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Configuring Clear Channel T3/E3 and

Channelized T3 and T1/E1 Controllers on the

Cisco ASR 9000 Series Router

This module describes the configuration of clear channel T3/E3 controllers and channelized T3 and

T1/E1 controllers on the Cisco ASR 9000 Series Aggregation Services Routers.

You must configure the T3/E3 controller before you can configure an associated serial interface.

Feature History for Configuring T3/E3 Controller Interfaces

Release Modification

Release 3.9.0 This feature was introduced on the Cisco ASR 9000 Series Router for the

Cisco 2-Port Channelized OC-12c/DS0 SPA.

Release 4.0.0 Support for the following features was added on the Cisco 2-Port

Channelized OC-12c/DS0 SPA:

•NxDS0 channelization

•Link Noise Monitoring

Support for clear channel T3 controllers on the 1-Port Channelized

OC-48/STM-16 SPA was introduced.

Release 4.0.1 Support for the following SPAs was added:

•Cisco 1-Port Channelized OC-3/STM-1 SPA

•Cisco 2-Port and 4-Port Clear Channel T3/E3 SPA

Release 4.1.0 •Support for the following SPAs was added:

–

Cisco 4-Port Channelized T3/DS0 SPA

–

Cisco 8-Port Channelized T1/E1 SPA

•Support for a Link Noise Monitoring enhancement was added on the

Cisco 2-Port Channelized OC-12c/DS0 SPA to set thresholds for noise

errors on T1/E1 links that are used to signal the Noise Attribute to PPP

for removal of an MLPPP bundle link.

Configuring Clear Channel T3/E3 and Channelized T3 and T1/E1 Controllers on the Cisco ASR 9000 Series Router

Contents

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Contents

•Prerequisites for Configuring T3/E3 Controllers, page 446

•Information About T3/E3 Controllers and Serial Interfaces, page 446

•How to Configure Clear Channel T3/E3 Controllers and Channelized T1/E1 Controllers, page 455

•Configuration Examples, page 484

•Additional References, page 488

Prerequisites for Configuring T3/E3 Controllers

You must be in a user group associated with a task group that includes the proper task IDs. The command

reference guides include the task IDs required for each command. If you suspect user group assignment

is preventing you from using a command, contact your AAA administrator for assistance.

Before configuring T3/E3 controllers, be sure that you have one of the following supported SPAs

installed in the router:

•Cisco 2-Port and 4-Port Clear Channel T3/E3 SPA

•Cisco 4-Port Channelized T3/DS0 SPA

Note The 4-Port Channelized T3/DS0 SPA can run in clear channel mode, or it can be channelized

into 28 T1 or 21 E1 controllers.

•Cisco 1-Port Channelized OC-3/STM-1 SPA

•Cisco 2-Port Channelized OC-12c/DS0 SPA

•Cisco 1-Port Channelized OC-48/STM-16 SPA

•Cisco 8-Port Channelized T1/E1 SPA

•Before you can configure a clear channel T3 controller on the channelized SONET SPAs, you must

configure the SPA for an STS stream channelized for T3. For more information, see the

“Configuring Channelized SONET/SDH on the Cisco ASR 9000 Series Router” module.

Information About T3/E3 Controllers and Serial Interfaces

The 2-Port and 4-Port Clear Channel T3/E3 SPAs support clear channel services over serial lines only.

The 4-Port Channelized T3/DS0 SPA supports clear channel services and channelized serial lines. If a

controller is not channelized, then it is a clear channel controller, and the full bandwidth of its associated

serial line is dedicated to a single channel that carries serial services.

When a T3 controller is channelized, it is logically divided into smaller bandwidth T1 or E1 controllers,

depending on which mode of channelization you select. The sum of the bandwidth of the serial interfaces

on the T1 or E1 controllers cannot exceed the bandwidth of the T3 controller that contains those

channelized T1 or E1 controllers.

When you channelize a T3 controller, each individual T1 or E1 controller is automatically further

channelized into DS0 time slots. A single T1 controller carries 24 DS0 time slots, and a single E1

controller carries 31 DS0 time slots. Users can divide these DS0 time slots up into individual channel

groups. Each channel group can support a single serial interface.

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When a controller is channelized, and channel groups have been created, services are provisioned on the

associated serial interfaces.

The channelization feature in this release allows the following types of channelization:

•A single T3 controller into 28 T1 controllers, for a total controller size of 44210 kbps.

•A single T3 controller into 21 E1 controllers, for a total controller size of 43008 kbps.

•A single T1 controller supports up to 1.536 MB.

•A single E1 controller supports up to 2.048 MB.

Note A single shared port adapter (SPA) can support up to 448 channel groups.

This section includes the following additional topics:

•Supported Features, page 447

•Configuration Overview, page 452

•Default Configuration Values for T3 and E3 Controllers, page 452

•Default Configuration Values for T1 and E1 Controllers, page 453

•Link Noise Monitoring on T1 or E1 Links, page 454

Supported Features

Table 1 shows a summary of some of the supported features by SPA type.

