4000 Router Series Interface Configuration Guide

Step Command Remarks

17. Set the CRC mode

crc { 16 | 32 | none } By default, 16-bit CRC is adopted.

Displaying and maintaining CE1/PRI interfaces

Execute display commands in any view and reset commands in user view.

Task Command

Display the status of a CE1/PRI interface.

display controller e1 [interface-number ]

Display the status of a channel set or PRI set.

display interface serial interface-number:set-number

Clear the controller counter for a CE1/PRI interface. reset counters controller e1 [ interface-number ]

Configuring a CT1/PRI interface

Overview

A CT1/PRI interface can operate only in channelized mode. It can be used in the following two ways:

• When it is operating as a CT1 interface, all the timeslots (numbered 1 to 24) can be randomly

divided into groups. Each of these groups can form one channel set for which the system

automatically creates an interface logically equivalent to a synchronous serial interface. This

interface supports link layer protocols such as PPP, HDLC, FR, LAPB, and X.25, and network

protocols such as IP and IPX.

• When it is operating as a PRI interface, timeslot 24 is used as a D channel for signaling transmission.

Therefore, only a group of timeslots except timeslot 24 can be chosen as the B channel. This timeslot

group is bundled together with timeslot 24 to form a PRI set. This PRI set will work as an interface

logically equivalent to an ISDN PRI interface where you can configure PPP at the data link layer, IP

at the network layer, DCC, and other configurations.

Configuration procedure (in CT1 mode)

To configure a CT1/PRI interface in CT1 mode:

Step Command Remarks

1. Enter system view.

system-view N/A

2. Enter CT1/PRI interface view.

controller t1 number N/A

3. Bundle timeslots on the

interface into a channel set.

channel-set set-number timeslot-list

list [ speed { 56k | 64k } ]

By default, no channel sets are

bundled.

The default timeslot speed is 64

kbps.

4. (Optional.) Set other interface

parameters.

See "Configuring other CT1/PRI

interface parameters."

N/A