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VDSL2 Interfaces

 
Summary

Learn about VDSL2 interface details and how to configure the interfaces on security devices.

VDSL2 Interface Overview

Very-high-bit-rate digital subscriber line (VDSL) technology is part of the xDSL family of modem technologies, which provide faster data transmission over a single flat untwisted or twisted pair of copper wires. Table 1 specifies the key details of the VDSL2 interface.

Table 1: VDSL2 Interface Details

Interface Details

Description

Interface name

SRX-MP-1VDSL2-R

Supported on

For information about platforms support, see hardware compatibility tool (HCT).

Interface type

  • pt- represents VDSL2 interface when you configure pt- to function as VDSL2.

  • Interface pt-1/0/0 comes up by default.

Use cases

  • Connects you and the service provider networks over a single connection to provide high bandwidth applications (triple-play services) like high-speed Internet access, Telephone services (VoIP (Voice over IP protocol), High-Definition TV (HDTV)), and Interactive gaming services.

  • VDSL2 carries the data and multimedia on the copper wire without interrupting the line's ability to carry voice signals. VDSL2 provides an ADSL interface in an ATM DSLAM topology and a VDSL2 interface in an IP or VDSL DSLM topology.

For information on VDSL2 hardware specifications, see 1-Port VDSL2 Annex A Mini-Physical Interface Module (SRX-MP-1VDSL2-R).

Features Supported on the VDSL2 Interface

Table 2 describes the key features supported on VDSL2 interface.

Table 2: Key Features Supported on VDSL2

Feature

Description

Packet Transfer Mode (PTM)

  • Uses the named interface pt-1/0/0 and transports packets (IP, PPP, Ethernet, MPLS, and so on) over DSL links as an alternative to using Asynchronous Transfer Mode (ATM).

  • Based on the Ethernet in the First Mile (EFM) IEEE802.3ah standard.

Discrete multitone (DMT) modulation

  • Separates a digital subscriber line signal to a usable frequency range of 256 frequency bands (or channels) with 4.3125 KHz each.

  • Uses the Fast Fourier Transform (FFT) algorithm for demodulation or modulation for increased speed.

Backward compatibility

  • Backward compatible with most ADSL interface standards.

  • In ADSL fallback mode, VDSL2 operates on the ATM encapsulation interface in the first mile and uses the interface at-1/0/0.

  • Takes about 60 seconds to switch from VDSL2 to ADSL or from ADSL to VDSL2 operating modes.

Vectoring

  • Employs coordination of line signals to reduce crosstalk levels to provide improved performance.

  • The ITU-T G.993.5 standard also known as G.vector, describes vectoring for VDSL2.

IPv6 Support

  • Supports IPv6 on the DSL encapsulations like ATM physical interface encapsulations, atm-pvc, ethernet-over-atm, ethernet-over-atm, and ATM logical interface encapsulations except for atm-vc-mux and ppp-over-ether-over-atm-llc.

  • To configure IPv6 addresses on DSL interfaces in ATM or PTM mode, include the family protocol type as inet6.

For more information on supported features and profiles on VDSL2 interfaces, see1-Port VDSL2 Annex A Mini-Physical Interface Module (SRX-MP-1VDSL2-R).

VDSL2 Network Deployment Topology

The VDSL2 interface uses either Gigabit Ethernet or fiber as second mile to connect to the Broadband Remote Access Server (B-RAS). Figure 1 shows a typical VDSL2 network topology.

Figure 1: Typical VDSL2 End-to-End Connectivity and Topology Diagram
Typical
VDSL2 End-to-End Connectivity and Topology Diagram

The ADSL interface uses either Gigabit Ethernet or OC3/DS3 ATM as the second mile to connect to the B-RAS. Figure 2 shows a backward-compatible ADSL topology using ATM DSLAM.

Figure 2: Backward-Compatible ADSL Topology (ATM DSLAM)
Backward-Compatible
ADSL Topology (ATM DSLAM)

Example: Configure VDSL2 Interface

In this example you configure the VDSL2 interface and VDSL2 interface on VDSL2 Mini-PIMs. On VDSL2 Mini-PIMs, the pt-1/0/0 interface is created by default. You can switch to ADSL mode by configuring at-1/0/0. You can deactivate pt-1/0/0 before you create at-1/0/0 or deactivate at-1/0/0 to create pt-1/0/0. Make sure that you have deleted the previous configurations on pt-1/0/0 and pp0.

