H3C Technologies H3C S12500 Series Switches - Manual (Page 96)

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Configuring the port link type
A point-to-point link directly connects two devices. If two root ports or designated ports are connected
over a point-to-point link, they can rapidly transit to the forwarding state after a proposal-agreement
handshake process.
Configuration restrictions and guidelines
• You can configure the link type as point-to-point for a Layer 2 aggregate interface or a port that
operates in full duplex mode. H3C recommends you to use the default setting and let the switch to
automatically detect the port link type.
• The stp point-to-point force-false or stp point-to-point force-true command configured on a port in
MSTP or PVST mode takes effect on all MSTIs or VLANs.
• If the physical link to which the port connects is not a point-to-point link but you set it to be one, the
configuration might bring a temporary loop.
Configuration procedure
To configure the link type of a port or a group of ports:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view or port group
view.
• Enter Ethernet interface view
or Layer 2 aggregate
interface view:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
Use either command.
3. Configure the port link type.
stp point-to-point { auto |
force-false | force-true }
By default, the link type is auto
where the port automatically
detects the link type.
Configuring the mode a port uses to
recognize/send MSTP packets
A port can receive/send MSTP packets in the following formats:
• dot1s—802.1s-compliant standard format
• legacy—Compatible format
By default, the packet format recognition mode of a port is auto. The port automatically distinguishes the
two MSTP packet formats, and determines the format of packets it will send based on the recognized
format.