Switch 7700 Configuration Guide

Implementing STP on the Switch 7700 171
tree. If all the Ethernet ports of the bridge adopt the same priority parameter
value, then the priority of these ports depends on the Ethernet port index number.
Note that changing the priority of an Ethernet port causes recalculation of the
spanning tree. You can set the port priority at the time you set up networking
requirements.
By default, priorities of all the Ethernet ports are 128.
Configuring a Port to be Connected to Point-to-Point Link
Generally, a point-to-point link connects the switches.
Perform the following configurations in Ethernet port view.
The two ports connected by the point-to-point link can enter the forwarding state
rapidly by transmitting synchronous packets, so that the unnecessary forwarding
delay can be reduced. If this parameter is configured to be auto mode, RSTP can
automatically detect if the current Ethernet port is connected to a point-to-point
link. Note that, for an aggregated port, only the master port can be configured to
connect with the point-to-point link. After auto-negotiation, the port working in
full duplex can also be configured to connect with such link.
You can manually configure the active Ethernet port to connect with the
point-to-point link. However, if the link is not a point-to-point link, the command
may cause a system problem, and therefore setting auto mode is recommended.
By default, this parameter is configured in auto mode.
Setting mCheck of the Specified Port
Suppose there are some switches running STP and some other switches running
RSTP on a switching network. RSTP is STP-compatible. In a relatively stable
network, though the bridge running STP has been removed, the port of the switch
running RSTP is still working in STP-compatible mode. You can use the stp
mcheck command to manually command the port to work in RSTP mode. This
command can only be issued if the bridge runs RSTP in RSTP mode and has no
effect in the STP-compatible mode.
Tabl e 14 Configure a Specified Port to be Connected to a Point-to-Point Link
Operation Command
Configure a specified port to
be connected to a
point-to-point link
stp point-to-point force-true
Configure a specified port not
to be connected to a
point-to-point link
stp point-to-point force-false
Configure RSTP to
automatically detect if the port
is connected to a
point-to-point link.
stp point-to-point auto
Configure the port to be
automatically detected if it is
connected to a point-to-point
link, as defaulted.
undo stp point-to-point