"Using Spanning Tree
command. For example:
vlan port default command.
September 2009