The expected bandwidth is an informational parameter used only by higher-layer protocols for calculation. You cannot adjust the actual bandwidth of an interface by using this command.

Interfaces that support this feature include Serial interfaces/subinterfaces, E1-F interfaces, and T1-F interfaces. .

5. Configure the keepalive interval and retry limit.

¡ Set the keepalive interval.

timer-hold seconds

The default setting is 10 seconds.

¡ Set the keepalive retry limit.

timer-hold retry retries

The default setting is 5.

Interfaces that support this feature include Serial interfaces, E1-F interfaces, and T1-F interfaces. .

6. Set the MTU.

mtu size

The default setting is 1500 bytes.

Interfaces that support this feature include Serial interfaces/subinterfaces, E1-F interfaces, and T1-F interfaces..

7. Bring up the interface.

undo shutdown

By default, an interface is up.

Configuring a serial interface

Configuring a synchronous serial interface

About this task

This section only describes the interface properties configuration. Depending on the network requirements, you might also need to configure the data link layer protocol, DDR, IP address, firewall, and interface backup.

Procedure

1. Enter system view.

system-view

2. Enter synchronous serial interface view.

interface serial interface-number

3. Configure a synchronous or asynchronous serial interface to operate as a synchronous serial interface.

physical-mode sync

By default, a synchronous or asynchronous serial interface operates as a synchronous serial interface.

4. Set the link layer protocol.

link-protocol { fr | hdlc | mfr | ppp }

The default is PPP.

5. Set the digital signal coding format.

code { nrz | nrzi }

The default is non-return-to-zero (NRZ).

6. Set the clock selection mode.

¡ On DTE side:

clock { dteclk1 | dteclk2 | dteclk3 | dteclk4 | dteclk5 | dteclkauto }

¡ On DCE side:

clock { dceclk1 | dceclk2 | dceclk3 }

The default is dceclk1 for the DCE side and dteclk1 for the DTE side.

7. Set transmit-clock or receive-clock signal inversion on the DTE side.

invert { transmit-clock | receive-clock }

By default, clock signal inversion is disabled.

8. Set the line idle-code.

idle-code { 7e | ff }

The default is 0x7E.

9. Enable RTS signal reverse.

reverse-rts

By default, RTS signal reverse is disabled.

When this command is configured, the remote end is not allowed to send data while the local end is sending data.

Use this command only for debugging purposes.

10. Configure interface properties.

¡ Set the number of interframe filling tags.

itf number number

The default is four.

¡ Set the baud rate on DCE side.

baudrate baudrate

The default is 64000 bps.

¡ Set the baud rate on DTE side.

virtualbaudrate virtualbaudrate

The default is 64000 bps.

11. Configure line detection settings.

¡ Enable level detection.

detect dsr-dtr

By default, level detection is enabled.

¡ Enable data carrier detection (DCD).

detect dcd

By default, DCD is enabled.

¡ Set the CRC mode.

crc { 16 | 32 | none }

The default is 16-bit CRC.

Enabling local loopback on a serial interface

About this task

Perform this task to determine whether a serial link works correctly. This feature tests the device where the serial interface resides. The serial interface sends outgoing packets back to the local device. If the device fails to receive the packets, the device fails.

Restrictions and guidelines

After you enable this feature on a serial interface, the interface does not forward data traffic.

Procedure

1. Enter system view.

system-view

2. Enter a serial interface view.

¡ Enter synchronous serial interface view.

interface serial interface-number

3. Enable local loopback.

loopback

By default, local loopback is disabled.

Configuring a serial subinterface

1. Enter system view.

system-view

2. Create a serial subinterface and enter its view.

interface serial interface-number.subnumber [ p2mp | p2p ]

3. Configure a serial subinterface.

See "Configuring common WAN interface settings."

Enabling subinterface rate statistics collection on a serial interface

About this task

After enabling subinterface rate statistics collection on a serial interface, the device periodically refreshes the rate statistics for the subinterfaces of the serial interface. You can use the display interface serial command to view the rate statistics.

