User's Manual

Table Of Contents
238
Users Manual of CS-6306R
19.2.3.12 Configuring Port Connection Type
If the connection between MSTP-supported switches is the point-to-point direct connection, the switches can
rapidly establish connection through handshake mechanism. When you configure the port connection type,
set the port connection to the point-to-point type.
The protocol decides whether to use the point-to-point connection or not according to the duplex attribute. If
the port works in full-duplex mode, the protocol considers the connection is a point-to-point one. If the port
works in the half-duplex mode, the protocol considers the connection is a shared one.
If the switch that the port connects run the RSTP protocol or the MSTP protocol, you can set the port
connection type to point-to-point, ensuring that a handshake is rapidly established.
In port configuration mode, run the following command to set the port connection type.
Command Purpose
spanning-tree mstp point-to-point
force-true
Sets the port connection type to point-to-point.
spanning-tree mstp point-to-point
force-false
Sets the port connection type to shared.
spanning-tree mstp point-to-point auto Automatically checks the port connection type.
no spanning-tree mstp point-to-point Resumes the port connection type to the default
settings.
19.2.3.13 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 enable or disable the MST-compatible mode:
Command Purpose
spanning-tree mstp mst-compatible Enable the MST-compatible mode of the switch.
no spanning-tree mstp mst-compatible Disable the MST-compatible mode of the switch.