H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 208)

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To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Enable the digest snooping feature stp config-digest-snooping
Required
The digest snooping feature is
disabled on a port by default.
Return to system view quit —
Enable the digest snooping feature
globally
stp config-digest-snooping
Required
The digest snooping feature is
disabled globally by default.
Display the current configuration display current-configuration
You can execute this command in
any view.
z
When the digest snooping feature is enabled on a port, the port state turns to the discarding state.
That is, the port will not send BPDU packets. The port is not involved in the STP calculation until it
receives BPDU packets from the peer port.
z
The digest snooping feature is needed only when your device is connected to a device of another
vendor adopting proprietary spanning tree protocols.
z
To enable the digest snooping feature successfully, you must first enable it on all the ports of your
device that are connected to a device of another vendor adopting proprietary spanning tree
protocols and then enable it globally.
z
To enable the digest snooping feature, the interconnected devices and the devices of another
vendor adopting proprietary spanning tree protocols must be configured with exactly the same
MST region-related configurations (including region name, revision level, and VLAN-to-MSTI
mapping).
z
The digest snooping feature must be enabled on all the device ports that connect to the devices of
other vendors adopting proprietary spanning tree protocols in the same MST region.
z
When the digest snooping feature is enabled globally, the VLAN-to-MSTI mapping table cannot be
modified.
z
The digest snooping feature is not applicable to boundary ports in an MST region.
z
The digest snooping feature is not applicable to edge ports in an MST region.
Configuring Rapid Transition
Introduction
Designated ports of RSTP-enabled or MSTP-enabled devices use the following two types of packets to
implement rapid transition:
z
Proposal packets: Packets sent by designated ports to request rapid transition