H3C WA Series, Configuration Manual

Page: 52 / 76

7-26
By default, the packet format recognition mode of a port is
auto
, namely the port automatically
distinguishes the two MSTP packet formats, and determines the format of packets it will send based on
the recognized format. You can configure the MSTP packet format on a port. After the configuration,
when working in MSTP mode, the port sends and receives only MSTP packets of the format you have
configured to communicate with bridges that send packets of the same format.
Make this configuration on the root bridge and on the leaf nodes separately.
Follow these steps to configure the MSTP packet format to be supported on a port or a group of ports:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter Ethernet interface
view or WLAN Mesh
interface view
interface interface-type
interface-number
Enter
interface
view or port
group view
Enter port group view
port-group manual
port-group-name
Required
Use either command.
Configure the mode the port uses to
recognize/send MSTP packets
stp compliance
{
auto
|
dot1s
|
legacy
}
Required
auto
by default
z
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 will become a designated port and remain in the
discarding state to prevent the occurrence of a loop.
z
MSTP provides the MSTP packet format frequent change guard function. If a port receives MSTP
packets of different formats frequently, this means the MSTP packet format configuration contains
errors. In this case, if the port is working in MSTP mode, it will be disabled for protection. Those
ports closed thereby can be restored only by the network administrators.
Enabling MSTP
You must enable MSTP for the AP before any other MSTP-related configurations can take effect.
Make this configuration on the root bridge and on the leaf nodes separately.
Follow these steps to enable MSTP:
To do... Use the command... Remarks
Enter system view
system-view
—
Enable MSTP globally
stp enable
Required
By default, MSTP is disabled globally.
Enter Ethernet interface
view or WLAN Mesh
interface view
interface interface-type
interface-number
Enter
interface
view or
port group
view
Enter port group view
port-group manual
port-group-name
Required
Use either command.