HP FlexNetwork NJ5000, Руководство пользователя

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Protocols and standards
MSTP is documented in the following protocols and standards:
•
IEEE 802.1d,
Spanning Tree Protocol
•
IEEE 802.1w,
Rapid Spanning Tree Protocol
•
IEEE 802.1s,
Multiple Spanning Tree Protocol
Configuration guidelines
When you configure MSTP, follow these guidelines:
•
Two or more spanning tree devices belong to the same MST region only if they are configured
to have the same MST region name, MST region level, and the same VLAN-to-instance
mapping entries in the MST region, and they are connected through a physical link.
•
If two or more devices are selected as the root bridge in a spanning tree at the same time, the
device with the lowest MAC address is chosen.
•
If BPDU guard is disabled, a port set as an edge port becomes a non-edge port again if it
receives a BPDU from another port. To restore its port role as an edge port, you must restart the
port.
•
If a port directly connects to a user terminal, configure it as an edge port and enable BPDU
guard for it. This enables the port to quickly transit to the forwarding state when ensuring
network security.
Recommended MSTP configuration procedure
Step Remarks
1.
Configuring an MST
region
.
Optional.
Configure the MST region-related parameters and VLAN-to-instance
mappings.
By default, the MST region-related parameters adopt the default values,
and all VLANs in an MST region are mapped to MSTI 0.
2.
Configuring MSTP
globally
.
Required.
Enable STP globally and configure MSTP parameters.
By default, STP is enabled globally. All MSTP parameters have default
values.
3.
Configuring MSTP on a
port
.
Optional.
Enable MSTP on a port and configure MSTP parameters.
By default, MSTP is enabled on a port, and all MSTP parameters adopt
the default values.
4.
Displaying MSTP
information of a port
.
Optional.
Display MSTP information of a port in MSTI 0, the MSTI to which the port
belongs, and the path cost and priority of the port.
Configuring an MST region
1.
From the navigation tree, select
Network
>
MSTP
.
By default, the
Region
tab is displayed.