H3C Technologies H3C SecPath F1000-E - Manual (Page 212)

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Item Description
Hello Time
Hello time is the interval at which the
device sends hello packets to the
surrounding devices to ensure that the
paths are fault-free.
An appropriate hello time setting
enables the device to timely detect link
failures on the network without using
excessive network resources. If the
hello time is set too long, the device
will take packet loss as a link failure
and trigger a new spanning tree
calculation process; if the hello time is
set too short, the device will send
repeated configuration BPDUs
frequently, which adds to the device
burden and causes waste of network
resources. H3C recommends that you
use the default setting.
Max Age
Max age determines how long a
configuration BPDU can be held by the
device.
If the max age time setting is too small,
the network devices will frequently
launch spanning tree calculations and
may take network congestion as a link
failure; if the max age setting is too
large, the network may fail to timely
detect link failures and fail to timely
launch spanning tree calculations, thus
reducing the auto-sensing capability of
the network. H3C recommends that
you use the default setting.
diameter and timers.
Instance ID ID of the MSTI to be configured
Root Type
Role of the device in the MSTI:
• Not Set: not set
• Primary: Configure the device as the root bridge.
• Secondary: Configure the device as a secondary root bridge.
After specifying the current device as the primary root bridge or a
secondary root bridge, you cannot change the priority of the device.
Instance
Bridge Priority
The bridge priority of a device is one of the factors determining whether
the device can be elected as the root bridge.