Mstp Packet Format Configuration - Huawei Quidway S3900 Series Operation Manual

Operation Manual – MSTP
Quidway S3900 Series Ethernet Switches-Release 1510
Caution:
Once you specify a switch as the root bridge or a secondary root bridge by using the
stp root primary or stp root secondary command, the bridge priority of the switch
is not configurable.
During the selection of the root bridge, if multiple switches have the same bridge
priority, the one with the least MAC address becomes the root bridge candidate.
II. Configuration example
# Set the bridge priority of the current switch to 4,096 in spanning tree instance 1.
<Quidway> system-view
[Quidway] stp instance 1 priority 4096

1.2.5 MSTP Packet Format Configuration

You can set the MSTP packet format to the following three formats for a port: auto,
legacy, and dot1s (802.1s).
With the MSTP packet format set to auto, the port automatically determines the
format of the packets to be transmitted according to that of the received MSTP
packets. If the format of the received packets changes repeatedly, MSTP will shut
down the corresponding port to prevent network storm. A port shut down in this
way can only be enabled again by the network administrator.
With the MSTP packet format set to legacy, the port only processes and transmits
MSTP packets in legacy format. If packets in dot1s format are received, the
corresponding ports are set as discarding ports to prevent network storm.
With the MSTP packet format set to dot1s, the port only processes and transmits
MSTP packets in dot1s format. If packets in legacy format are received, the
corresponding ports are set as discarding ports to prevent network storm.
All the ports in an aggregation group use the same MSTP packet format.
I. Configuration Procedure
Huawei Technologies Proprietary
1-13
Chapter 1 MSTP Configuration