Restrictions and guidelines

This feature is resource intensive. When you enable this feature, make sure you fully understand its impact on system performance.

Procedure

1. Enter system view.

system-view

2. Enter serial interface view.

interface serial interface-number

Serial interfaces that support this feature include synchronous serial interfaces and sub-channel serial interfaces.

3. Enable subinterface rate statistics collection on the serial interface.

sub-interface rate-statistic

By default, subinterface rate statistics collection on the serial interface is disabled.

Display and maintenance commands for serial interfaces

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

Task	Command
Display serial interface information.	display interface serial [ interface-number ] [ brief [ description \| down ] ]
Clear statistics for serial interfaces.	reset counters interface serial [ interface-number ]

‌

Configuring a CE1 interface

About CE1 interfaces

A CE1 interface can operate in channelized or unchannelized mode:

· Unchannelized mode is also called E1 mode.

· Channelized modes include CE1 mode and PRI mode.

In CE1 or PRI mode, a CE1 interface is physically divided into 32 timeslots numbered 0 to 31. Timeslot 0 is used to transmit synchronizing information.

E1 mode

For a CE1 interface in E1 mode, the system automatically creates a serial interface named serial interface-number:0. This interface has the same logical features as a standard synchronous serial interface. You can configure the serial interface as described in "Configuring a synchronous serial interface."

CE1 mode

In CE1 mode, you can bundle all timeslots except timeslot 0 into a maximum of 31 channel sets.

· For each channel set, the system automatically creates a serial interface named serial interface-number:set-number. This interface has the same logical features as a standard synchronous serial interface. You can configure the serial interface as described in "Configuring a synchronous serial interface."

Configuring unchannelized mode for a CE1 interface

Configuring a CE1 interface in E1 mode

1. Enter system view.

system-view

2. Enter CE1 interface view.

controller e1 interface-number

3. Configure the interface to operate in E1 mode.

using e1

By default, a CE1 interface operates in channelized mode.

4. Enable alarm indication signal (AIS) detection.

detect-ais

By default, AIS detection is disabled.

5. Set other interface parameters.

See "Configuring other CE1 interface parameters."

Configuring channelized mode for a CE1 interface

Configuring a CE1 interface in CE1 mode

1. Enter system view.

system-view

2. Enter CE1 interface view.

controller e1 interface-number

3. Configure the interface to operate in channelized mode.

using ce1

By default, a CE1 interface operates in channelized mode.

4. Bundle timeslots on the interface into a CEM set.

cem-set set-number timeslot-list list [ signal cas ]

For each CEM set, the system automatically creates a CEM interface. The CEM interface name uses the circuit-emulation interface-number:set-number format.

5. Bundle timeslots on the interface into a channel set.

channel-set set-number timeslot-list list

For each channel set, the system automatically creates a serial interface that has the same logical features as a standard synchronous serial interface. The serial interface name uses the serial interface-number:set-number format.

6. Set the framing format.

frame-format { crc4 | no-crc4 }

The default is no-CRC4.

A CE1 interface in CE1 mode supports both CRC4 and no-CRC4 framing formats.

7. Enable RAI detection on the interface.

alarm-detect rai

By default, RAI detection is enabled on the interface.

8. Set other interface parameters.

See "Configuring other CE1 interface parameters."

Configuring other CE1 interface parameters

1. Enter system view.

system-view

2. Enter CE1 interface view.

controller e1 interface-number

3. Set the line code format.

code { ami | hdb3 }

The default is high density bipolar 3 (HDB3).

4. Enable or disable user data inversion.

data-coding { inverted | normal }

By default, user data inversion is disabled.

5. Set the cable type.

cable { long | short }

The default cable setting is long mode.

6. Set the clock mode.

clock { master | slave }

The default clock mode is slave, which is line clock.

7. Enable automatic clock mode change.

clock-change auto

By default, automatic clock mode change is disabled.

When automatic clock mode switchover is enabled, the interface automatically switches to the master clock mode when both of the following conditions exist:

¡ The interface uses the slave clock mode.

