Cisco ASR 920 Router Series Configuration Guide, Cisco IOS XE 16

Limitations and Restrictions

SDH framing mode is supported; SONET framing is supported beginning in Cisco IOS XE Release 3.8.
On the OC-3 controller, framing mode is applicable on the interface module and per port. When framing mode is set to SONET, all the 4 ports on the interface module are enabled for SONET mode. Similarly, when framing mode is set to SDH mode, all 4 ports on the interface module are enabled for SDH mode.
The OC-3 controller supports Asynchronous mode at the V5 byte level for Plesiochronous Digital Hierarchy (PDH). This value cannot be modified. If a mismatch occurs between the V5 byte, and the peer (remote router), loss of frames may be observed at the PDH level.
HDLC, PPP, and MLPPP encapsulation are supported. In POS mode, HDLC and PPP are supported.
ATM Layer 2 AAL0 and AAL5 encapsulation types are supported.
E1 unframed encapsulation is not supported except using SAToP pseudowire interfaces.
Unframed T1 is supported only for SATOP. E1 unframed is supported.
MPLS-TP is not supported over Packet Over Sonet (POS) interfaces.
Multicast is not supported on OC-12 interfaces.
QoS is supported using MLPPP interfaces and egress POS interfaces.
MPLS is supported only on PoS interfaces; MPLS on T1/E1 MLP is supported starting with Cisco IOS XE Release 3.9. MPLS over MLP is also supported.
Channelization is not supported for serial interfaces. However, Channelization is supported for CEM at the DS0 level.
DS3 Clear channel is supported only on CEM.
BERT is not supported on DS0 and DS1 CEM. It is supported only on DS3 CEM mode.
Configurations on the interface module must be completely removed before moving the interface module to a different slot on the router.
Mixed configurations of features are not supported on the same port. For example, one OC-3 port can have only CEM (CESoP or SAToP) or ATM or IMA or DS3 configurations, but not a combination of these features on a single port.
CEM is not supported across OC12/ STM-4 interface module. CEM is supported on all four ports of OC-3/STM-1 interface module.
If two CEM circuits are configured under the same OC-3 interface module, the circuits should not be confiugred with the same circuit-id. If two CEM cirsuits are configured on different OC-3 inteface modules, then both circuits can be configured with the same circuit-id.
By default, AIS-SHUT is enabled on the OC-3 SONET/SDH controller and port level shut down of SONET/SDH controller results in AIS alarm on peer node. To enable the LOS alarm on controller shut down, you must configure “no ais-shut” at SONET/SDH controller level.
Maximum channels per OC-3/ STM interface module for T1 interfaces is 336 for RSP1 and RSP2.
Maximum channels per OC-3/STM interface module for E1 interfaces is 252 for RSP1 and RSP2.

Managing Interface Naming

The following sections describe how to manage interface naming on the ASR 920 Series Routers.

Identifying Slots and Subslot

To specify the physical address for controller or interface configuration, use the interface and controller sonet commands, where:

slot—Specifies the chassis slot number where the interface module is installed; the slot number is always 0 for interface modules on the .ASR 920 Series Router.
subslot—Specifies the subslot where the interface module is installed.
port—Specifies the SONET port number.

For example, if the optical interface module is installed in slot 0 of the chassis, the controller configuration address is specified as controller sonet 0/1/0 .

For channelized configuration, the interface address format is: slot/subslot/port:channel-group, where:

channel-group—Specifies the logical channel group assigned to the time slots within the T1 link.

Setting the Card Type

The interface module is not functional until the card type is set. Information about the interface module is not indicated in the output of any show commands until the card type has been set. There is no default card type.

To set the card type for the OC-3/OC-12 interface module, complete these steps:

Procedure

Step 1

configure terminal

Example:


Router# configure terminal

Enters global configuration mode.

Step 2

card type {OC3 | OC12 } slot bay

Example:


Router(config)# card type OC12 0 1

Sets the mode for the interface module:

OC3—Specifies one OC-3 /STM-1 port.
OC12—Specifies one OC-12/STM-4 port.
slot bay —Specifies the location of the interface module.

Step 3

exit

Example:


Router(config)# exit

Exits configuration mode and returns to the EXEC command interpreter prompt.

Configuring the Controller

Starting with Cisco IOS XE Release 3.10, OC-3 and OC-12 is licensed. For information on licensing these interfaces, see Licensing the OC-3 and OC-12 Interface Modules .

Note

When the mode is changed, the interface module reloads.


Command	Purpose
controller sonet slot/ subslot/ port `Router(config)# controller sonet 0/1/3`	Selects the controller to configure and enters controller configuration mode, where: slot/ subslot/ port —Specifies the location of the interface.

Configuring SDH

The following sections describe how to configure SDH on the optical interface module:

Configuring SDH Mode

SDH T1 Mode

To configure SDH T1 mode, complete the following steps:

Procedure

Command or Action Purpose

Step 1

framing sdh

Example:


Router(config-controller)# framing sdh

Specifies SDH as the frame type.

Step 2

aug mapping {au-4 }

Example:


Router(config-controller)# aug  mapping  au-4

Configures AUG mapping for SDH framing.

Step 3

clock source {internal | line }

Example:


Router(config-controller)# clock source line

Sets the clock source, where:

internal—Specifies that the internal clock source is used.
line—Specifies that the network clock source is used. This is the default for T1 and E1.

Step 4

au-4 au-4# tug-3 tug-3#

Example:


Router(config-controller)# au-4  1 tug-3  3

Configures AU-4, and tributary unit groups, type 3 (TUG-3) for AU-4 and enters specific configuration mode.

au-4# —Range is from 1 to 4 for OC-12 mode and 1 for OC-3 mode
tug-3# —Range is from 1 to 3.

Step 5

In SDH framing in AU-4 mode:

Example:

mode {c-11 | c-12 | t3 | e3}

Example:


Router(config-ctrlr-tug3)# mode  {c-11 | c-12  | t3  | e3 }

(Optional) Configures mode of operation for AU-3 or AU-4 mode, where:

C-11 and C-12 are container level-n (SDH) channelized T3s. They are types of T3 channels that are subdivided into 28 T1 channels.

c-11 —Specifies an AU-3/AU-4 TUG-3 divided into seven TUG-2s. Each TUG-2 is then divided into four TU11s, each carrying a C-11 T1.
c-12 —Specifies an AU-3/AU-4 TUG-3 divided into seven TUG-2. Each TUG-2 is then divided into three TU12s, each carrying a C-12 E1.
t3 —Specifies an AU-3/AU-4 TUG-3 carrying an unchannelized (clear channel) T3.
e3 —Specifies an AU-3/AU-4 TUG-3 carrying an unchannelized (clear channel) E3.