In this example:

  1. Begin a new configuration on a VDSL2 Mini-PIM.

  2. Deactivate previous interfaces and delete the old configuration.

  3. Set the interfaces with the VDSL profile and the Layer 3 configuration for the end-to-end data path.

  4. Configure the PPPoE on the pt-1/0/0 interface with a static IP address or CHAP authentication with unnumbered IP address (PAP authentication or CHAP authentication).

  5. Configure PPPoE on the pt-1/0/0 interface with negotiated IP address (PAP authentication or CHAP authentication).

To configure VDSL2 Interfaces in ADSL mode:

  1. Configure the ADSL interface for end-to-end data path.

  2. Configure PPPoA on the at-1/0/0 interface with a negotiated IP address and either PAP authentication or CHAP authentication.

  3. Configure a static IP address and an unnumbered IP address (and either PAP authentication or CHAP authentication) for PPPoA on the at-1/0/0 interface.

  4. Configure PPPoE on the at-1/0/0 interface with a negotiated IP address and either PAP authentication or CHAP authentication.

Table 3 specifies the CLI quick configuration commands used for configuring VDSL2 interfaces.

Table 3: CLI Quick Configuration

Configuration Step

CLI Quick Configuration Commands

Configure the VDSL2 interface and enable VLAN tagging

set interfaces pt-1/0/0 vdsl-options vdsl-profile auto
set interfaces pt-1/0/0 vlan-tagging
set interfaces pt-1/0/0 unit 0 vlan-id 100

Begin a new configuration on a VDSL2 Mini-PIM

[edit]
deactivate interface pt-1/0/0
deactivate interface at-1/0/0
delete interface pt-1/0/0
delete interface pp0

Configure VDSL2 Mini-PIM for End-to-End Data Path

set interfaces pt-1/0/0 vdsl-options vdsl-profile 17a
set interfaces pt-1/0/0 unit 0 family inet address 11.11.11.1/24

Configure PPPoE on the pt-1/0/0 Interface with a Static IP Address

user@host# set interfaces pt-1/0/0 vdsl-options vdsl-profile 17a
user@host# set interfaces pt-1/0/0 unit 0 encapsulation ppp-over-ether
user@host# set interfaces pp0 unit 0 ppp-options pap access-profile pap_prof local-name locky local-password india passive
user@host# set interfaces pp0 unit 0 pppoe-options underlying-interface pt-1/0/0.0 auto-reconnect 120 client
user@host# set interfaces pp0 unit 0 family inet address 10.1.1.6/24
user@host# set access profile pap_prof authentication-order password client cuttack pap-password india

Configure PPPoE on the pt- Interface with a Static IP Address (CHAP Authentication)

user@host# set interfaces pt-1/0/0 vdsl-options vdsl-profile 17a
user@host# set interfaces pt-1/0/0 unit 0 encapsulation ppp-over-ether
user@host# set interfaces pp0 unit 0 ppp-options chap default-chap-secret india local-name locky passive
user@host# set interfaces pp0 unit 0 pppoe-options underlying-interface pt-1/0/0.0 auto-reconnect 120 client
user@host# set interfaces pp0 unit 0 family inet address 10.1.1.6/24

Configure PPPoE on the pt-x/x/x Interface with Unnumbered IP (PAP Authentication)

user@host# set interfaces pt-1/0/0 vdsl-options vdsl-profile 17a
user@host# set interfaces pt-1/0/0 unit 0 encapsulation ppp-over-ether
user@host# set interfaces lo0 unit 0 family inet address 10.1.1.24/32
user@host# set interfaces pp0 unit 0 ppp-options pap access-profile pap_prof local-name locky local-password india passive
user@host# set interfaces pp0 unit 0 pppoe-options underlying-interface pt-1/0/0.0 auto-reconnect 120 client
user@host# set interfaces pp0 unit 0 family inet unnumbered-address lo0.0 destination 10.1.1.1
user@host# set access profile pap_prof authentication-order password client cuttack pap-password india

