Checking The Configuration - Huawei AR530 series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
network flapping. Therefore, to ensure rapid and stable spanning tree calculation, perform basic
configurations on the switching device and its ports and enable MSTP.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
stp enable
MSTP is enabled on the switching device.
By default, the MSTP function is enabled on the device.
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Follow-up Procedure
When the topology of a spanning tree changes, the forwarding paths to associated VLANs are
changed. The ARP entries corresponding to those VLANs on the switching device need to be
updated. MSTP processes ARP entries in either fast or normal mode.
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You can run the stp converge { fast | normal } command in the system view to configure the
STP/RSTP convergence mode.
By default, the normal MSTP convergence mode is used.

7.6.1.8 Checking the Configuration

Procedure
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Issue 01 (2014-11-30)
In fast mode, ARP entries to be updated are directly deleted.
In normal mode, ARP entries to be updated are rapidly aged.
The remaining lifetime of ARP entries to be updated is set to 0. The switching device rapidly
processes these aged entries. If the number of ARP aging probe attempts is not set to 0,
ARP implements aging probe for these ARP entries.
NOTE
The normal mode is recommended. If the fast mode is adopted, ARP entries will be frequently deleted,
causing the CPU usage on device to reach 100%. As a result, network flapping will frequently occur.
Run the display stp [ instance instance-id ] [ interface interface-type interface-number ]
[ brief ] command to view spanning-tree status and statistics.
Run the display stp region-configuration command to view configurations of activated
MST regions.
Run the display stp region-configuration digest command to view the digest
configurations of activated MST regions.
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