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Example: Configuring TWAMP Client and Server on MX Series Routers

This example shows how to configure the TWAMP client and server and contains the following sections.

Requirements

This example uses the following hardware and software components:

  • MX Series routers.

  • Junos OS Release 15.1 or later.

Overview

This example explains the Two-Way Active Measurement Protocol (TWAMP). TWAMP is an open protocol for measuring network performance between any two devices supporting the TWAMP protocol. The TWAMP-Control protocol is used to set up performance measurement sessions. The TWAMP-Test protocol is used to send and receive performance measurement probes.

The TWAMP architecture is composed of the following entities that are responsible for starting a monitoring session and exchanging packets:

  • The control client initiates all requested test sessions with a start sessions message, and the server acknowledges. When necessary, the control client sends a message to stop all test sessions.

  • The session sender and the session reflector exchange test packets according to the TWAMP-Test protocol for each active session. On receiving a TWAMP-Test packet, the session reflector only reflects a measurement packet and does not collect packet statistics in TWAMP.

The TWAMP server is an end system that manages one or more TWAMP sessions and is also capable of configuring per-session ports. The server listens on the TCP port. The session reflector and server make up the TWAMP responder in an IP service-level agreement operation.

For 15.1, both the control client and session sender would be residing on the same Juniper router. The client design does not mandate the server and the session reflector to be on the same system. Hence the Juniper TWAMP client will also be capable of working with a third-party server implementation.

Configuration for TWAMP client

CLI Quick Configuration

To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI, at the [edit] hierarchy level, of SG1 router.

Configuring Interfaces

Configuring Chassis

Configuring Services

Configuring TWAMP client

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy.

  1. Configure the interfaces.

  2. Configure the chassis.

  3. Configure the services.

Results

From the configuration mode of Router 1, confirm your configuration by entering the show interfaces, show access, and show services commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

Configuration for TWAMP server

CLI Quick Configuration

To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI, at the [edit] hierarchy level, of SG1 router.

Configuring Interfaces

Configuring Chassis

Configuring Services

Configuring TWAMP server

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy.

  1. Configure the interfaces.

  2. Configure the chassis.

  3. Configure the services.

Results

From the configuration mode of Router 1, confirm your configuration by entering the show interfaces, show access, and show services commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

Verification

Verifying TWAMP server sessions

Purpose

Verify that the TWAMP server sessions are established.

Action

From operational mode, enter the show services rpm twamp server session command.

Verifying TWAMP client sessions

Purpose

Verify that the TWAMP client sessions are established.

Action

From operational mode, enter the show services rpm twamp client session command.