Quick Reference Guide

150 | Spanning Tree
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MSTP CLI Management
SFTOS supports Multiple Spanning Tree Protocol (MSTP) by default. The basic STP commands (see
Basic STP (802.1D) CLI Management on page 146) applicable to MSTP. In addition to display commands
(see Display Spanning Tree Configuration on page 157), SFTOS provides the following commands
specific to MSTP:
Spanning Tree Configuration Tasks
1. Determine if Spanning Tree Protocol (STP) is enabled globally and on ports. See Figure 10-116 on
page 158 and Figure 10-118 on page 159.
2. Select an STP operational mode. See Setting the STP Version Parameter on page 151.
3. Start STP: Enable STP globally each on participating switch and enable STP on ports. See Enabling
STP on page 152.
Command Syntax Command Mode Purpose
[no]
spanning-tree msti instance
mstid
Global Config
Add an MSTP instance to the switch.
The instance mstid is a number corresponding to the new
instance ID to be added.
Range: mstid range of 0 to 63. The maximum number of
MSTP instances supported by SFTOS is 4.
[no] spanning-tree msti vlan msti
vlanid
Global Config Add an association between an MSTP instance and a VLAN.
The VLAN will no longer be associated with the common and
internal spanning tree.
The msti is a number that corresponds to the desired existing
multiple spanning tree instance. The vlanid is an existing
VLAN ID.
spanning-tree msti priority mstid
0–61440
Global Config Set the bridge priority for a specific MSTP instance.
The instance mstid is a number corresponding to the new
instance ID to be added.
0–61440 is the priority value.
Range: mstid range of 0 to 63. The priority value is in a range
of 0 to 61440, in increments of 4096.
Default: priority = S32768
spanning-tree
bpdumigrationcheck
{unit/slot/
port
| all}
Global Config Force a transmission of rapid spanning tree (RSTP) and
multiple spanning tree (MSTP) BPDUs. Use the unit/slot/port
parameter to transmit a BPDU from a specified interface, or
use the all keyword to transmit BPDUs from all interfaces.
This command forces the BPDU transmission when you
execute it, so the command does not change the system
configuration or have a no version.
Use the show interface ethernet unit/slot/port command to
display BPDU counters. See Figure 10-126 on page 163.