tracert-livetime (PWE3 Trace test instance)

Function

The tracert-livetime command sets the lifetime of a PWE3 trace test instance.

The undo tracert-livetime command restores the default lifetime.

By default, the initial TTL of packets is 1, and the maximum TTL of packets is 30.

Format

tracert-livetime first-ttl first-ttl max-ttl max-ttl

undo tracert-livetime

Parameters

Parameter	Description	Value
first-ttl first-ttl	Specifies the initial TTL of packets.	The value is an integer ranging from 1 to 255.
max-ttl max-ttl	Specifies the maximum TTL of packets.	The value is an integer ranging from 1 to 255. max-ttl must be greater than or equal to first-ttl

Parameter

Description

Value

first-ttl first-ttl

Specifies the initial TTL of packets.

The value is an integer ranging from 1 to 255.

max-ttl max-ttl

Specifies the maximum TTL of packets.

The value is an integer ranging from 1 to 255. max-ttl must be greater than or equal to first-ttl

Views

NQA view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
sla	write

Usage Guidelines

Usage Scenario

To set the minimum and maximum lifetime of a test instance, run the tracert-livetime command. This prevents endless traveling of test packets in routing on the network.

Configuration Impact

When configuring first-ttl and max-ttl, ensure that max-ttl is not smaller than max-ttl; otherwise, the configuration fails.

Precautions

If parameters need to be changed during the running of the test instance, the system prompts you whether to terminate the test instance. Press "Y" or "N" as required.

If you press "Y", the test instance is terminated and parameters changed. The settings take effect after being committed. To restart the test instance, run the start command.
If you press "N", the test instance keeps running, and the parameters fail to be modified.

Example

# Set the lifetime of the test instance named user test, with the initial TTL 5 and the maximum TTL 20.

<HUAWEI> system-view
[~HUAWEI] nqa test-instance user test
[*HUAWEI-nqa-user-test] test-type pwe3trace
[*HUAWEI-nqa-user-test] tracert-livetime first-ttl 5 max-ttl 20