Contents

Configuring WAN interfaces· 1

About WAN interfaces· 1

WAN interface and hardware compatibility· 1

Configuring common WAN interface settings· 1

Configuring a serial interface· 2

About serial interfaces· 2

Restrictions: Hardware compatibility with serial interfaces· 2

Configuring a synchronous serial interface· 2

Verifying and maintaining serial interfaces· 3

Configuring an E1-F interface· 3

About E1-F interfaces· 3

Restrictions: Hardware compatibility with E1-F interfaces· 4

Configuring an E1-F interface in framed mode· 4

Configuring an E1-F interface in unframed mode· 4

Configuring other E1-F interface parameters· 5

Enabling local loopback on an E1-F interface· 6

Verifying and maintaining E1-F interfaces· 6

Restoring the default settings for an interface· 6

Configuring WAN interfaces

About WAN interfaces

This chapter describes how to configure the following types of WAN interfaces:

·     Synchronous serial interface.

·     E1-F interface.

WAN interface and hardware compatibility

This feature is supported on devices installed with SIC-2E1-F or SIC-E1-F cards. For interfaces provided by a device, see the install guide and card manuals.

Configuring common WAN interface settings

About this task

This section only describes the common properties configuration for WAN interfaces.

Procedure

1.     Enter system view.

system-view

¡     Enter synchronous serial/E1-F interface view.

interface serial interface-number

2.     Configure the interface description.

description text

By default, the description of an asynchronous serial interface is interface name Interface, for example, Serial2/1 Interface.

3.     Set the expected bandwidth for the interface.

bandwidth bandwidth-value

By default, the expected bandwidth (in kbps) is the interface baud rate divided by 1000.

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 and E1-F interfaces.

4.     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 and E1-F interfaces.

5.     Set the MTU.

mtu size

The default setting is 1500 bytes.

Interfaces that support this feature include serial interfaces and E1-F interfaces.

6.     Bring up the interface.

undo shutdown

By default, an interface is up.

Configuring a serial interface

About serial interfaces

Synchronous serial interfaces on this device refer to logical interfaces channelized from E1-F interfaces. They have the same properties as synchronous serial interfaces and can be configured in the same way as synchronous serial interfaces are configured.

Restrictions: Hardware compatibility with serial interfaces

Models	Serial interface compatibility
MSR1008	No
MSR2630E-X1	Yes
MSR3610E-X1, MSR3610E-X1-DP	·     MSR3610E-X1: Yes ·     MSR3610E-X1-DP: No

‌

Models	Serial interface compatibility
MSR2660-XS	No
MSR2680-XS	No

‌

Models	Serial interface compatibility
MSR2600-12X-WiNet	No
MSR2610-13X-WiNet	No

‌

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 PPP, IP address, and interface backup.

Procedure

1.     Enter system view.

system-view

2.     Enter synchronous serial interface view.

interface serial interface-number

3.     Set the link layer protocol.

link-protocol { hdlc | ppp }

The default is PPP.

4.     Configure line detection settings.

¡     Set the CRC mode.

crc { 16 | 32 | none }

The default is 16-bit CRC.

¡     Initiate a loopback test.

loopback-test [ -c count | -p { pattern | special { ascending | descending | random } } | -s packetsize | -t timeout ] * interface interface-type interface-number

By default, no loopback test is performed on an interface.

This command is available only on synchronous serial interfaces that are created for E1-F interfaces.

Verifying and maintaining serial interfaces

Clearing serial interface statistics

Perform all clear tasks in user view.

·     Clear statistics for serial interfaces.

reset counters interface serial [ interface-number ]

Displaying serial interface information

Perform all display tasks in any view.

·     Display serial interface information.

display interface serial [ interface-number ] [ brief [ description | down ] ]

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.

·     An E1-F interface does not support PRI mode.

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, and LAPB.

·     Network layer protocols, such as IP.

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

Restrictions: Hardware compatibility with E1-F interfaces

Models	E1-F interface compatibility
MSR1008	No
MSR2630E-X1	Yes
MSR3610E-X1, MSR3610E-X1-DP	·     MSR3610E-X1: Yes ·     MSR3610E-X1-DP: No

‌

Models	E1-F interface compatibility
MSR2660-XS	No
MSR2680-XS	No

‌

Models	E1-F interface compatibility
MSR2600-12X-WiNet	No
MSR2610-13X-WiNet	No

‌

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 cable impedance.

fe1 cable-type { 75 | 120 }

The default is 75 ohm.

¡     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.

Verifying and maintaining E1-F interfaces

Clearing statistics for E1-F interfaces

To clear statistics for E1-F interfaces, execute the following command in user view:

reset counters interface serial [ interface-number ]

Displaying E1-F interface information

Perform all display tasks in any view.

·     Display information about E1-F interfaces.

display fe1 [ serial interface-number ]

·     Display the operating status of an E1-F interface.

display interface serial interface-number

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