HP VPN Firewall Appliances Network Management Configuration Guide

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To configure the priority of a device in a specified MSTI:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the priority of
the current device.
• In STP/RSTP mode:
stp priority priority
• In MSTP mode:
stp [ instance instance-id ]
priority priority
Use one of the commands.
The default setting is 32768.
For information about the value range for
the instance-id argument, see Network
Management Command Reference.
Configuring the maximum hops of an MST region
By setting the maximum hops of an MST region, you can restrict the region size. The maximum hops
configured on the regional root bridge will be used as the maximum hops of the MST region.
Configuration BPDUs sent by the regional root bridge always have a hop count set to the maximum value.
When a device receives this configuration BPDU, it decrements the hop count by 1 and uses the new hop
count in BPDUs that it propagates. When the hop count of a BPDU reaches 0, it is discarded by the
device that received it. This prevents devices beyond the reach of the maximum hop from participating in
spanning tree calculation, so the size of the MST region is limited.
Make this configuration on the root bridge only. All other devices in the MST region use the maximum
hop value set for the root bridge.
To configure the maximum number of hops of an MST region:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the maximum hops
of the MST region.
stp max-hops hops The default setting is 20.
Configuring the network diameter of a switched network
Any two terminal devices in a switched network are connected through a specific path composed of a
series of devices. The network diameter is the number of devices on the path composed of the most
devices. The network diameter is a parameter that indicates the network size. A bigger network diameter
indicates a larger network size. Based on the network diameter you configured, the system automatically
sets an optimal hello time, forward delay, and max age for the device.
To configure the network diameter of a switched network:
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Configure the network diameter of the
switched network.
stp bridge-diameter diameter The default setting is 7.
In STP, RSTP, or MSTP mode, each MST region is considered as a device and the configured network
diameter is effective only on the CIST (or MSTI 0), but not on other MSTIs.