Note

Only c-11 and c-12 are currently supported.

Step 6

SAToP CEM Group

Example:

tug-2  1 e1 1 cem-group 1 u nframed

Example:


Router(config-ctrlr-tug3)# tug-2  1  e1 1 cem-group 1 unframed

Example:

CESoPSN CEM Group

tug-2 1 e1 1 cem-group 1 timeslots 1-31

Example:


Router(config-ctrlr-tug3)# tug-2 1 e1 1 cem-group 1 timeslots 1-31

Example:

IMA Group

tug-2 1 e1 1 ima-group 1

Example:


Router(config-ctrlr-tug3)# tug-2 1 e1 1 ima-group 1

Example:

Channel Group

tug-2 1 e1 1 [[channel-group  channel-group-number] [ timeslots  list-of-timeslots]]

Example:


Router(config-ctrlr-tug3)# tug-2  1  e1  1  channel-group   1  timeslots  1-31]

Creates a CEM group, IMA group, or channel-group for the AU-3 or AU-4. Valid values are:

e1— 1–3
tug-3—1-3
tug-2 —1–7
unframed —Specifies that a single CEM channel is being created including all time slots and the framing structure of the line.

Step 7

exit

Example:


Router(config-controller)# exit

Exits controller configuration mode.

Step 8

controller t1 interface-path-id

Example:


Router(config-controller)# controller t1 0/1/1/0/0/0

Enters controller configuration mode for an individual T1 or E1.

Step 9

Creates a CEM group, IMA group, or channel-group on the T1 or E1 controller.

SAToP CEM Group


Router(config-ctrlr)# t1 cem-group  1 unframed

CESoPSN CEM Group


Router(config-ctrlr)# t1 cem-group  1 timeslots 1-24

Clear-Channel ATM


Router(config-ctrlr-tug3)# e1  1  atm

IMA Group


Router(config-ctrlr-tug3)# e1  1  ima-group  1

Channel Group


Router(config-ctrlr)# t1  2 channel-group  4 [[ channel-group  channel-group-number] [ timeslots  list-of-timeslots]]

What to do next

Example

The example configures SDH E1 mode:


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-4
Router(config-controller)# clock source internal
Router(config-controller)# au-4 1 tug-3 2
Router(config-ctrlr-tug3)# tug-2 1 e1 1 channel-group 1 timeslots 1-31

SDH T1 Mode

To configure SDH T1 mode, complete the following steps:

Procedure

Command or Action Purpose

Step 1

framing sdh

Example:


Router(config-controller)# framing sdh

Specifies SDH as the frame type.

Step 2

aug mapping {au-3 }

Example:


Router(config-controller)# aug  mapping  au-3

Configures AUG mapping for SDH framing.

Supports au-3 and au-4 aug mapping. The default setting is au-3.

Step 3

clock source {internal | line }

Example:


Router(config-controller)# clock source line

Sets the clock source, where:

internal—Specifies that the internal clock source is used.
l
ine—Specifies that the network clock source is used. This is the default for T1 and E1.

Step 4

au-3 au-3#

Example:


Router(config-controller)# au-3  au-3#

Configures AU-3, and enters specific configuration mode.

au-3# —Range is from 1 to 12 for OC-12 mode. For OC-3 mode, the value is 1–3.

Step 5

In SDH framing in AU-3 mode:

Example:

mode {c-11 | c-12 | t3 | e3}

Example:


Router(config-ctrlr-au3)# mode  {c-11 | c-12 | t3 | e3}

(Optional) Configures mode of operation for AU-3 or AU-4 mode, where:

C-11 and C-12 are container level-n (SDH) channelized T3s. They are types of T3 channels that are subdivided into 28 T1 channels.

c-11 —Specifies an AU-3/AU-4 TUG-3 divided into seven TUG-2s. Each TUG-2 is then divided into four TU11s, each carrying a C-11 T1.
c-12 —Specifies an AU-3/AU-4 TUG-3 divided into seven TUG-2. Each TUG-2 is then divided into three TU12s, each carrying a C-12 E1.
t3 —Specifies an AU-3/AU-4 TUG-3 carrying an unchannelized (clear channel) T3.
e3 —Specifies an AU-3/AU-4 TUG-3 carrying an unchannelized (clear channel) E3.

Note

Only c-11 and c-12 are currently supported.

Step 6

SAToP CEM Group

Example:

tug-2  1 t1  1 cem-group  1 unframed

Example:


Router(config-ctrlr-au3)# tug-2  1  t1  1 cem-group  1 unframed

Example:

CESoPSN CEM Group

Example:

tug-2 1 e1 1 cem-group 1 timeslots 1-31

Example:


Router(config-ctrlr-au3)# tug-2 1 t1 1 cem-group 1 timeslots 1-31

Example:

IMA Group

tug-2  1 t1 1 ima-group 1

Example:


Router(config-ctrlr-au3)# tug-2 1 t1 1 ima-group 1

Example:

Channel Group

tug-2 1 e1 1  [[channel-group  channel-group-number] [ timeslots  list-of-timeslots]]

Example:


Router(config-ctrlr-tug3)# tug-2  1  t1  1  channel-group  0  timeslots   1-31

Creates a CEM group, IMA group, or channel-group for the AU-3 or AU-4. Valid values are:

t1 —Range is from 1 to 12 for OC-12 mode. For OC-3 mode, the value is 1–3.
tug-2 —1–7
unframed —Specifies that a single CEM channel is being created including all time slots and the framing structure of the line.

Step 7

exit

Example:


Router(config-controller)# exit

Exits controller configuration mode.

Step 8

controller t1 interface-path-id

Example:


Router(config-controller)# controller t1 0/1/1/0/0/0

Enters controller configuration mode for an individual T1 or E1.

Step 9

Creates a CEM group, IMA group, or channel-group on the T1 or E1 controller.

