close

keyboard_arrow_left

Table of Contents Expand all

play_arrow Overview
play_arrow Initial Configuration
- Initial Configuration on NFX150 Devices
- Zero Touch Provisioning on NFX Series Devices
play_arrow Generating YANG Files
- YANG files on NFX150 Devices
play_arrow Configuring Interfaces
play_arrow Configuring USB Pass-Through on NFX Series Devices
- Supporting File Transfer from USB on NFX Series Devices
- Installing Software on NFX Devices Using USB Autoinstallation
play_arrow Configuring Security
play_arrow Configuring VNFs
play_arrow Configuring Mapping of Address and Port with Encapsulation (MAP-E)
- Mapping of Address and Port with Encapsulation on NFX Series Devices
- Configuring MAP-E on NFX Series Devices
play_arrow Configuring High Availability
- Chassis Cluster on NFX150 Devices
- Upgrading or Disabling a Chassis Cluster on NFX150 Devices
play_arrow Configuring Service Chaining
play_arrow Monitoring and Troubleshooting
play_arrow Configuration Statements and Operational Commands
- Junos CLI Reference Overview

list Table of Contents

English

ADSL2 and ADSL2+ Interfaces on NFX150 Devices

date_range 24-Nov-23

arrow_backward

arrow_forward

ADSL Interface Overview

Asymmetric digital subscriber line (ADSL) technology is part of the xDSL family of modem technologies that use existing twisted-pair telephone lines to transport high-bandwidth data. ADSL lines connect service provider networks and customer sites over the "last mile" of the network—the loop between the service provider and the customer site.

ADSL transmission is asymmetric because the downstream bandwidth is typically greater than the upstream bandwidth. The typical bandwidths of ADSL2 and ADSL2+ circuits are defined in Table 1.

Table 1: Standard Bandwidths of DSL Operating Modes
Operating Modes	Upstream	Downstream
ADSL2	1—1.5 Mbps	12—14 Mbps
ADSL2+	1—1.5 Mbps	24—25 Mbps

ADSL2 and ADSL2+ support the following standards:

LLCSNAP bridged 802.1q
VC MUX bridged

The ADSL Mini-PIM facilitates a maximum of 10 virtual circuits on supported security devices.

Supported security devices with Mini-PIMs can use PPP over Ethernet over ATM (PPPoEoA) and PPP over ATM (PPPoA) to connect through ADSL lines only.

ADSL2 and ADSL2+

The ADSL2 and ADSL2+ standards were adopted by the ITU in July 2002. ADSL2 improves the data rate and reach performance, diagnostics, standby mode, and interoperability of ADSL modems.

ADSL2+ doubles the possible downstream data bandwidth, enabling rates of 20 Mbps on telephone lines shorter than 5000 feet (1.5 km).

ADSL2 uses seamless rate adaptation (SRA) to change the data rate of a connection during operation with no interruptions or bit errors. The ADSL2 transceiver detects changes in channel conditions—for example, the failure of another transceiver in a multicarrier link—and sends a message to the transmitter to initiate a data rate change. The message includes data transmission parameters such as the number of bits modulated and the power on each channel. When the transmitter receives the information, it transitions to the new transmission rate.

Configuring ADSL SFP Interface Using VLANs on NFX150 Network Services Platform

Note:

Ensure that connectivity to the host is not lost during the configuration process.

To configure ADSL SFP interfaces on NFX150 devices:

Connect to the host.
```
user@host> configure
[edit]
user@host#
```

Configure the WAN side front panel port with vlan-tagging.

content_copy zoom_out_map
user@host# set interfaces virtual-interface-name vlan-tagging

content_copy zoom_out_map
user@host# set interfaces ge-1/0/1 vlan-tagging

Configure a VLAN for the WAN side front panel port.

content_copy zoom_out_map
user@host# set interfaces virtual-interface-name unit 0 vlan-id vlan-id

content_copy zoom_out_map
user@host# set interfaces ge-1/0/1 unit 0 vlan-id 152

Configure the WAN side front panel port with an IP address.

content_copy zoom_out_map
set interfaces virtual-interface-name unit 0 family inet address ip-address

content_copy zoom_out_map
user@host# set interfaces ge-1/0/1 unit 0 family inet address 152.1.1.152/24

Configure the physical (heth) interface with ADSL SFP options.
```
user@host# set vmhost interfaces physical-interface-name dsl-sfp-options adsl-options vpi vpi vci vci encap encapsulation
```
```
user@host# set vmhost interfaces heth-0-4 dsl-sfp-options adsl-options vpi 8 vci 36 encap llcsnap-bridged-802.1q
```
Note:
The default value for encap is llcsnap-bridged-802.1q.

The ADSL SFP interface is enabled only if you configure vci and vpi. By default, vci and vpi are disabled.

Map the physical (heth) interfaces to the virtual (ge) interfaces.

content_copy zoom_out_map
user@host# set vmhost virtualization-options interfaces virtual-interface-name mapping interface physical-interface-name

content_copy zoom_out_map
user@host# set vmhost virtualization-options interfaces ge-1/0/1 mapping interface heth-0-4

Commit the configuration.
```
user@host# commit and-quit
user@host> exit
```

To verify the configuration, enter the show interfaces heth-0-4 command.

content_copy zoom_out_map
[edit]
user@host# show interfaces heth-0-4
Physical interface: heth-0-4, Enabled, Physical link is Up
  Link-level type: Ethernet, Media type: Fiber, MTU: 9192, ADSL2P mode, Speed: 1Gbps, Duplex: Full-duplex, Auto-negotiation: Disabled
  ADSL status:
    Modem status  : Showtime (Adsl2plus)
    DSL mode      :     Auto    Annex A
  Device flags   : Present Running
  Current address: 58:00:bb:ac:c8:51, Hardware address: 58:00:bb:ac:c8:51

Configuring ADSL SFP Interface Without Using VLANs on NFX150 Network Services Platform