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Fat AP and Cloud AP V200R010C00 Command Reference

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stp tc-protection interval

stp tc-protection interval

Function

The stp tc-protection interval command sets the time for a device to process the maximum number of TC BPDUs.

The undo stp tc-protection interval command restores the default value.

By default, the time is the Hello timer length.

Format

stp tc-protection interval interval-value

undo stp tc-protection interval

Parameters

Parameter Description Value
interval-value Specifies the time for a device to process the maximum number of TC BPDUs. The value is an integer ranging from 1 to 600, in seconds.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On a Layer 2 network running a spanning tree protocol, a device deletes MAC address entries and ARP entries after receiving TC packets. Frequent entry deletion may cause high CPU usage.

After you have run the stp tc-protection command to enable TC protection, you can configure the time, which the device takes to handle a given number of TC packets and immediately refresh forwarding entries, by running the stp tc-protection interval command. Within the time specified by interval-value, the device handles a given number of TC packets. Excess TC packets are processed by the device at once after the timer (whose length is the configured time) expires. This mechanism ensures that the device does not frequently delete its MAC entries and ARP entries, and therefore does not have excessive CPU usage.

You can specify the maximum number of TC packets that the device processes can handle in the specified time by running the stp tc-protection threshold command.

Prerequisites

TC protection has been enabled by running the stp tc-protection command.

Example

# Configure the amount of time, which MSTP process takes to handle a given number of TC packets and immediately refreshes forwarding entries, to 10 seconds.
<Huawei> system-view
[Huawei] stp tc-protection interval 10
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Updated: 2019-11-21

Document ID: EDOC1100064352

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