The default Max Age timer of a switching device is 2000 centiseconds.
NOTE
The values of the Hello timer, Forward Delay timer, and Max Age timer must comply with the following
formulas; otherwise, network flapping occurs.
l 2 x (Forward Delay - 1.0 second) >= Max Age
l Max Age >= 2 x (Hello Time + 1.0 second)
----End
7.4.3 Configuring Port Parameters
Port parameters that may affect RSTP topology convergence include the link type and maximum
number of sent BPDUs. Proper port parameter settings help implement rapid topology
convergence.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The view of the Ethernet interface participating in STP calculation is displayed.
Step 3 (Optional) Run:
stp point-to-point { auto | force-false | force-true }
The link type is configured for the interface.
By default, an interface automatically determines whether to connect to a P2P link. The P2P link
supports rapid network convergence.
l If the Ethernet port works in full-duplex mode, the port is connected to a P2P link. In this
case, force-true can be configured to implement rapid network convergence.
l If the Ethernet port works in half-duplex mode, you can run stp point-to-point force-true
to forcibly set the link type to P2P.
Step 4 Run:
stp mcheck
MCheck is enabled.
On a port of switching device running RSTP is connected to a device running STP, the port
automatically transitions to the STP interoperable mode.
Enabling MCheck on the port is required because the port may fail to automatically transition
to the RSTP mode in the following situations:
l The switching device running STP is shut down or moved.
l The switching device running STP transitions to the RSTP mode.
Huawei AR3200 Series Enterprise Routers
Configuration Guide - LAN 7 STP/RSTP Configuration
Issue 02 (2012-03-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
199
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