¡ The interface receives an alarm indication signal (AIS), loss of signal (LOS), or loss of frame (LOF) alarm.

After the alarm is cleared, the interface automatically switches back to the slave clock mode.

8. Set the line idle code type.

idle-code { 7e | ff }

The default is 0x7E.

9. Set the type and the number of interframe filling tags.

itf { number number | type { 7e | ff } }

By default:

¡ The type of the interframe filling tag is 0x7E.

¡ The number of interframe filling tags is four.

Enabling local loopback on a CE1 interface

About this task

Loopback is intended for testing only. Disable loopback when the interface is operating correctly.

Restrictions and guidelines

After you enable this feature on an interface, the interface does not forward data traffic.

Procedure

1. Enter system view.

system-view

2. Enter CE1 interface view.

controller e1 interface-number

3. Enable local loopback.

loopback { local | payload | remote }

By default, local loopback is disabled.

Display and maintenance commands for CE1 interfaces

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

Task	Command
Display information about CE1 interfaces.	display controller [ e1 [interface-number ] ]
Display information about a channel set.	display interface serial interface-number:set-number
Clear statistics for CE1 interfaces.	reset counters controller e1 [ interface-number ]

‌

Configuring a CT1 interface

About CT1 interfaces

A CT1/PRI interface can operate in channelized mode.

CT1 mode

In CT1 mode, you can bundle all timeslots into multiple channel sets.

Configuring a CT1 interface in CT1 mode

1. Enter system view.

system-view

2. Enter CT1 interface view.

controller t1 interface-number

3. Configure the interface to operate in channelized mode.

undo using

By default, a CT1 interface operates in channelized mode.

4. Bundle timeslots on the interface into a channel set.

channel-set set-number timeslot-list list [ speed { 56k | 64k } ]

5. Set other interface parameters.

See "Configuring other CT1 interface parameters."

Configuring other CT1 interface parameters

Configuring common settings

1. Enter system view.

system-view

2. Enter CT1 interface view.

controller t1 interface-number

3. Set the line code format.

code { ami | b8zs }

The default is B8ZS.

4. Enable or disable user data inversion.

data-coding { normal | inverted }

By default, user data inversion is disabled.

5. Set the clock mode.

clock { master | slave }

The default is slave, which is line clock.

6. Set alarm thresholds.

alarm-threshold { ais { level-1 | level-2 } | lfa { level-1 | level-2 | level-3 | level-4 } | los { pulse-detection | pulse-recovery } value }

By default:

¡ For LOS alarm, the threshold of pulse-detection is 176 and the threshold of pulse-recovery is 22. If the number of the pulses detected during the total length of 176 pulse detection intervals is smaller than 22 (the pulse-recovery threshold), a LOS alarm occurs.

¡ Both AIS alarm threshold and LFA alarm threshold are level-1.

Configuring interface properties

1. Enter system view.

system-view

2. Enter CT1 interface view.

controller t1 interface-number

3. Set the cable length and attenuation.

cable long { 0db | -7.5db | -15db | -22.5db }

cable short { 133ft | 266ft | 399ft | 533ft | 655ft }

The long 0db keyword applies by default.

4. Set the framing format.

frame-format { sf | esf }

The default is ESF.

5. Set the line idle code type.

Idle-code { 7e | ff }

The default is 0x7E.

6. Set the type and the number of interframe filling tags.

itf { number number | type { 7e | ff } }

By default:

¡ The type of the interframe filling tag is 0x7E.

¡ The number of interframe filling tags is four.

7. Set the behavior of the interface on the FDL in ESF framing.

fdl { ansi | att | both | none }

By default, FDL is disabled.

Configuring detection for a CT1/PRI interface

1. Enter system view.

system-view

2. Enter CT1 interface view.

controller t1 interface-number

3. Enable RAI detection on the interface.

alarm-detect rai

By default, RAI detection is enabled on the interface.

This command is applicable when the framing format is ESF.

