Setting The Spanning Tree Mode - H3C S3600V2 SERIES Layer 2-Lan Switching Configuration Manual

Task
Performing mCheck
Configuring Digest Snooping
Configuring No Agreement Check
Configuring TC snooping
Configuring protection functions

Setting the spanning tree mode

The spanning tree modes include:
• STP mode—All ports of the device send STP BPDUs. Select this mode when the peer device of a port
supports only STP.
RSTP mode—All ports of the device send RSTP BPDUs. A port in this mode automatically transits to
•
the STP mode when receiving STP BPDUs from the peer device, and a port in this mode does not
transit to the MSTP mode when receiving MSTP BPDUs from the peer device.
MSTP mode—All ports of the device send MSTP BPDUs. A port in this mode automatically transits
•
to the STP mode when receiving STP BPDUs from the peer device, and a port in this mode does not
transit to the RSTP mode when receiving RSTP BPDUs from the peer device.
• PVST mode—The device sends PVST BPDUs through all ports and maintains a spanning tree for
each VLAN. The number of VLANs that PVST can maintain instances for depends on the switch
model. Suppose the number is n, which is 128 on the S3600V2 Switch Series. When you configure
PVST on devices of different models in a network, to avoid network failures, make sure that the
number of VLANs for which PVST maintains instances does not exceed the lowest n. An H3C device
running PVST can communicate with third-party devices running PVST or Rapid PVST. When H3C
devices running PVST communicate with each other or an H3C device running PVST communicates
with a third-party device running Rapid PVST, the H3C devices supports rapid convergence like that
provided by RSTP.
The MSTP mode is compatible with the RSTP mode, and the RSTP mode is compatible with the STP mode.
The PVST mode's compatibility with the other spanning tree mode varies by port type:
On an access port, the PVST mode is compatible with any other spanning tree mode in any VLAN.
•
On a trunk or hybrid port, the PVST mode is compatible with any other spanning tree mode in only
•
VLAN 1.
To set the spanning tree mode:
Step
1. Enter system view.
Configuring path costs of ports
Configuring the port priority
Configuring the port link type
Configuring the mode a port uses to recognize/send MSTP packets
Enabling outputting port state transition information
Enabling the spanning tree feature
Command
system-view
78
Remarks
Optional
Optional
Optional
Optional
Optional
Required
Optional
Optional
Optional
Optional
Optional
Remarks
N/A