SAToP CEM Group


Router(config-ctrlr)# t1 cem-group  1 unframed

CESoPSN CEM Group


Router(config-ctrlr)# t1 cem-group  1 timeslots 1-24

Clear-Channel ATM


Router(config-ctrlr-tug3)# e1  1  atm

IMA Group


Router(config-ctrlr-tug3)# e1  1  ima-group  1

Channel Group


Router(config-ctrlr)# t1  2 channel-group  4 [[ channel-group  channel-group-number] [ timeslots  list-of-timeslots]]

What to do next

The example configures SDH T1 mode:


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-3
Router(config-controller)# au-3 1 
Router(config-ctrlr-au3)# tug-2 1 t1 1 channel-group 1 timeslots 1-31

For information about configuring optional features, see Optional Configurations.

Configuring SDH in POS Mode

Follow these steps to configure SDH in POS mode on the optical interface module.

Procedure

Command or Action Purpose

Step 1

controller sonet slot/ subslot/ port

Example:


Router(config)# controller sonet  0/1/0

Selects the controller to be configured.

Step 2

framing {sonet | sdh}

Example:


Router(config)# framing sdh

Specifies SDH as the framing mode.

Note

The interface module reloads if the framing is changed.

Step 3

aug mapping {au-3 | au-4 }

Example:


Router(config-controller)# aug mapping  au-4

Specifies AUG mapping.

Note

POS mode is only supported with AU-4 mode.

Step 4

au-4 au-4-number pos

Example:


Router(config-controller)# au-4 1 pos

Selects the AU-4 to be configured in POS mode with SDH framing. The command creates a POS interface, such as POS0/1/0:1. In OC-3 mode, the value is 1; in OC-12 mode, valid values are 1-4.

Step 5

end

Example:


Router(config-controller)# end

Exits configuration mode.

Configuring SONET Mode

The following sections describe how to configure SONET mode on the optical interface module:

Configuring SONET Mode

To configure an interface module to use SONET mode:

Procedure

Command or Action Purpose

Step 1

controller sonet slot /subslot /port

Example:


Router(config)# controller sonet  0/1/0

Selects the controller to be configured.

Step 2

framing {sonet | sdh}

Example:


Router(config-controller)# framing sonet

Specifies SONET as the framing mode.

Step 3

clock source {line | internal }

Example:


Router(config-if)# clock source line

Specifies the clock source for the POS link, where:

line —The link uses the recovered clock from the line. This is the default setting.
internal —The link uses the internal clock source.

Step 4

sts-1 {1 - 12 | 1 - 3 | 4 - 6 | 7 - 9 | 10 - 12}

Example:


Router(config-controller)# sts-1 1 - 3

Specifies the SONET Synchronous Transport Signal (STS) level and enters STS-1 configuration mode. The starting-number and ending-number arguments indicate the starting and ending STS value of the interface.

For OC-3 interfaces, this value is 1.

Note

The 1-12 value is supported only in OC-12 mode.

Step 5

vtg vtg-number t1 t1-line-number channel-group channel-group-no timeslots list-of-timeslots

Example:


Router(config-if)# vtg 1 t1 1 channel-group 0 timesolts 1-24

Configures the T1 on the VTG, where

vtg-number —Specifies the VTG number. The framing is1-7
t1 t1-line-number —1-4
channel-group channel-group-no —0-24
timeslots list-of-timeslots —1-24

Step 6

end

Example:


Router(config-if)# end

Exits configuration mode.

What to do next

The below example shows the configuration for the DS1 T1 serial interface:


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sonet
Router(config-controller)# clock source line
Router(config-controller)# sts-1 1 - 3
Router(config-ctrlr-sts1)# vtg 1 t1 1 channel-group 0 timeslot 1-24
Router(config-controller)# end

For information on optional SONET configurations, see Optional Configurations. For information on optional ATM, IMA, POS and Serial interface configuration, see Optional Configurations.

Configuring SONET Mode

Example


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-4
Router(config-controller)# au-4 1 pos
Router(config-controller)# end

For information about configuring optional features, see Optional Packet over SONET Configurations

Configuring SONET POS Mode

To configure an interface module to use SONET in POS mode, perform the following procedure.

Procedure

Command or Action Purpose

Step 1

controller sonet slot /subslot /port

Example:


Router(config)# controller sonet  0/1/0

Selects the controller to be configured.

Step 2

framing {sonet | sdh}

Example:


Router(config-controller)# framing sonet

Specifies SONET as the framing mode.

Step 3

clock source {line | internal }

Example:


Router(config-controller)# clock source line

Specifies the clock source for the POS link, where:

line —The link uses the recovered clock from the line. This is the default setting.
internal —The link uses the internal clock source.

Step 4

sts-1 {1- 12 | 1 - 3 | 4 - 6 | 7 - 9 | 10 - 12} pos

Example:


Router(config-controller)# sts-1 1 - 3 pos

Specifies POS mode; starting-number and ending-number arguments indicate the starting and ending STS value of the POS interface. For OC-3 interfaces, this value is 1.

Note

The 1-12 value is supported only in OC-12 mode.

Step 5

exit

Example:


Router(config-controller# exit

Exits controller configuration mode.

Step 6

Do one of the following:

interface POS slot /subslot /port
interface POS slot /subslot /port.POS-interface
interface POS slot /subslot /port:POS-interface

Example:


interface 0/1/1

Example:


interface 0/1/1.1

Example:


interface 0/1/1:1

Use any of the following commands to access the POS interface.

Step 7

encapsulation encapsulation-type { hdlc | ppp }

Example:


Router(config-if)# encapsulation hdlc

Configures encapsulation; you can configure the following options:

hdlc —Serial HDLC. This is the default for synchronous serial interfaces.
ppp —Point-to-Point Protocol (for serial interface).

Step 8

end

Example:


Router(config-if)# end

Exits configuration mode.

What to do next

Example


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sonet
Router(config-controller)# clock source line
Router(config-controller)# sts-1 1 - 3 pos
Router(config-controller)# exit
Router(config)# interface 0/1/1
Router(config-if)# encapsulation hdlc
Router(config-if)# end

For information on optional SONET configurations, see Configuring SONET POS Mode.

