Adding an ATM-over-SHDSL Interface

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Chassis level in the configuration hierarchy.

1. In the configuration editor hierarchy, select Configuration>View and Edit>Edit Configuration.
2. Next to Chassis, click Configure.

From the top of the configuration hierarchy, add the interface to the chassis:

set chassis fpc 6 pic 0 shdsl pic-mode 4-port-atm

Set the ATM-over-SHDSL mode on the G.SHDSL PIM, if required. By default, the G.SHDSL PIM is enabled in 2-wire Annex B mode. To configure the 4-wire mode on the G.SHDSL PIM, follow the tasks in this table.

The configuration editor uses standard JUNOS names for Services Router hardware and interfaces. “PIC” indicates the PIM. The FPC value identifier identifies the chassis slot, from 1 through 6, in which the PIM is installed. The slot value is always 0 on J-series Services Routers. See Interfaces Overview.

1. Next to Fpc, click Add new entry.
2. In the Slot box, type 6.
3. Next to Pic, click Add new entry.
4. In the Slot box, type 0.
5. Next to Shdsl, click Configure.
6. From the Pic mode menu, select 4-port-atm.
7. Click OK.

Navigate to the Interfaces level in the configuration hierarchy.

1. In the configuration editor hierarchy, select Configuration>View and Edit>Edit Configuration.
2. Next to Interfaces, click Edit.

From the top of the configuration hierarchy, create and name the interface:

edit interfaces at-2/0/0

Create the new interface—for example, at-2/0/0.

1. Next to Interface, click Add new entry.
2. In the Interface name box, type at-2/0/0.
3. Click OK.

Configure ATM virtual path identifier (VPI) options for the interface.

• ATM VPI—A number between 0 and 255—for example, 25.
• Operation, Maintenance, and Administration (OAM) F5 loopback cell thresholds (“liveness”) on ATM virtual circuits. The range is between 1 and 255, and the default is 5 cells.
  • Down count—Number of consecutive OAM loopback cells an ATM virtual circuit must lose to be identified as unavailable—for example, 200.
  • Up count—Number of consecutive OAM loopback cells an ATM virtual interface must receive to be identified as operational—for example, 200.
• OAM period—Interval, in seconds, at which OAM cells are transmitted on ATM virtual circuits—for example, 100. The range is between 1 and 900 seconds.

1. Next to Atm options, click Configure.
2. Next to Vpi, click Add new entry.
3. In the Vpi number box, type 25.
4. In the Actions box, click Edit.
5. Next to Oam liveness, click Configure.
6. In the Down count box, type 200.
7. In the Up count box, type 200.
8. Click OK.
9. Next to Oam period, click Configure.
10. From the Oam period choices list, select Oam period.
11. In the Oam period box, type 100.
12. Click OK.

1. To configure the VPI value, enter

   set atm-options vpi 25

2. To configure OAM liveness values on a VPI, enter

   set atm-options vpi 25 oam-liveness up-count 200 down-count 200

3. To configure the OAM period, enter

   set atm-options vpi 25 oam-period 100

Configure the encapsulation type—for example, ethernet-over-atm.

• atm-pvc—ATM permanent virtual circuits is the default encapsulation for ATM-over-ADSL interfaces.

  For PPP over ATM (PPPoA) over SHDSL interfaces, use this type of encapsulation.

• ethernet-over-atm—Ethernet over ATM encapsulation.

  For PPP over Ethernet (PPPoE) over ATM-over-SHDSL interfaces that carry IPv4 traffic, use this type of encapsulation.

1. From the Encapsulation list, select ethernet-over-atm.
2. Click OK.

Enter

set encapsulation ethernet-over-atm

Set the annex type.

• Annex A—Used in North American network implementations.
• Annex B—Used in European network implementations.

1. Next to Shdsl options, click Configure.
2. From the Annex list, select Annex-a.

Enter

set shdsl-options annex annex-a

Configure the SHDSL line rate for the ATM-over-SHDSL interface–for example, automatic selection of the line rate.

The following values are available:

• auto—Automatically selects a line rate. This option is available only on two-wire G.SHDSL PIMs and is the default value.
• 192 Kbps or higher—Speed of transmission of data on the SHDSL connection.

In the four-wire mode, the G.SHDSL PIM has a default line rate value of 4608 Kbps.

From the Line Rate list, select auto.

Enter

set shdsl-options line-rate auto

Configure the loopback option for testing the SHDSL connection integrity–for example, local loopback.

