H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 78)

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Configuration restrictions and guidelines
• If GVRP and a spanning tree protocol are enabled on a device at the same time, GVRP packets are
forwarded along the CIST. To advertise a certain VLAN within the network through GVRP, make
sure that this VLAN is mapped to the CIST when you configure the VLAN-to-instance mapping table.
For more information about GVRP, see "Configuring GVRP."
• The spanning tree configurations are mutually exclusive with any of the following functions on a port:
service loopback, RRPP, Smart Link, and BPDU tunneling for STP.
• The spanning tree configurations made in system view take effect globally. Configurations made in
Ethernet interface view take effect on the interface only. Configurations made in port group view
take effect on all member ports in the port group. Configurations made in Layer 2 aggregate
interface view take effect only on the aggregate interface. Configurations made on an aggregation
member port can take effect only after the port is removed from the aggregation group.
• After you enable a spanning tree protocol on a Layer 2 aggregate interface, the system performs
spanning tree calculation on the Layer 2 aggregate interface but not on the aggregation member
ports. The spanning tree protocol enable state and forwarding state of each selected member port
is consistent with those of the corresponding Layer 2 aggregate interface.
• Though the member ports of an aggregation group do not participate in spanning tree calculation,
the ports still reserve their spanning tree configurations for participating in spanning tree
calculation after leaving the aggregation group.
STP configuration task list
Task Remarks
Configuring the root
bridge
Setting the spanning tree mode
Required.
Configure the device to
operate in STP mode.
Configuring the root bridge or a secondary root
bridge
Optional.
Configuring the device priority Optional.
Configuring the network diameter of a switched
network
Optional.
Configuring spanning tree timers Optional.
Configuring the timeout factor Optional.
Configuring the maximum port rate Optional.
Configuring the mode a port uses to recognize and
send MSTP packets
Optional.
Enabling outputting port state transition information Optional.
Enabling the spanning tree feature Required.
Configuring the leaf
nodes
Setting the spanning tree mode
Required.
Configure the device to
operate in STP mode.
Configuring the device priority Optional.