Configuring a CEM group

Configuring CEM Group in SONET Mode

To configure a T1 CEM group in SONET mode:

Procedure

Command or Action Purpose

Step 1

enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

configure terminal

Enters global configuration mode.

Step 3

controller sonet slot/bay/port

Example:


Router(config)# controller sonet 0/1/1

Selects the controller to configure and enters controller configuration mode, where:

slot/bay/port —Specifies the location of the interface.

Note

The slot number is always 1 and the bay number is always 0.

Step 4

framing {sonet | sdh}

Example:


Router(config)# framing sonet

Specifies SONET as the framing mode.

Step 5

sts-1 {1 - 12 | 1 - 3 | 4 - 6 | 7 - 9 | 10 - 12}

Example:


Router(config-controller)# sts-1 1 - 3

Specifies the SONET Synchronous Transport Signal (STS) level and enters STS-1 configuration mode. The starting-number and ending-number arguments indicate the starting and ending STS value of the interface.

For OC-3 interfaces, this value is 1.

Note

The 1-12 value is supported only in OC-12 mode.

Step 6

mode {t3 | vt-15}

Example:


Router(config-ctrlr-sts1-3)# mode t3

Specifies the mode of operation of an STS-1 path, where:

Note

Note VT-15 is the only supported mode.

t3 —DS3 clear channel mode. STS-1carries an unchannelized (clear channel) T3.
vt-15 —A STS-1 is divided into seven Virtual Tributary Groups (VTG). Each VTG is then divided into four VT1.5's, each carrying a T1.

Step 7

SATOP CEM

Example:

cem-group  channel-number  unframed

Example:


Router(config-ctrlr-sts1-3)# cem-group 0 unframed

Example:

CeSOP CEM


vtg vtg_number  t1  t1_line_number  cem-group  channel-number  timeslots  list-of-timesolts

Example:


Router(config-ctrlr-sts1-3)# vtg 1 t1 1 cem-group 1 timeslots 1-10

Configures the T1 on the VTG, where:

vtg_number —Specifies the VTG number. For SONET framing, values are 1 to 7.
t1_line_number —Specifies the T1 line number. Valid range is 1 to 4.
channel-number —Specifies the channel number. Valid range is 0 to 2015.
list-of-timeslots —Specifies the list of timeslots. Valid range is from 1 to 24.

Step 8

end

Exits controller configuration mode and returns to privileged EXEC mode.

What to do next

Example

The example shows a CEM interface configuration:


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sonet
Router(config-controller)# sts-1 1 
Router(config-ctrlr-sts1)# vtg 1 t1 1 cem-group 1 timeslots 1-10
Router(config-ctrlr-sts1)# exit

Configuring CEM Group in SDH Mode

To configure CEM group in SDH mode:

Procedure

Command or Action Purpose

Step 1

enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

configure terminal

Enters global configuration mode.

Step 3

controller sonet slot/bay/port

Example:


Router(config)# controller sonet 0/1/0

Selects the controller to configure and enters controller configuration mode, where:

slot/bay/port —Specifies the location of the interface.

Note

The slot number is always 1 and the bay number is always 0.

Step 4

framing {sonet | sdh}

Example:


Router(config-controller)# framing sdh

Specifies SDH as the framing mode.

Step 5

au-4 au-4# tug-3 tug-3#

Example:


Router(config-controller)# au-4 1 tug-3 1

Configures AU-4, and tributary unit groups, type 3 (TUG-3) for AU-4 and enters specific configuration mode.

In SDH framing mode, each TUG-3, and AU-4 can be configured with one of these commands.

Depending on currently configured AUG mapping setting, this command further specifies TUG-3, or AU-4 muxing. The CLI command parser enters into config-ctrlr-tug3 (SDH mode) or config-ctrlr-au3 (SDH mode), which makes only relevant commands visible.

au-4#—Range is from 1 to 4. For OC-3 mode, the value is 1.

Note

DS3 configuration is supported only on AuU-4.

tug-3#—Range is from 1 to 3.

Note

T1 can only be configured in au-3 mode, E1 can only be configured in the au-4 mode.

Step 6

mode {t3 | e3}

Example:


Router(config-ctrlr-tug3)# mode e3

Specifies the mode of operation.

t3 —Specifies an unchannelized (clear channel) T3.
e3 —Specifies a AU-3 or C3 that carries a unchannelized (DS3 clear channel) E3.

Note

Only e3 mode is supported for SDH framing.

Step 7

cem-group group-number {unframed }

Example:


Router(config-ctrlr-tug3)# cem-group 4 unframed

Creates a CEM group.

unframed —Specifies that a single CEM channel is being created including all time slots and the framing structure of the line.

Step 8

end

Example:


Router(config-ctrlr-tug3)# end

Exits controller configuration mode and returns to privileged EXEC mode.

What to do next

Example


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sdh
Router(config-controller)# au-4 1 tug-3 1
Router(config-ctrlr-tug3)# mode e3
Router(config-ctrlr-tug3)# cem-group 4 unframed
Router(config-ctrlr-tug3)# end

Configuring DS3 Clear Channel on OC-3 and OC-12 Interface Module

Note

DS3 clear channel is supported only on CEM.

Configuring DS3 Clear Channel in SONET Mode

To configure DS3 clear channel in SONET mode:

Procedure

Command or Action Purpose

Step 1

enable

Example:


enable

Enables privileged EXEC mode.

Enter your password if prompted

Step 2

configure terminal

Example:


Router(config)# configure terminal

Enters global configuration mode.

Step 3

controller sonet slot/bay/port

Example:


Router(config)# controller sonet 0/1/1

Selects the controller to configure and enters controller configuration mode, where:

slot/bay/port —Specifies the location of the interface.

Note

The slot number is always 1 and the bay number is always 0.

Step 4

framing {sonet | sdh}

Example:


Router(config)# framing sonet

Specifies SONET as the framing mode.

Step 5

clock source {line | internal }

Example:


Router(config-if)# clock source internal

Specifies the clock source for the POS link, where:

line —The link uses the recovered clock from the line. This is the default setting.
internal —The link uses the internal clock source.

Step 6

sts-1 {1 - 12 | 1 - 3 | 4 - 6 | 7 - 9 | 10 - 12}

Example:


Router(config-controller)# sts-1 1

Specifies the SONET Synchronous Transport Signal (STS) level and enters STS-1 configuration mode. The starting-number and ending-number arguments indicate the starting and ending STS value of the interface.

