H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 86)

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NOTE:
•
The stp point-to-point force-false or stp point-to-point force-true command configured on a port in
MSTP mode is effective for 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 may bring a temporary loop.
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 sends based on the recognized format.
You can configure the MSTP packet format on a port. When operating in MSTP mode after the
configuration, the port sends and receives only MSTP packets of the format you have configured to
communicate with devices that send packets of the same format.
To configure the MSTP packet format to be supported on 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:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
Use either command.
3. Configure the mode the port uses to
recognize/send MSTP packets. stp compliance { auto | dot1s |
legacy }
auto by default.
NOTE:
•
MSTP provides the MSTP packet format incompatibility guard function. In MSTP mode, if a port is
configured to recognize/send MSTP packets in a mode other than auto, and receives a packet in a
format different from the specified type, the port becomes a designated port and remains in discarding
state to prevent the occurrence of a loop.
• MSTP provides the MSTP packet format frequent change guard function. If a port receives MSTP packets
of different formats frequently, the MSTP packet format configuration contains errors. If the port is
operating in MSTP mode, it is shut down for protection. The closed ports can be reactivated after a
detection interval. For more information about the detection interval, see
Fundamentals Configuration
Guide.