4. Send remote loopback control code.

sendloopcode { fdl-ansi-llb-down | fdl-ansi-llb-up | fdl-ansi-plb-down | fdl-ansi-plb-up | fdl-att-plb-down | fdl-att-plb-up | inband-llb-down | inband-llb-up }

By default, no remote loopback control code is sent.

5. Start a bit error rate (BERT) test on the CT1 interface.

bert pattern { 2^20 | 2^15 } time minutes [ unframed ]

By default, no BERT test is performed.

Enabling local loopback on a CT1 interface

About this task

Loopback is intended for testing only. Disable loopback when the interface is operating correctly.

Restrictions and guidelines

After you enable this feature on a CT1/PRI interface, the interface does not forward data traffic.

Procedure

1. Enter system view.

system-view

2. Enter CT1 interface view.

controller t1 interface-number

3. Enable local loopback.

loopback { local | payload | remote }

By default, local loopback is disabled.

Display and maintenance commands for CT1 interfaces

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

Task	Command
Display information about CT1 interfaces.	display controller [ t1 [ interface-number ] ]
Display information about a channel set.	display interface serial interface-number:set-number
Clear statistics for CE1 interfaces.	reset counters controller t1 [ interface-number ]

‌

Configuring an E1-F interface

About E1-F interfaces

E1-F interfaces, which are fractional E1 interfaces, are simplified CE1 interfaces. They are a cost-effective alternative to CE1 interfaces for E1 access services that do not require multiple channel sets.

An E1-F interface has the following features:

· In framed mode, an E1-F interface can bind timeslots into only one channel set. In contrast, a CE1 interface can group and bundle timeslots randomly into multiple channel sets.

· An E1-F interface can operate in either framed (the default) or unframed mode.

¡ In unframed mode, an E1-F interface provides 2048 kbps of data bandwidth. For the interface, a synchronous serial interface is created automatically.

¡ In framed mode, an E1-F interface is physically divided into 32 timeslots numbered 0 through 31. Timeslot 0 is used for transmitting synchronization information. All other timeslots can randomly form one channel set. For the channel set, a synchronous serial interface is created automatically. The interface rate is n × 64 kbps, where n is the number of bundled timeslots.

· The synchronous serial interface created in either mode has the same logical features as a standard synchronous serial interface and supports the following protocols:

¡ Data link layer protocols, such as PPP, HDLC, LAPB, and Frame Relay.

¡ Network layer protocols, such as IP.

You can configure this interface in the same way a standard synchronous serial interface is configured.

Configuring an E1-F interface in framed mode

1. Enter system view.

system-view

2. Enter E1-F interface view.

interface serial interface-number

3. Configure the interface to operate in framed mode.

undo fe1 unframed

The default is framed mode.

4. Bundle timeslots on the interface.

fe1 timeslot-list range

By default, if no timeslot range is specified, all timeslots are bundled.

5. Set the framing format.

fe1 frame-format { crc4 | no-crc4 }

The default is no-CRC4.

6. Enable RAI detection on the interface.

fe1 alarm-detect rai

By default, RAI detection is enabled on the interface.

7. Set other interface parameters.

See "Configuring other E1-F interface parameters."

Configuring an E1-F interface in unframed mode

1. Enter system view.

system-view

2. Enter E1-F interface view.

interface serial interface-number

3. Configure the interface to operate in unframed mode.

fe1 unframed

The default is framed mode.

4. Enable AIS detection.

fe1 detect-ais

By default, AIS detection is disabled.

5. Set other interface parameters.

See "Configuring other E1-F interface parameters."

Configuring other E1-F interface parameters

1. Enter system view.

system-view

2. Enter E1-F interface view.

interface serial serial-number

3. Set the line code format.

fe1 code { ami | hdb3 }

The default is HDB3.

4. Enable or disable user data inversion.

fe1 data-coding { inverted | normal }

By default, user data inversion is disabled.

5. Set the clock mode.

fe1 clock { master | slave }

The default is slave, which is line clock.

6. Enable automatic clock mode change.

clock-change auto

By default, automatic clock mode change is disabled.

When automatic clock mode switchover is enabled, the interface automatically switches to the master clock mode when both of the following conditions exist:

¡ The interface uses the slave clock mode.