For OC-3 interfaces, this value is 1.

The 1-12 value is supported only in OC-12 mode.

Step 7

mode {t3 | vt-15}

Example:


Router(config-ctrlr-sts1)# mode t3

Specifies the mode of operation of an STS-1 path, where:

t3 —DS3 clear channel mode. STS-1 carries an unchannelized (clear channel) T3.
vt-15 —A STS-1 is divided into seven Virtual Tributary Groups (VTG). Each VTG is then divided into four VT1.5's, each carrying a T1.

Step 8

cem-group channel-number {unframed}

Example:


Router(config-ctrlr-sts1)# cem-group 4 unframed

Creates a CEM group.

unframed —Specifies that a single CEM channel is being created including all time slots and the framing structure of the line.

Step 9

end

Exits controller configuration mode and returns to privileged EXEC mode.

What to do next

Example

The below example shows the configuration for a DS3 interface:


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sonet
Router(config-controller)# clock source line
Router(config-controller)# sts-1 1 - 3
Router(config-ctrlr-sts1)# mode t3
Router(config-ctrlr-sts1)# cem-group 0 unframed
Router(config-controller)# end

Configuration Example


controller SONET 0/1/0
framing sonet
clock source internal
!
sts-1 1
mode t3
cem-group 0 unframed
!
sts-1 2
mode t3
cem-group 1 unframed
!
sts-1 3
mode t3
cem-group 2 unframed
interface CEM0/1/0
no ip address
cem 0
xconnect 2.2.2.2 501 encapsulation mpls
!
cem 1
xconnect 2.2.2.2 502 encapsulation mpls
!
cem 2
xconnect 2.2.2.2 503 encapsulation mpls
!

Configuring DS3 Clear Channel in SDH Mode

To configure DS3 clear channel in SDH mode:

Procedure

Command or Action Purpose

Step 1

enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

configure terminal

Enters global configuration mode.

Step 3

controller sonet slot/bay/port

Example:


Router(config)# controller sdh 0/1/0

Selects the controller to configure and enters controller configuration mode, where:

slot/bay/port —Specifies the location of the interface.

Note

The slot number is always 1 and the bay number is always 0.

Step 4

framing {sonet | sdh}

Example:


Router(config-controller)# framing sdh

Specifies SDH as the framing mode.

Step 5

clock source {line | internal }

Example:


Router(config-controller)# clock source line

Specifies the clock source for the POS link, where:

line —The link uses the recovered clock from the line. This is the default setting.
internal —The link uses the internal clock source.

Step 6

aug mapping au-4

Example:


Router(config-controller)# aug mapping au-4

Configures AUG mapping for SDH framing.

If the AUG mapping is configured to be AU-4, then the following muxing, alignment, and mapping will be used:

TUG-3 <--> VC-4 <--> AU-4 <--> AUG.

Step 7

au-4 au-4# tug-3 tug-3#

Example:


Router(config-controller)# au-4 1 tug-3 1

Configures AU-4, and tributary unit groups, type 3 (TUG-3) for AU-4 and enters specific configuration mode.

In SDH framing mode TUG-3, and AU-4 can be configured with one of these commands.

Depending on currently configured AUG mapping setting, this command further specifies TUG-3, or AU-4 muxing. The CLI command parser enters into config-ctrlr-tug3 (SDH mode) or config-ctrlr-au3 (SDH mode), which makes only relevant commands visible.

au-4#—Range is from 1 to 4. For OC-3 mode, the value is 1.
tug-3#—Range is from 1 to 3.

Note

E1 can only be configured in the AU-4 mode.

Step 8

mode e3

Example:


Router(config-ctrlr-au4)# mode e3

Specifies the mode of operation.

e3 —Specifies a C3 that carries a unchannelized (DS3 clear channel) E3.

Step 9

cem-group channel-number {unframed }

Example:


Router(config-ctrlr-au4)# cem-group 4 unframed

Creates a CEM group.

unframed —Specifies that a single CEM channel is being created including all time slots and the framing structure of the line.

Step 10

end

Exits controller configuration mode and returns to privileged EXEC mode.

What to do next

Example


Router# configure terminal
Router(config)# controller sonet 0/1/0
Router(config-controller)# framing sdh
Router(config-controller)# clock source line
Router(config-controller)# aug mapping au-4
Router(config-controller)# au-4 1 tug-3 1
Router(config-ctrlr-au4)# mode e3
Router(config-ctrlr-au4)# cem-group 4 unframed
Router(config-ctrlr-au4)# end

Optional Configurations

There are several standard, but optional, configurations that might be necessary to complete the configuration of your interface module.

Configuring the National Bit

When G.751 framing is used, bit 11 of the G.751 frame is reserved for national use and is set to 1 by default.

Note

Configure national bit 1 only when required for interoperability with your telephone company.

To set the national bit in the G.751 frame, use the following commands:

Command

Purpose

Router# configure terminal

Enters global configuration mode.

Router(config)# controller {t1 | e1} slot/subslot/port

Selects the controller to configure.

t1—Specifies the T1 controller.
e1—Specifies the E1 controller.
slot/subslot/port—Specifies the location of the controller.

Router(config-controller)# national reserve {0 | 1} {0 | 1} {0 | 1} {0 | 1} {0 | 1} {0 | 1}

Sets the national bit (the first bit):

0—Sets the international bit in the G.704 frame to 0. This is the default.
1—Sets the international bit in the G.704 frame to 1.

Note

When CRC4 framing is configured, the first bit is the national bit. When no-CRC4 framing is configured, the first bit becomes the international bit and should be set to 1 if crossing international borders and 0 if not crossing international borders.

Sets the five national bits:

0—Set to 0 when not crossing international borders.
1—Set to 1 when crossing international bordrs.