Configure PPPoE on the pt-1/0/0 Interface with Unnumbered IP (CHAP Authentication)

user@host# set interfaces pt-1/0/0 vdsl-options vdsl-profile 17a
user@host# set interfaces pt-1/0/0 unit 0 encapsulation ppp-over-ether
user@host# set interfaces lo0 unit 0 family inet address 10.1.1.24/32
user@host# set interfaces pp0 unit 0 ppp-options chap default-chap-secret india local-name locky passive
user@host# set interfaces pp0 unit 0 pppoe-options underlying-interface pt-1/0/0.0 auto-reconnect 120 client
user@host# set interfaces pp0 unit 0 family inet unnumbered-address lo0.0 destination 10.1.1.1

Configure PPPoE on the pt-1/0/0 Interface with Negotiated IP (PAP Authentication)

user@host# set interfaces pt-1/0/0 vdsl-options vdsl-profile 17a
user@host# set interfaces pt-1/0/0 unit 0 encapsulation ppp-over-ether
user@host# set interfaces pp0 unit 0 ppp-options pap access-profile my_prf local-name purple local-password <password> passive
user@host# set interfaces pp0 unit 0 pppoe-options underlying-interface pt-1/0/0.0 auto-reconnect 120 client
user@host# set interfaces pp0 unit 0 family inet negotiate-address
user@host# set access profile my_prf authentication-order password
user@host# set access profile my_prf

Configure PPPoE on the pt-1/0/0 Interface with Negotiated IP (CHAP Authentication)

user@host# set interfaces pt-1/0/0 vdsl-options vdsl-profile 17a
user@host# set interfaces pt-1/0/0 unit 0 encapsulation ppp-over-ether
user@host# set interfaces pp0 unit 0 ppp-options chap default-chap-secret <password> local-name purple passive
user@host# set interfaces pp0 unit 0 pppoe-options underlying-interface pt-1/0/0.0 auto-reconnect 120 client
user@host# set interfaces pp0 unit 0 family inet negotiate-address

Configure the VDSL2 Interface and Enable VLAN Tagging

In this example, you create a VDSL2 interface called pt-1/0/0 and set the VDSL2 profile to auto. For more information on basic connectivity refer to Quick Start Guide and to configure network interfaces refer to Example: Creating an Ethernet Interface. To configure the VDSL2 interfaces and enable VLAN tagging:

  1. Create an interface.
  2. Set the VDSL2 profile type.
  3. Specify the logical unit to connect to the physical VDSL2 interface.
  4. Specify the family protocol type.
  5. Enable VLAN tagging on the pt- interface.
  6. Specify the VLAN ID value.
  7. Commit the configuration.

    VDSL2 is supported only on the pt- interface.The range of VLANs that can be configured is 0 to 4093.

Similarly, you can configure the VDSL2 interface on Annex B (integrated VDSL2 interfaces in ADSL backward compatible mode). After completing the configuration successfully, view the parameters by using the show interfaces pt-1/0/0 command.

Configure VDSL2 Interface with VDSL2 Mini-PIMs

This example uses VDSL2 Mini-PIMs. Figure 3 shows typical SRX Series devices with VDSL2 Mini-PIM network connections.

Figure 3: SRX Series Device with VDSL2 Mini-PIMs in an End-to-End Deployment Scenario
SRX Series Device
with VDSL2 Mini-PIMs in an End-to-End Deployment Scenario

To view the CLI quick configuration commands, see Table 3.

To begin a new configuration on a VDSL2 Mini-PIM:

  1. Deactivate any previous interfaces.
  2. Delete any old configurations.
  3. Commit the configuration.

Use the show chassis fpc command to see the output of the configuration.

Configure the VDSL2 Mini-PIM for End-to-End Data Path

To configure the VDSL2 Mini-PIM for end-to-end data path:

  1. Configure the interfaces with the VDSL profile and the Layer 3 configuration for the end-to-end data path.
  2. Commit the configuration.

Use the show interfaces pt-1/0/0 command to see the output of the configuration.

Configure PPPoE on the pt-1/0/0 Interface with a Static IP Address

To configure the PPPoE on the pt-1/0/0 interface with a static IP address:

  1. Configure the VDSL options and encapsulation for the interface.
  2. Configure the PPP options for the interface.
  3. Configure the PPPoE options for the interface.
  4. Configure the IP address for the interface.
  5. Configure the access profile for the interface.
  6. Commit the configuration.

Use the show interfaces pp0, show interfaces pt-1/0/0 and show access profile pap_prof commands to see the output of the configuration.