The following values are available:

• local—Used for testing the SHDSL equipment with local network devices.
• payload—Used to command the remote configuration to send back the received payload.
• remote—Used to test SHDSL with a remote network configuration.

From the Loopback list, select local.

Enter

set shdsl-options loopback local

Configure the signal-to-noise ratio (SNR) margin to between –10 dB and 10 dB—for example, 5 dB for either or both of the following thresholds:

• current—Line trains at higher than current noise margin plus SNR threshold.
• snext—Line trains at higher than self-near-end crosstalk (SNEXT) threshold. The default value is disabled.

Setting the SNR creates a more stable SHDSL connection by making the line train at a SNR margin higher than the threshold. If any external noise below the threshold is applied to the line, the line remains stable. You can also disable the SNR margin thresholds.

1. Next to Snr margin, select Yes, then click Configure.
2. From the Current list, select Enter Specific Value.
3. In the Value box, type 5.
4. From the Snext list, select Enter Specific Value.
5. In the Value box, type 5.
6. Click OK until you return to the Interfaces page.

1. Enter

   set shdsl-options snr-margin current 5

2. Enter

   set shdsl-options snr-margin snext disabled

Add the logical interface.

Set a value from 0 and 16385—for example, 3.

Add other values if required by your network.

1. Scroll down the page to Unit, and click Add new entry.
2. In the Interface unit number box, type 3.
3. Enter other values in the fields required by your network.

Enter

set unit 3

Configure encapsulation for the ATM-for-SHDSL logical unit—for example, atm-nlpid.

The following encapsulations are supported on the ATM-over-SHDSL interfaces that use inet (IP) protocols only:

• atm-vc-mux—Use ATM virtual circuit multiplex encapsulation.
• atm-nlpid—Use ATM network layer protocol identifier (NLPID) encapsulation.
• atm-cisco-nlpid—Use Cisco NLPID encapsulation.
• ether-over-atm-llc—For interfaces that carry IPv4 traffic, use Ethernet over LLC encapsulation. You cannot configure multipoint interfaces if you use this type of encapsulation.

The following encapsulations are supported on the ATM-over-SHDSL for PPP-over-ATM (PPPoA) interfaces only. (For a sample PPPoA configuration, see Verifying Interface Configuration.)

• atm-ppp-llc—AAL5 logical link control (LLC) encapsulation.
• atm-ppp-vc-mux—Use AAL5 multiplex encapsulation.

Other encapsulation types supported on the ATM-over-SHDSL interfaces:

• ppp-over-ether-over-atm-llc—Use PPP over Ethernet over ATM LLC encapsulation. When you use this encapsulation type, you cannot configure the interface address. Instead you configure the interface address on the PPP interface.
• atm-snap—Use ATM subnetwork attachment point (SNAP) encapsulation.

From the Encapsulation list, select atm-nlpid.

Enter

set unit 3 encapsulation atm-nlpid

Add the Family protocol type—for example, inet.

Select inet, and then click Configure.

Enter

set unit 3 family inet

Commands vary depending on the protocol type.

Configure ATM virtual channel identifier (VCI) options for the interface.

• ATM VCI type—vci.
• ATM VCI value—A number between 0 and 4089—for example, 35, with VCI's 0 through 31 reserved.
• Operation, Maintenance, and Administration (OAM) F5 loopback cell thresholds (“liveness”) on ATM virtual circuits. The range is between 1 and 255, and the default is 5 cells.
  • Down count—Number of consecutive OAM loopback cells an ATM virtual circuit must lose to be identified as unavailable—for example, 200.
  • Up count—Number of consecutive OAM loopback cells an ATM virtual interface must receive to be identified as operational—for example, 200.
• OAM period—Interval, in seconds, at which OAM cells are transmitted on ATM virtual circuits—for example, 100. The range is between 1 and 900 seconds.

1. From the Vci type list, select vci.
2. In the Vci box, type 35.
3. Next to Oam liveness, click Configure.
4. In the Down count box, type 200.
5. In the Up count box, type 200.
6. Click OK.
7. Next to Oam period box, click Configure.
8. From the Oam period list, select Oam period.
9. In the Oam period box, type 100.
10. Click OK.

1. To configure the VCI value, enter

   set unit 3 vci 35

2. To configure OAM liveness values on a VCI, enter

   set unit 3 vci 35 oam-liveness up-count 200 down-count 200

3. To configure the OAM period, enter

   set unit 3 vci 35 oam-period 100