Configure The Mstp Running Mode - Huawei Quidway S3500 Series Operation Manual

Operation Manual - STP
Quidway S3500 Series Ethernet Switches
information, refer to the configuration tasks "Configure switching network diameter" and
"Configure the Hello Time of the switch".
Note:
You can configure the current switch as the root of several STIs, however, it is not
necessary to specify two or more roots for an STI. In other words, please do not
specify the root for an STI on two or more switches.
You can configure more than one secondary root for a spanning tree through
specifying the secondary STI root on two or more switches.
Generally, you are recommended to designate one primary root and more than one
secondary roots for a spanning tree.
By default, a switch is neither the primary root or the secondary root of the spanning
tree.

1.2.3 Configure the MSTP Running Mode

MSTP and RSTP are compatible and they can recognize the packets of each other.
However, STP cannot recognize MSTP packets. To implement the compatibility, MSTP
provides two operation modes, STP-compatible mode and MSTP mode. In
STP-compatible mode, the switch sends STP packets via every port and serves as a
region itself. In MSTP mode, the switch ports send MSTP or STP packets (when
connected to the STP switch) and the switch provides multiple spanning tree function.
You can use the following command to configure MSTP running mode. MSTP can
intercommunicate with STP. If there is STP switch in the switching network, you may
use the command to configure the current MSTP to run in STP-compatible mode,
otherwise, configure it to run in MSTP mode.
Perform the following configuration in system view.
Table 1-5 Configure the MSTP running mode
Configure MSTP to run in STP-compatible mode
Configure MSTP to run in RSTP mode
Configure MSTP to run in MSTP mode.
Restore the default MSTP running mode
Operation
Huawei Technologies Proprietary
1-13
Chapter 1 MSTP Region-configuration
Command
stp mode stp
stp mode rstp
stp mode mstp
undo stp mode