Configure PPPoE on the pt-1/0/0 Interface with a Static IP Address (CHAP Authentication)

To configure the PPPoE on the pt-1/0/0 interface with a static IP address (CHAP authentication):

  1. Configure the VDSL options and encapsulation for the interface.
  2. Configure the PPP options for the interface.
  3. Configure the PPPoE options for the interface.
  4. Configure the IP address for the interface.
  5. Commit the configuration.

Use the show interfaces pt-1/0/0 and show interfaces pp0 commands to see the output of the configuration.

Configure PPPoE on the pt-x/x/x Interface with Unnumbered IP (PAP Authentication)

To configure PPPoE on the pt-1/0/0 interface with unnumbered IP (PAP authentication):

  1. Configure the VDSL options and encapsulation for the interface.
  2. Configure the IP address for the interface.
  3. Configure the PPP options for the interface.
  4. Configure the PPPoE options for the interface.
  5. Configure the unnumbered address and destination for the interface.
  6. Configure the access profile for the interface.
  7. Commit the configuration.

Use the show interfaces lo0, show interfaces pt-1/0/0, and show interfaces pp0 commands to see the output of the configuration.

Configuring PPPoE on the pt-1/0/0 Interface with Unnumbered IP (CHAP Authentication)

To configure PPPoE on the pt-1/0/0 interface with unnumbered IP (CHAP authentication):

  1. Configure the VDSL options and encapsulation for the interface.
  2. Configure the IP address for the interface.
  3. Configure the PPP options for the interface.
  4. Configure the PPPoE options for the interface.
  5. Configure the unnumbered address and destination for the interface.
  6. Commit the configuration.

Use the show interfaces pp0, show interfaces pt-1/0/0, and show interfaces lo0 commands to see the output of the configuration.

Configure PPPoE on the pt-1/0/0 Interface with Negotiated IP (PAP Authentication)

To configure PPPoE on the pt-1/0/0 interface with negotiated IP (PAP authentication):

  1. Configure the VDSL options and encapsulation for the interface.
  2. Configure the PPP options for the interface.
  3. Configure the PPPoE options for the interface.
  4. Configure the negotiated IP address for the interface.
  5. Configure the access profile for the interface.
  6. Commit the configuration.

Use the show interfaces pt-1/0/0, show interfaces pp0, and show access profile my_prf commands to see the output of the configuration.

Configure PPPoE on the pt-1/0/0 Interface with Negotiated IP (CHAP Authentication)

To configure PPPoE on the pt-1/0/0 interface with negotiated IP (CHAP authentication):

  1. Configure the VDSL options and encapsulation for the interface.
  2. Configure the PPP options for the interface.
  3. Configure the PPPoE options for the interface.
  4. Configure the negotiated IP address for the interface.
  5. Commit the configuration.

Use the show interfaces pp0 and show interfaces pt-1/0/0 commands to see the output of the configuration. Similarly, you can configure the integrated VDSL2 interfaces, Annex B, in ADSL backward compatible mode by using the show interfaces pt-1/0/0 command.

Verification

Purpose

Display information about the parameters configured on the VDSL2 interface.

Action

  • To display information about the parameters configured on VDSL2 Interface connected to the DSLAM, operating in Annex A and display details of VLAN tagging:

    Similarly, you can verify the VDSL2 interface on Annex B mode by using the show interfaces pt-1/0/0 command.

  • Verify the FPC status by entering the show chassis fpc command. The VDSL2 Mini-PIM is installed in the first slot of the SRX320 device chassis; therefore, use fpc 1. For SRX340 devices, use the FPCs fpc 1, fpc 2, fpc 3, or fpc 4.

  • Verify the status of interface, modem status, time in seconds and VDSL profile of DSLAM by using the run show interface pt-1/0/0.

  • To display all the parameters configured on VDSL2 Mini-PIM for End-to-End Data Path

  • To display the PPPoE on the pt-1/0/0 Interface with a Static IP Address.

  • To display PPPoE on the pt-1/0/0 Interface with a Static IP Address (CHAP Authentication)

  • To display the PPPoE on the pt-1/0/0 Interface with Unnumbered IP (PAP Authentication)

  • To display the PPPoE on the pt-1/0/0 Interface with Unnumbered IP (CHAP Authentication)

  • To display PPPoE on the pt-1/0/0 Interface with Negotiated IP (PAP Authentication)

  • To display the PPPoE on the pt-1/0/0 Interface with Negotiated IP (CHAP Authentication)