¡ The interface receives an alarm indication signal (AIS), loss of signal (LOS), or loss of frame (LOF) alarm.

After the alarm is cleared, the interface automatically switches back to the slave clock mode.

7. Set the CRC mode.

crc { 16 | 32 | none }

The default is 16-bit CRC.

8. Configuring interface properties

¡ Set the line idle code type.

fe1 idle-code { 7e | ff }

The default is 0x7E.

¡ Set the cable type.

fe1 cable { long | short }

By default, the cable type is long.

¡ Set the type and the number of interframe filling tags.

fe1 itf { number number | type { 7e | ff } }

By default:

- The type of the interframe filling tag is 0x7E.

- The number of interframe filling tags is four.

Enabling local loopback on an E1-F interface

About this task

Loopback is intended for testing only. Disable loopback when the interface is operating correctly.

Restrictions and guidelines

After you enable this feature on an E1-F interface, the interface does not forward data traffic.

Procedure

1. Enter system view.

system-view

2. Enter E1-F interface view.

interface serial serial-number

3. Enable loopback and set the loopback mode.

fe1 loopback { local | payload | remote }

By default, loopback is disabled.

Display and maintenance commands for E1-F interfaces

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

Task	Command
Display information about E1-F interfaces.	display fe1 [ serial interface-number ]
Display the status of an E1-F interface.	display interface serial interface-number
Clear statistics for E1-F interfaces.	reset counters interface serial [ interface-number ]

‌

Configuring a T1-F interface

About T1-F interfaces

T1-F interfaces, fractional T1 interfaces, are simplified CT1 interfaces. They are a cost-effective alternative to CT1 interfaces for T1 access services that do not require multiple channel sets.

A T1-F interface has the following features:

· In framed mode, a T1-F interface can bind timeslots into only one channel set. In contrast, a CT1 interface can group and bundle timeslots randomly into multiple channel sets.

A T1-F interface can only operate in framed mode. Timeslots 1 through 24 on the interface can randomly form a channel set. For the channel set, the system creates one synchronous serial interface. The interface rate is n × 64 kbps or n × 56 kbps, where n is the number of bundled timeslots. The synchronous serial interface has the same logical features as a standard synchronous serial interface and supports the following protocols:

· Data link layer protocols, such as PPP, HDLC, LAPB, and Frame Relay.

· Network layer protocols, such as IP.

You can configure this interface in the same way a standard synchronous serial interface is configured.

Configuring common T1-F interface settings

Configuring basic settings of a T1-F interface

1. Enter system view.

system-view

2. Enter T1-F interface view.

interface serial interface-number

3. Enable or disable user data inversion.

ft1 data-coding { inverted | normal }

By default, user data inversion is disabled.

4. Set the clock mode.

ft1 clock { master | slave }

The default is slave, which is line clock.

5. Set alarm thresholds.

ft1 alarm-threshold { ais { level-1 | level-2 } | lfa { level-1 | level-2 | level-3 | level-4 } | los { pulse-detection | pulse-recovery } value }

By default:

¡ Both AIS alarm threshold and LFA alarm threshold are level-1.

6. Set the behavior of the interface on the FDL in ESF framing.

ft1 fdl { ansi | att | both | none }

By default, FDL is disabled.

7. Send remote control loopback code.

ft1 sendloopcode { fdl-ansi-llb-down | fdl-ansi-llb-up | fdl-ansi-plb-down | fdl-ansi-plb-up | fdl-att-plb-down | fdl-att-plb-up | inband-llb-down | inband-llb-up }

By default, no remote control code is sent.

Configure T1-F interface properties

1. Enter system view.

system-view

2. Enter T1-F interface view.

interface serial interface-number

3. Bundle timeslots on the interface into a channel set.

ft1 timeslot-list range [ speed { 56k | 64k } ]

By default, if no timeslot range is specified, all timeslots are bundled into one channel set.

The default timeslot speed is 64 kbps, and the default T1-F interface speed is 1536 kbps.