Verifying the National Bit

Use the show controllers command to verify the national bits:


router# show controllers E1
E1 0/1/0 is up.
Applique type is Channelized E1 - balanced
No alarms detected.
alarm-trigger is not set
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
International Bit: 1, National Bits: 11111
Data in current interval (234 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 5 15 minute intervals):
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Configuring the CRC Size for T1

CRC is an error-checking technique that uses a calculated numeric value to detect errors in transmitted data. The 1-Port Channelized OC-3/STM-1 SPA and 1-Port Channelized OC-12/STM-4 SPA uses a 16-bit cyclic redundancy check (CRC) by default, but also supports a 32-bit CRC. The designators 16 and 32 indicate the length (in bits) of the frame check sequence (FCS). A CRC of 32 bits provides more powerful error detection, but adds overhead. Both the sender and receiver must use the same setting.

To set the length of the cyclic redundancy check (CRC) on a T1 interface, use these commands:

Procedure

Command or Action Purpose

	Command or Action	Purpose
Step 1	interface serial slot/ subslot/ port: channel-group Example: `Router(config)# interface serial 0/1/1.1/1/1/1:0`	Selects the interface to configure and enters interface configuration mode. slot/ subslot/ port: channel-group —Specifies the location of the interface.
Step 2	crc {16 \| 32} Example: `Router(config-if)# crc 16`	Selects the CRC size in bits, where: 16—16-bit CRC. This is the default. 32—32-bit CRC.

Step 1

interface serial slot/ subslot/ port: channel-group

Example:


Router(config)# interface serial  0/1/1.1/1/1/1:0

Selects the interface to configure and enters interface configuration mode.

slot/ subslot/ port: channel-group —Specifies the location of the interface.

Step 2

crc {16 | 32}

Example:


Router(config-if)# crc 16

Selects the CRC size in bits, where:

16—16-bit CRC. This is the default.
32—32-bit CRC.

Optional Packet over SONET Configurations

The following sections describe how to configure optional settings on a packet over SONET (POS) interface.

Encapsulation


encapsulation `encapsulation-type` `Router(config-if)# encapsulation hdlc`	Configures encapsulation; you can configure the following options: HDLC PPP

MTU Value


mtu bytes `Router(config-if)# mtu 4000`	Configures the maximum packet size for an interface in bytes. The default packet size is 4470 bytes.

CRC Value

crc size-in-bits


Router(config-if)# crc 32

CRC size in bits. Valid values are 16 and 32. The default is 16.

Keepalive Value


keepalive [`period` [`retries` ]] `Router(config-if)# keepalive 9 4`	Specifies the frequency at which the Cisco IOS software sends messages to the other end of the line to ensure that a network interface is alive, where: `period` — Specifies the time interval in seconds for sending keepalive packets. The default is 10 seconds. `retries` — Specifies the number of times that the device continues to send keepalive packets without response before bringing the interface down. The default is 3 retries.

Bandwidth

Use the following command to configure the bandwidth of a POS interface.

bandwidth {kbps | inherit [kbps ]}

To set and communicate the current bandwidth value for an interface to higher-level protocols, use the bandwidth command in interface configuration mode.Valid values are from 1 to 10000000. You can apply the following keywords:

inherit —Specifies how a subinterface inherits the bandwidth of its main interface.
receive —Specifies the receive-side bandwidth.

Scrambling

Use the following command to enable scrambling on a POS interface.


pos scramble-atm	Enables scrambling on the interface.

C2 Flag

Use the following command to configure the C2 flag on a POS interface.


pos flag c2 `value`	Specifies the C2 byte field for the interface as defined in RFC 2615. Valid values are 0-255.

J1 Flag

Use the following command to configure the J1 flag on a POS interface.


pos flag j1 message `word`	Specifies the value of the J1 byte in the SONET Path OverHead (POH) column.

You can use the following commands to verify your configuration:

show interfaces pos

Configuring Multilink Point-to-Point Protocol

Multilink Point-to-Point Protocol (MLPPP) allows you to combine interfaces which correspond to an entire T1 or E1 multilink bundle. You can choose the number of bundles and the number of T1 or E1 lines in each bundle in any combination of E1 and T1 member link interfaces.

This section describes how to configure MLPPP on the optical interface module and includes the following topics:

MLPPP Configuration Guidelines

When configuring MLPPP, consider the following guidelines:

Only T1 and E1 links are supported in a bundle.
Enable PPP encapsulation before configuring multilink-related commands.
Interfaces can be grouped into the MLPPP bundle if they belong to same interface module.
A group can have a maximum of 16 interfaces.
Maximum MTU for MLPP is 9216. For serial links that are not part of MLPPP configuration, maximum MTU varies for OC-3 and T1/E1 interfaces. The MTU range is as follows:
- OC-3: 64 to 7673
- T1/E1: 64 to 9216

Creating a Multilink Bundle

To create a multilink bundle, use the following commands:

Procedure

Command or Action Purpose

Step 1

configure terminal

Example:


Router# configure terminal

Enters global configuration mode.

Step 2

interface multilink group-number

Example:


Router(config)# interface multilink  1

Creates a multilink interface and enters multilink interface mode, where:

group-number—The group number for the multilink bundle.

Step 3

ip address address mask

Example:


Router(config-if)# ip address  192.168.1.1 255.255.255.0

Sets the IP address for the multilink group, where:

address—The IP address.
mask—The subnet mask.

Assigning an Interface to a Multilink Bundle

To assign an interface to a multilink bundle, use the following commands:

Procedure

	Command or Action	Purpose
Step 1	configure terminal Example: `Router# configure terminal`	Enters global configuration mode.
Step 2	interface serial slot/ subslot/ port Example: `Router(config)# interface serial 0/1/1.1/1/1/1:0`	Selects the interface to configure and enters interface configuration mode, where: slot/ subslot/ port —Specifies the location of the controller.
Step 3	`encapsulation` `ppp` Example: `Router(config-if)# encapsulation ppp`	Enables PPP encapsulation.
Step 4	ppp multilink `group` `group-number` Example: `Router(config-if)# ppp multilink group 1`	Assigns the interface to a multilink bundle, where: group-number—The multilink group number for the T1 or E1 bundle.
Step 5	end

What to do next

Note

Repeat these commands for each interface you want to assign to the multilink bundle


Router# configure terminal
Router(config)# controller SONET 0/1/0
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-4
Router(config-controller)# au-4 1 tug-3 1
Router(config-controller)# tug-2 1 e1 1 channel-group 0 timeslots 1-31
Router# configure terminal
Router(config)# interface multilink 1
Router(config-if)# ip address 192.168.1.1 255.255.255.0
Router(config-if)# ppp multilink endpoint string string1
Router(config)# interface serial 0/1/1.1/1/1/1:0
Router(config-if)# encapsulation ppp
Router(config-if)# ppp multilink group 1

