3Com 10014298 manual Configuring the Port Connection with Point-to-Point Link

Configuring MSTP 201

Configuring the Port

Connection with the

Point-to-Point Link

The point-to-point link directly connects two switches.

You can configure the port to connect or not connect with the point-to-point link in the following ways.

Configuring in System View

Perform the following configuration in system view.

Table 208 Configure the Port Connection With the Point-to-point Link

Operation	Command
Configure the port to connect with the	stp interface interface-list
point-to-point link.	point-to-point force-true
Configure the port not to connect with the	stp interface interface-list
point-to-point link.	point-to-point force-false
Configure MSTP to automatically detect if the	stp interface interface-list
port is directly connected with the	point-to-point auto
point-to-point link.
Configure MSTP to automatically detect if the	undo stp interface interface-list
port is directly connected with the	point-to-point
point-to-point link, as defaulted.

Configuring in Ethernet Port View

Perform the following configuration in Ethernet port view.

Table 209 Configure the Port Connection With the Point-to-point Link

Operation	Command
Configure the port to connect with the	stp point-to-point force-true
point-to-point link.
Configure the port not to connect with the	stp point-to-point force-false
point-to-point link.
Configure MSTP to automatically detect if the	stp point-to-point auto
port is directly connected with the
point-to-point link.
Configure MSTP to automatically detect if the	undo stp point-to-point
port is directly connected with the
point-to-point link, as defaulted.

For more about the commands, see the Switch 7750 Command Reference Guide.

The ports connected with the point-to-point link, upon some port role conditions being met, can transit to forwarding state rapidly through transmitting synchronization packet, thus reducing the unnecessary forwarding delay. If the parameter is configured in auto mode, MSTP will automatically detect if the current Ethernet port is connected with the point-to-point link.

For a link aggregation, only the master port can be configured to connect with the point-to-point link. If a port in auto-negotiation mode operates in full-duplex mode upon negotiation, it can be configured to connect with the point-to-point link.

This configuration takes effect on the CIST and all the MSTIs. The settings of a port determine whether or not the point-to-point link will be applied to all the STIs to which the port belongs. Note that a temporary loop may be redistributed if you