4. Set the cable length and attenuation.

ft1 cable { long decibel | short length }

By default, the long 0db keyword applies.

5. Set the line code format.

ft1 code { ami | b8zs }

The default is B8ZS.

6. Set the framing format.

ft1 frame-format { esf | sf }

The default is esf.

7. Set the type of line idle code.

ft1 idle-code { 7e | ff }

The default is 0x7E.

8. Set the type and the number of interframe filling tags.

ft1 itf { number number | type { 7e | ff } }

By default:

¡ The type of the interframe filling tag is 0x7E.

¡ The number of interframe filling tags is four.

Configure detection for a T1-F interface

1. Enter system view.

system-view

2. Enter T1-F interface view.

interface serial interface-number

3. Enable RAI detection on the interface.

ft1 alarm-detect rai

By default, RAI detection is enabled on the interface.

This command is applicable when the framing format is ESF.

4. Set the CRC mode.

crc { 16 | 32 | none }

The default is 16-bit CRC.

5. Start a BERT test on the T1-F interface.

ft1 bert pattern { 2^20 | 2^15 } time minutes [ unframed ]

By default, no BERT test is performed.

Enabling local loopback on a T1-F interface

About this task

Loopback is intended for testing only. Disable loopback when the interface is operating correctly.

Restrictions and guidelines

After you enable this feature on a T1-F interface, the interface does not forward data traffic.

Procedure

1. Enter system view.

system-view

2. Enter T1-F interface view.

interface serial serial-number

3. Enable loopback and set the loopback mode.

ft1 loopback { local | payload | remote }

By default, loopback is disabled.

Display and maintenance commands for T1-F interfaces

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

Task	Command
Display information about T1-F interfaces.	display ft1 [ serial interface-number ]
Display the status of a T1-F interface.	display interface serial interface-number
Clear statistics for T1-F interfaces.	reset counters interface serial [ interface-number ]

‌

Configuring a CT3 interface

About CT3 interfaces

Both T3 and T1 belong to the T-carrier system promoted by ANSI. T3 uses the digital signal level DS-3 and operates at 44.736 Mbps.

CT3 interfaces support T3 (unchannelized) mode the CT3 (channelized) mode.

T3 mode

In T3 mode, a CT3 interface provides 44.736 Mbps of data bandwidth. No timeslots are divided. The system automatically creates a synchronous serial interface for it. The serial interface name uses the serial number/0:0 format.

The synchronous serial interface created in T3 mode has the same logical features as a standard synchronous serial interface. You can configure this interface in the same way a standard synchronous serial interface is configured.

CT3 mode

In CT3 mode, a CT3 interface can be demultiplexed into 28 channels of T1 signals. Each T1 line can be divided into 24 timeslots numbered 1 through 24. Each line on a T1 interface can operate at either 64 kbps or 56 kbps.

The following are schemes available for creating different rates of T1 lines on a CT3 interface in CT3 mode:

· M × 1.536 Mbps. (M is an integer in the range of 1 to 28.)

· N × 56 kbps or N x 64 kbps. (N is an integer in the range of 1 to 256.)

A T1 line can operate in T1 or CT1 mode.

· If the T1 line operates in unframed (T1) mode, the system automatically creates a 1544 kbps serial interface for it. The serial interface name uses the serial number/line-number:0 format.

· If the T1 line operates in framed (CT1) mode, you can bundle timeslots on it. The system automatically creates a synchronous serial interface for it. The serial interface name uses the serial number/line-number:set-number format. This interface operates at n × 64 kbps or n × 56 kbps, where n is the number of bundled timeslots.

The synchronous serial interface created in CT3 mode has the same logical features as a standard synchronous serial interface. You can configure this interface in the same way a standard synchronous serial interface is configured.

Configuring a CT3 interface in T3 mode

1. Enter system view.

system-view

2. Enter CT3 interface view.

controller t3 interface-number

3. Configure the interface to operate in T3 mode.

using t3

The default operating mode is CT3 mode.

