HP 5120 EI Series User Manual

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Spanning tree configuration task list
Before configuring a spanning tree, you must determine the spanning tree protocol to be used (STP, RSTP,
PVST, or MSTP) and plan the device roles (the root bridge or leaf node).
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, be 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:
RRPP, Smart Link, and BPDU tunneling for STP.
• The spanning tree configurations made in system view take effect globally. Configurations made in
Layer 2 Ethernet interface view take effect on the current 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/send MSTP
packets
Optional
Enabling outputting port state transition information Optional
Enabling the spanning tree feature Required

HP 5120 EI Series Specifications

General

Brand	HP
Model	5120 EI Series
Category	Switch
Language	English