User's Manual

Table Of Contents
229
Users Manual of CS-6306R
19.2.2 MSTP Configuration Task List
Default MSTP configuration
Enabling and disabling MSTP
Configuring MSTP region
Configuring network root
Configuring secondary root
Configuring bridge priority
Configuring time parameters of STP
Configuring network diameter
Configuring maximum hop count
Configuring port priority
Configuring path cost for port
Configuring port connection type
Activating MST-compatible mode
19.2.2.1 Activating MST-Compatible Mode
The MSTP protocol that our switches support is based on IEEE 802.1s. In order to be compatible with other
MSTPs, especially MSTP that the Cisco switches support, the MSTP protocol can work in MST-compatible
mode. Switches running in MSTP-compatible mode can identify the message structure of other MSTPs,
check the contained MST regional identifier and establish the MST region.
The MST-compatible mode and the STP-compatible mode are based on MSTP protocol conversion
mechanism. If one port of the switch receives BPDU in compatible mode, the port automatically changes to
the mode and sends BPDU in compatible mode. To resume the port to standard MST mode, you can run
spanning-tree mstp migration-check.
In global configuration mode, run the following commands to activate or disable the MST-compatible mode:
Command Purpose
spanning-tree mstp mst-compatible Activates the MST-compatible mode for the switch.
no spanning-tree mstp mst-compatible Disables the MST-compatible mode for the switch.