4. Configure the interface to operate in the FT3 mode and set the DSU mode or the subrate, or enable payload scrambling for the interface.

ft3 { dsu-mode { 0 | 1 | 2 | 3 | 4 } | subrate number | scramble }

By default:

¡ DSU mode 0 (the digital link mode) is used.

¡ The subrate is 44210 kbps.

¡ Payload scrambling is disabled.

5. Set the clock mode.

clock { master | slave }

The default clock mode for the CT3 interface is slave, which is line clock.

6. Set the cable length.

cable feet

The default is 14.9 meters (49 feet).

7. Configure alarm signal detection/sending.

alarm { detect | generate { ais | febe | idle | rai } }

By default, alarm signal detection is enabled and alarm signal sending is disabled.

8. Configure FEAC channel signal detection/sending on the CT3 interface.

feac { detect | generate { ds3-los | ds3-ais | ds3-oof | ds3-idle | ds3-eqptfail | loopback { ds3-line | ds3-payload } } }

By default, FEAC channel signal detection is enabled, but no FEAC signals are sent.

9. Configure MDL message detection/sending on the CT3 interface.

mdl { data { eic string | fic string | | gen-no string | lic string | pfi string | port-no string | unit string } | detect | generate { idle-signal | path | test-signal } }

By default, MDL message detection and sending are disabled and the default MDL message information applies.

Configuring a CT3 interface in CT3 mode

Restrictions and guidelines

When you change the interface state during the configuration, make sure you understand the following information:

· Shutting down or bringing up a CT3 interface also shuts down or brings up all its lines and serial interfaces, including:

¡ T1 lines demultiplexed from the CT3 interface.

¡ Serial interfaces created for unframed T1 lines.

¡ Serial interfaces created for channel sets on framed T1 lines.

· Shutting down or bringing up a T1 line also shuts down or brings up the serial interface created for it.

· To shut down or bring up only the serial interface for a T3, unframed T1, or framed T1 channel, use the shutdown or undo shutdown command in serial interface view.

Procedure

1. Enter system view.

system-view

2. Enter CT3 interface view.

controller t3 interface-number

3. Configure the interface to operate in CT3 mode.

using ct3

The default operating mode is CT3 mode.

4. Set the operating mode of a T1 line on the CT3 interface.

¡ Set the operating mode to unframed (T1).

t1 line-number unframed

¡ Execute the following commands in sequence to set the operating mode to framed (CT1) and bundle timeslots.

undo t1 line-number unframed

t1 line-number channel-set set-number timeslot-list range [ speed { 56k | 64k } ]

By default:

¡ A T1 line operates in framed (CT1) mode.

¡ No channel sets exist on a T1 line.

5. Set the clock mode.

¡ Set the clock mode for a CT3 interface.

clock { master | slave }

¡ Set the clock mode for a T1 line on the CT3 interface.

t1 line-number clock { master | slave }

The default clock mode for the CT3 interface is slave.

The default clock mode for the T1 line is slave.

6. Set the cable length.

cable feet

The default is 14.9 meters (49 feet).

7. Set the framing format for the CT3 interface.

frame-format { c-bit | m23 }

By default, the framing format on the CT3 interface is C-bit.

8. Set the framing format for the T1 line.

t1 line-number frame-format { esf | sf }

By default, the framing format on the T1 line is ESF.

9. Place a T1 line on the far-end CT3 interface in a loopback.

t1 line-number sendloopcode { fdl-ansi-line-up | fdl-ansi-payload-up | fdl-att-payload-up | inband-line-up }

By default, no loopback mode is set.

10. Set the FDL format for a T1 channel.

t1 line-number set fdl { ansi | att | both | none }

By default, FDL is disabled.

This operation applies only to T1 channels that are formed on CT3 interfaces, operate in channelized mode, and use ESF as the T1 framing format.

11. Bring up the CT3 interface or a T1 line on the interface.

¡ Bring up the CT3 interface.

undo shutdown

¡ Bring up a T1 line on the CT3 interface.

undo t1 line-number shutdown

By default, all CT3 interfaces and T1 lines are up.