Configuring Fragmentation Size and Delay on an MLPPP Bundle

To configure the fragmentation size on a multilink PPP bundle, use the following commands:

Procedure

	Command or Action	Purpose
Step 1	configure terminal Example: `Router# configure terminal`	Enters global configuration mode.
Step 2	interface multilink `group-number` Example: `Router(config)# interface multilink 1`	Creates a multilink interface and enters multilink interface mode, where: group-number —The group number for the multilink bundle. Range 1-2147483647
Step 3	ppp multilink fragment size `fragment-size` Example: `Router(config-if)# ppp multilink fragment size 512`	Sets the fragmentation size in bytes. Fragmentation is disabled by default. Valid values are 42 to 65535 bytes.
Step 4	ppp multilink fragment-delay `delay` Example: `Router(config-if)# ppp multilink fragment-delay 20`	Sets the configured delay on the multilink bundle that satisfies the fragmentation size, where: delay —Delay in milliseconds.

What to do next

The following example of the show ppp multilink command shows the MLPPP type and the fragmentation size:


Router# 
show ppp multilink
Multilink1, bundle name is test2
Bundle up for 00:00:13
Bundle is Distributed
0 lost fragments,
0 reordered, 0 unassigned
0 discarded, 0 lost received, 206/255 load
0x0 received sequence,
0x0 sent sequence Member
links: 2 active, 0 inactive (max not set, min not set)
Se0/1/0/1:0, since 00:00:13, no frags rcvd
Se0/1/0/2:0, since 00:00:10, no frags rcvd
Distributed fragmentation on.
Fragment size 512.  Multilink in Hardware.

Changing the Default Endpoint Discriminator

To override or change the default endpoint discriminator, use the following command in interface configuration mode:


Command	Purpose
`Router(config-if)# ppp multilink endpoint {hostname \| ip IP-address \| mac LAN-interface \| none \| phone telephone-number \| string char-string }`	Overrides or changes the default endpoint discriminator the system uses when negotiating the use of MLP with the peer.

Disabling Fragmentation on an MLPPP Bundle

By default, PPP multilink fragmentation is enabled. To disable fragmentation on a multilink bundle, use the following commands:

Procedure

Command or Action Purpose

Step 1

configure terminal

Example:


Router# configure terminal

Enters global configuration mode.

Step 2

interface multilink group-number

Example:


Router(config)# interface multilink  1

Specifies the multilink interface and enters multilink interface mode, where:

group-number —The group number for the multilink bundle. Range 1-2147483647

Step 3

ppp multilink fragment disable

Example:


Router(config-if)# ppp multilink fragment disable

Disables PPP multilink fragmentation.

Configuring BERT

BERT (Bit-Error Rate Testing) is used for analyzing quality and for problem resolution of digital transmission equipment. BERT tests the quality of an interface by directly comparing a pseudorandom or repetitive test pattern with an identical locally generated test pattern.

The BERT operation is data-intensive. Regular data cannot flow on the path while the test is in progress. The path is reported to be in alarm state when BERT is in progress and restored to a normal state after BERT has been terminated.

The supported BERT patterns are 2^15, 2^23, all 0s and all 1s.

Configuring Automatic Protection Switching

For information on how to configure Automatic Protection Switching (APS) on the optical interface module, see the Time Division Multiplexing Configuration Guide.

Verifying Interface Configuration

Besides using the show running-configuration command to display your ASR 920 Series Router configuration settings, you can use the show interface serial and the show controllers sonet commands to get detailed information on a per-port basis.

Verifying Per-Port Interface Status

To find detailed interface information on a per-port basis on an optical interface module, use the show interface serial and show controllers sonet commands.

For examples of the show commands here, see the Cisco IOS Interface and Hardware Component Command Reference .

Troubleshooting

You can use the following commands to verify your configuration:

show cem circuit —shows information about the circuit state, administrative state, the CEM ID of the circuit, and the interface on which it is configured. If xconnect is configured under the circuit, the command output also includes information about the attached circuit.
show cem circuit 0-504— Displays the detailed information about that particular circuit.
show cem circuit summary— Displays the number of circuits which are up or down per interface basis.
show controller sonet x/y/z—Displays the alarm information.
show hw-module subslot transceiver— Displays information about the optical transceiver.
show mpls l2transport vc —Displays the state of local and peer access circuits.
show running configuration —Shows detail on each CEM group.
show xconnect all —Displays the state of the pseudowire and local and peer access circuits.
show interfaces pos—Displays all the current interface processors and their interfaces.

The show controllers command output reports the following alarms:

SLOS
SLOF
B1-TCA
B2-TCA

When SLOS is reported, all the other alarms are masked.


Router(config-controller)# show controller sonet 0/1/2
SONET 0/1/2 is down.
  Hardware is A900-IMA4OS
 
Applique type is Channelized Sonet/SDH
Clock Source is Line, AUG mapping is AU4.
. 
.
.
Multiplex Section:
  AIS = 6          RDI = 0          REI = 0          BIP(B2) = 0         
Active Defects: None
Detected Alarms: SLOS SLOF LAIS B1-TCA B2-TCA ......<shows all alarms reported>
Asserted/Active Alarms: SLOS B1-TCA B2-TCA..........<shows hierarchy>
Alarm reporting enabled for: SLOS SLOF SF B1-TCA B2-TCA 
BER thresholds:  SF = 10e-3  SD = 10e-6
TCA thresholds:  B1 = 10e-6  B2 = 10e-6

To provide information about system processes, the Cisco IOS software includes an extensive list of EXEC commands that begin with the word show, which, when executed, display detailed tables of system information. Following is a list of some of the common show commands for the APS feature.

To display the information described, use these commands in privileged EXEC mode.


Command or Action	Purpose
`Router# show aps`	Displays information about the automatic protection switching feature.
`Router# show controller sonet slot / port-adapter / port`	Displays information about the hardware.
`Router# show interfaces`	Displays information about the interface.

For examples of the show commands here, see the Cisco IOS Interface and Hardware Component Command Reference.

