Technical Documentation

SRX 210 Services Gateway T1 Interface Configuration

To configure a T1 interface:

  1. Select Configuration > Quick Configuration > Interfaces if the Interfaces Quick Configuration page is not displayed.
  2. Enter information into the Interfaces Quick Configuration page, as described in Table 1.
  3. Click one of the following buttons:
    • Click OK to apply the configuration and return to the J-Web Quick Configuration page.
    • Click Cancel to cancel your entries and return to the J-Web Quick Configuration page.

The properties you can configure on a T1 interface are displayed, as shown in Figure 1.

Figure 1: T1 Interface Quick Configuration Page

Image g031004.gif

Table 1: T1 Quick Configuration Summary

Field

Function

Your Action

Logical Interfaces

Add Logical Interfaces

Defines one or more logical units that you connect to this physical T1 interface. You must define at least one logical unit for a T1 interface. You can define multiple units if the encapsulation type is Frame Relay.

Click Add.

Logical Interface Description

(Optional) Describes the logical interface.

Type a text description of the logical interface to more clearly identify it in monitoring displays.

IPv4 Addresses and Prefixes

Specifies one or more IPv4 addresses for the interface.

  1. Type one or more IPv4 addresses and prefixes. For example:

    10.10.10.10/24

  2. Click Add.
  3. Click OK.

Physical Interface Description

(Optional) Adds supplementary information about the physical T1 interface.

Type a text description of the T1 interface to more clearly identify it in monitoring displays.

MTU (bytes)

Specifies the maximum transmission unit size for the T1 interface.

Type a value between 256 and 1504 bytes. The default MTU for T1 interfaces is 1504.

Clocking

Specifies the transmit clock source for the T1 line.

From the list, select one of the following:

  • internal—Services gateway's own system clock (the default)
  • external—Clock received from the T1 interface

Per Unit Scheduler

Enables scheduling on logical interfaces.

Allows you to configure multiple output queues on a logical interface and associate an output scheduler and shaping rate with the queues.

  • To enable scheduling, select the box.
  • To disable scheduling, clear the box.
Encapsulation

Encapsulation

Specifies the encapsulation type for traffic on the interface.

From the list, select the encapsulation for this T1 interface:

  • PPP
  • Frame Relay
  • Cisco HDLC

Enable CHAP

Enables or disables Challenge Handshake Authentication Protocol (CHAP) authentication on a T1 interface with PPP encapsulation only.

  • To enable CHAP, select the box.
  • To disable CHAP, clear the box.
CHAP Local Identity (available if CHAP is enabled)

Use System Host Name

Specifies that the T1 interface uses the services gateway's system hostname in CHAP challenge and response packets.

  • To enable, select the box (the default).
  • To disable, clear the box.

Local Name

If Use System Host Name is disabled, specifies the local name for CHAP to use.

Type a local name for this T1 interface.

CHAP Peer Identity

Identifies the client or peer with which the services gateway communicates on this T1 interface.

Type the CHAP client name.

CHAP Secret

Specifies the secret password for CHAP authentication, known to both sides of the connection.

Type a password that is known to the other side of the connection. Use a combination of letters and numbers that is difficult for others to guess.

T1 Options

Bert Algorithm

Specifies the bit error rate test (BERT) algorithm to use during a BERT.

BERT is supported only when transmission is unframed. (See the Unframed option.)

TBD

Bert Error Rate

Specifies the exponent n in the bit error rate 10–n.

Type a value between 3 and 7, or 0. For example, a value of 6 specifies that 1 bit out of 1,000,000 is transmitted in error. The default is 0 (no bits are transmitted in error).

Bert Period

Specifies the length of time—in seconds—of the BERT.

Type a value between 1 and 240. The default is 10.

Byte Encoding

Specifies the byte encoding method.

From the list, select one of the following:

  • nx56—7 bits per byte
  • nx64—8 bits per byte (the default)

Frame Checksum

Specifies the number of bits in the frame checksum. A 32-bit checksum provides more reliable packet verification but is not supported by some older equipment.

Select 16 or 32. The default value is 16.

Framing Mode

Specifies the framing mode for the T1 line.

From the list, select one of the following:

  • esf—Extended superframe (the default)
  • sf—Superframe

Invert Data

Enables or disables data inversion. Data inversion is normally used only in alternate mark inversion (AMI) mode.

  • To enable, select the box.
  • To disable, clear the box.

Line Buildout

Specifies the T1 line buildout in feet for cables 655 feet (200 m) or shorter, or in decibels for longer cables.

Line buildout compensates for the loss in decibels based on the distance from the device to the first repeater in the circuit.

From the list, select one of the following line buildouts:

  • 0–132 (0–40 m) (the default)
  • 133–265 (40–81 m)
  • 266–398 (81–121 m)
  • 399–531 (121–162 m)
  • 532–655 (162–200 m)
  • long-0db
  • long-7.5db
  • long-15db
  • long-22.5db

Line Encoding

Specifies the line encoding method.

From the list, select one of the following:

  • ami—Alternate mark inversion
  • b8zs—Binary 8 zero substitution (the default)

Loopback

Configures the T1 interface as a loopback interface for testing purposes.

When T1 is configured as a local loopback interface, the device transmits test traffic simultaneously to the CSU and to the receiver at the T1 interface.

When T1 is configured as a remote loopback interface, test traffic transmitted by the CSU is simultaneously received at the T1 interface and transmitted back to the CSU.

From the Loopback list, select one of the following:

  • local—Traffic loops from the transmitter to the receiver at the T1 interface during tests.
  • remote—Traffic loops from the receiver to the transmitter at the T1 interface during tests.

Timeslots

Specifies the number of time slots allocated to a fractional T1 interface. By default, a T1 interface uses all the time slots.

Type numeric values from 1 through 24. You can use any combination of time slots. To configure ranges, use hyphens. To configure discontinuous slots, use commas. For example:

1–5,10,24

CLI

set interface t1-1/0/0 unit 0 family inet address <ipaddress/mask>

set security zones security-zone zone1 interfaces t1-1/0/0.0 host-inbound-traffic system-services all

set security zones security-zone zone1 interfaces t1-1/0/0.0 host-inbound-traffic protocols all

set security policies default-policy permit-all