Configure detection for a CT3 interface

1. Enter system view.

system-view

2. Enter CT3 interface view.

controller t3 interface-number

3. Configure alarm signal detection/sending.

¡ On the CT3 interface:

alarm { detect | generate { ais | febe | idle | rai } }

¡ On a T1 line:

t1 line-number alarm { detect | generate { ais | rai } }

4. Configure FEAC channel signal detection/sending on the CT3 interface.

feac { detect | generate { ds3-los | ds3-ais | ds3-oof | ds3-idle | ds3-eqptfail | loopback { ds3-line | ds3-payload } } }

By default, FEAC channel signal detection is enabled, but no FEAC signals are sent.

5. Configure MDL message detection/sending on the CT3 interface.

mdl { data { eic string | fic string | | gen-no string | lic string | pfi string | port-no string | unit string } | detect | generate { idle-signal | path | test-signal } }

By default, MDL message detection and sending are disabled and the default MDL message information applies.

Enabling local loopback on a CT3 interface

About this task

Loopback is intended for testing only. Disable loopback when the interface is operating correctly.

Restrictions and guidelines

After you enable this feature on a CT3 interface, the interface does not forward data traffic.

Procedure

1. Enter system view.

system-view

2. Enter CT3 interface view.

controller t3 interface-number

3. Set the loopback mode.

¡ On the CT3 interface:

loopback { local | payload | remote }

¡ On a T1 line:

t1 line-number loopback { local | payload | remote }

By default, loopback is disabled.

Display and maintenance commands for CT3 interfaces

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

Task	Command
Display CT3 interface information.	display controller [ t3 [ interface-number ] [ t1 line-number ] ]
Display the configuration and state of a serial interface formed on a CT3 interface.	display interface serial interface-number
Display the state of a T1 line.	t1 line-number show
Clear statistics for CT3 interfaces.	reset counters controller t3 [ interface-number ]

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Restoring the default settings for an interface

Restrictions and guidelines

This feature might interrupt ongoing network services. Make sure you are fully aware of the impact of this feature when you use it on a live network.

This feature might fail to restore the default settings for some commands because of command dependencies or system restrictions. You can use the display this command in interface view to check for these commands and perform their undo forms or follow the command reference to restore their default settings. If your restoration attempt still fails, follow the error message to resolve the problem.

Procedure

1. Enter system view.

system-view

2. Enter interface view.

interface interface-type interface-number

3. Restore the default settings for the interface.

default

03-Interface Configuration Guide

Configuring WAN interfaces

Configuring common WAN interface settings

About this task

Procedure

Configuring a synchronous serial interface

About this task

Procedure

About this task

Restrictions and guidelines

Procedure

Enabling subinterface rate statistics collection on a serial interface

About this task

Restrictions and guidelines

Procedure

About CE1 interfaces

E1 mode

CE1 mode

Configuring a CE1 interface in E1 mode

Configuring a CE1 interface in CE1 mode

Configuring other CE1 interface parameters

About this task

Restrictions and guidelines

Procedure

Configuring a CT1 interface

CT1 mode

Configuring other CT1 interface parameters

Configuring common settings

Configuring interface properties

Configuring detection for a CT1/PRI interface

About this task

Restrictions and guidelines

Procedure

Configuring an E1-F interface

Configuring an E1-F interface in framed mode

Configuring other E1-F interface parameters

About this task

Restrictions and guidelines

Procedure

Display and maintenance commands for E1-F interfaces

Configuring a T1-F interface

Configuring basic settings of a T1-F interface

Configure T1-F interface properties

Configure detection for a T1-F interface

About this task

Restrictions and guidelines

Procedure

Display and maintenance commands for T1-F interfaces

Configuring a CT3 interface

About CT3 interfaces

T3 mode

CT3 mode

Configuring a CT3 interface in T3 mode

Restrictions and guidelines

Procedure

Configure detection for a CT3 interface

About this task

Restrictions and guidelines

Procedure

Display and maintenance commands for CT3 interfaces

Restrictions and guidelines

Procedure

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