Framing and Encapsulation Configuration Example

The following example sets the framing and encapsulation for the controller and interface:


! Specify the controller and enter controller configuration mode
!
Router(config)# controller sonet 0/1/0
!
! Specify the framing method
!
Router(config-controller)# framing esf
!
! Exit controller configuration mode and return to global configuration mode
!
Router(config-controller)# exit
!
! Specify the interface and enter interface configuration mode
!
Router(config)# interface serial 0/1/0:0
!
! Specify the encapsulation protocol
!
Router(config-if)# encapsulation ppp
!
! Exit interface configuratin mode
!
Router(config-if)# exit
!
! Exit global configuration mode
!
Router(config)# exit
Router#

National Bit Configuration Example

The following example sets the Natijonal Bits for the controller:


! Specify the controller and enter controller configuration mode
!
Router(config)# controller t1 0/1/0
!
! Set the national bits
!
Router(config-controller)# 
national reserve 0 1 1 1 1 1
!
! Exit controller configuration mode and return to global configuration mode
!
Router(config-controller)# exit
!
! Exit global configuration mode
!
Router(config)# exit
Router#

CRC Configuration Example

The following example sets the CRC size for the interface:


! Specify the interface and enter interface configuration mode
!
Router(config)# interface serial 0/1/0:0
!
! Specify the CRC size
!
Router(config-if)# crc 32
!
! Exit interface configuration mode and return to global configuration mode
!
Router(config-if)# exit
!
! Exit global configuration mode
!
Router(config)# exit
Router#

Facility Data Link Configuration Example

The following example configures Facility Data Link:


! Specify the controller and enter controller configuration mode
!
Router(config)# controller sonet 0/1/0
!
! Specify the FDL specification
!
Router(config-controller)# 
fdl ansi
!
! Exit controller configuration mode and return to global configuration mode
!
Router(config-controller)# exit
!
! Exit global configuration mode
!
Router(config)# exit
Router#

MLPPP Configuration Example

The following example creates a PPP Multilink bundle:


! Enter global configuration mode
!
Router# configure terminal
!
! Create a multilink bundle and assign a group number to the bundle
!
Router(config)# interface multilink 1
!
! Specify an IP address for the multilink group
!
Router(config-if)# ip address 123.456.789.111 255.255.255.0
!
! Enable Multilink PPP
!
Router(config-if)# ppp multilink
!
! Leave interface multilink configuration mode
!
Router(config-if)# exit
!
! Specify the interface to assign to the multilink bundle
!
Router(config)# interface serial 0/1/0:1
!
! Enable PPP encapsulation on the interface
!
Router(config-if)# encapsulation PPP
!
! Assign the interface to a multilink bundle
!
Router(config-if)# multilink-group 1
!
! Enable Multilink PPP
!
Router(config-if)# ppp multilink
!
! Exit interface configuration mode
!
Router(config-if)# exit
!
! Exit global configuration mode
!
Router(config)# exit
Router#

MFR Configuration Example

The following example configures Multilink Frame Relay (MFR):


! Create a MFR interface and enter interface configuration mode
!
Router(config)# interface mfr 49
!
! Assign the bundle identification (BID) name ‘test’ to a multilink bundle.
!
Router(config-if)# frame-relay multilink bid test
!
! Exit interface configuration mode and return to global configuration mode
!
Router(config-if)# exit
!
! Specify the serial interface to assign to a multilink bundle
!
Router(config)# interface serial 0/1/3:0
!
! Creates a multilink Frame Relay bundle link and associates the link with a multilink bundle
!
Router(config-if)# 
encapsulation frame-relay mfr 49
!
! Assigns a bundle link identification (LID) name with a multilink bundle link
!
Router(config-if)# 
frame-relay multilink lid test
!
! Configures the interval at which the interface will send out hello messages
!
Router(config-if)# frame-relay multilink hello 15
!
! Configures the number of seconds the interface will wait for a hello message acknowledgement before resending the hello message
!
Router(config-if)# frame-relay multilink ack 6
!
! Configures the maximum number of times the interface will resend a hello message while waiting for an acknowledgement
!
Router(config-if)# frame-relay multilink retry 5
!
! Exit interface configuration mode and return to global configuration mode
!
Router(config-if)# exit
!
! Exit global configuration mode
!

Router(config)# exit

Configuration Examples

This section includes the following configuration examples:

Example of Cyclic Redundancy Check Configuration

The following example configures CRC on a T1 interface:


! Specify the interface to configure and enter interface configuration mode.
!
Router(config)# interface serial 0/1/0.1
!
! Specify the CRC type.
!
Router(config-if)# crc 32

Example of Facility Data Link Configuration

The following example configures FDL on a T1 interface:


! Specify the interface to configure and enter interface configuration mode.
!
Router(config)# interface serial 0/1/0.2
!
! Specify the T1 number and select fdl.
!
Router(config-controller)#t1 2 fdl ansi

Example of Invert Data on T1/E1 Interface

The following example inverts the data on the serial interface:


! Specify the interface to configure and enter interface configuration mode.
!
Router(config)# interface serial  0/1/0.1/2/1:0
!
! Configure invert data.
!
Router(config-if)# invert data

Additional Resources

For more information about configuring ATM, see

Asynchronous Transfer Mode Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 920 Series)

For additional information on configuring optical interfaces, see

Cisco IOS Asynchronous Transfer Mode Command Reference
Interface and Hardware Component Configuration Guide, Cisco IOS XE Release 3S
Wide-Area Networking Configuration Guide Library, Cisco IOS XE Release 3S

Bias-Free Language

Results

Chapter: Configuring Optical Interface Modules

Configuring Optical Interface Modules

Limitations and Restrictions

Managing Interface Naming

Identifying Slots and Subslot

Setting the Card Type

Procedure

Example:

Example:

Example:

Configuring the Controller

Configuring SDH

Configuring SDH Mode

SDH T1 Mode

Procedure

Example:

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What to do next

SDH T1 Mode

Procedure

Example:

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What to do next

Configuring SDH in POS Mode

Procedure

Example:

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Configuring SONET Mode

Configuring SONET Mode

Procedure

Example:

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What to do next

Configuring SONET Mode

Example

Configuring SONET POS Mode

Procedure

Example:

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Example: