User's Manual

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In auto mode, if a port has not received BPDU in a certain time this port is viewed as the edge port.
35.2.9 Setting the Port Connection Type
If switches, on which RSTP is run, are in the point-to-point connection, these switches can establish a topology
rapidly through the handshake mechanism. When the port connection type is set, the connection of a port can
be set point-to-point.
By default, RSTP will judge whether a port is in the point-to-point connection according to the duplex mode of
this port. If this port works in full duplex mode, RSTP regards this port is in a point-to-point connection; if this
port works in half duplex mode, RSTP regards this port’s connection is shared.
If it is confirmed that RSTP or MSTP is running on the switches connected by a port, you should set this port’s
connection type to point-to-point so that fast handshake should be conducted.
In the port configuration mode, run the following command to set the connection type of a port.
Command Purpose
spanning-tree rstp point-to-point
[
force-true
|
force-false
|
auto
]
Sets the point to point interface.
force-true: Mandatorily sets the connection to
point-to-point.
force-false: Mandatorily sets the connection to
non-point-to-point.
auto: Automatically checks the port type.
35.2.10 Restarting the protocol conversion check
RSTP makes a switch to work together with a traditional 802.1D STP switch through a protocol transfer
mechanism. If one port of the switch receives the STP configuration message, the port then only transmits the
STP message.
After a port enters the STP-compatible state, even if this port does not receive 802.1D STP BPDU again, this
port will not resume the RSTP state. In this case, you can run spanning-tree rstp migration-check to enable
the protocol transfer checkup process and resume this port to the RSTP mode.
In global mode run the following command to restart RSTP transfer checkup:
Command Purpose
spanning-tree rstp migration-check
Restarts RSTP transfer checkup on all ports.
In switch port configuration mode, run the following command to conduct protocol transfer checkup on this port:
Command Purpose
spanning-tree rstp migration-check
Restarts RSTP transfer checkup on the current
port.