Table 1 Supported Features on Channelized T3/E3, T1/E1, and Clear Channel SPAs

1-Port

Channelized

OC-3/STM-1

SPA

2-Port

Channelized

OC-12c/DS0

SPA

1-Port Channelized

OC-48/STM-16 SPA

4-Port

Channelized

T3/DS0 SPA

8-Port

Channelized

T1/E1 SPA

2-Port and

4-Port Clear

Channel T3/E3

SPA

Bit Error Ratio

Test (BERT)

T3, T1, E3,

E1, and DS0

channels

Maximum of

12 sessions1

Maximum 1

session for T1

T3 channels T3 and E3

Maximum of 2

simultaneous BERT

tests are possible per

STS-12.

T3, T1, E1

and DS0

channels

T1, E1, and

DS0 channels

T3 and E3

1 session per

port

Channelization

and

Clear Channel

Modes

Channelized

SONET/SDH

Channelized

T1/E1 to DS0s

Clear channel

SONET

Clear channel

T3 and E3 in

SDH mode for

serial

interfaces

Channelized

SONET/SDH

Channelized

T3/E3

Channelized

T1/E1 to DS0s

Clear channel

SONET

Channelized

SONET/SDH

Channelized T3/E3

Clear channel

SONET

Channelized

T1/E1

T3 clear

channel

Channelized

T1/E1 to

DS0s.

Clear channel

T1 and E1

Clear channel

T3 or E3 only

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DSU Modes Adtran

Digital-link

Cisco

Kentrox

Larscom

Ve r i l i n k

For E3

Cisco

(Default)

Digital Link

Kentrox

Adtran

Digital-link

Cisco Kentrox

Larscom

Verilink

Adtran

Digital-link

Cisco

Kentrox

Larscom

Verilink

Note Subrate for

E3 is not

supported.

Adtran

Digital-link

Cisco

Kentrox

Larscom

Ve r i l i n k

Adtran

Digital-link

Cisco

Kentrox

Larscom

Ve r i l i n k

Adtran

Digital-link

Cisco

Kentrox

Larscom

Verilink

Encapsulations Frame Relay

HDLC

PPP

HDLC

PPP

Frame Relay

HDLC

PPP

Frame Relay

HDLC

PPP

Frame Relay

HDLC

PPP

Frame Relay

HDLC

PPP

Equal Cost

Multipath

(ECMP)

Yes ECMP support

for egress paths

over T3 or T1

speed channels

with either PPP

or HDLC

encapsulation

ECMP support

for paths on

multiple

controllers,

SPAs, and SIPs

Yes Yes Ye s Yes

Facility Data

Link (FDL)

Yes Yes Yes Yes Ye s No

Far End Alarm

Control (FEAC)

For T3 C-bit

framing

For T3 C-bit

framing

For T3 C-bit

framing

For T3 C-bit

framing

For T3 C-bit

framing

Inter-Chassis

Stateful

Switchover

(ICSSO)2

For PPP on

T3, T1, and E1

channels only

(not DS0)

For MLPPP on

T1 and E1

sessions

For PPP on T3

channels

For T1 when T3

channels are

configured on

the same

system, SIP,

SPA or port

No T3, T1, and

E1 channels

only (not

DS0)

T1 and E1

channels only

(not DS0)

Table 1 Supported Features on Channelized T3/E3, T1/E1, and Clear Channel SPAs (continued)

1-Port

Channelized

OC-3/STM-1

SPA

2-Port

Channelized

OC-12c/DS0

SPA

1-Port Channelized

OC-48/STM-16 SPA

4-Port

Channelized

T3/DS0 SPA

8-Port

Channelized

T1/E1 SPA

2-Port and

4-Port Clear

Channel T3/E3

SPA

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IP Fast Reroute

(IP-FRR)

No For PPP only No T3, T1, and

E1 channels

T1 and E1

channels

Link Noise

Monitoring

No Yes No No No No

Loopback3

Yes Yes Yes Yes —Not

DS0

Yes—Not DS0 Yes

Maintenance

Data Link (MDL)

Message

Support

Yes Yes Yes Yes N /A Yes

Circuit

Emulation

Service Over

Packet

Switched

Network

Support

Yes Yes No No No No

Mixed Channel

Support

No—T3 and

E3 cannot be

mixed.

T1 and E1

cannot coexist

on single

STS-1.

Yes —T3 and

T1 channels

supported on

the same SIP,

SPA, or port

Yes Yes No—All

channels must

be either in T1

or E1 mode.

No—All ports

must be either

T3 or E3.

Scalability 1000 channels

per SPA

48 T3 channels

per SIP

24 T3 channels

per SPA

12 T3 channels

per interface

48 T3/E3 channels 1000 channels

per SPA

8 T1 or E1

ports

Up to 256

full-duplex

HDLC

channels

Nx64K or

Nx56K

channel

speeds, where

Nis less than

or equal to 24

for T1, and

less than or

equal to 32 for

2 or 4 T3 or E3

ports

1. 6 simultaneous BERT sessions among first three physical ports and 6 simultaneous BERT sessions on 4th port.

2. All interfaces configured on a SONET/SDH controller for the 1-Port Channelized OC-3/STM-1 SPA should be IC-SSO protected or none of them should

be IC-SSO protected.

Table 1 Supported Features on Channelized T3/E3, T1/E1, and Clear Channel SPAs (continued)

1-Port

Channelized

OC-3/STM-1

SPA

2-Port

Channelized

OC-12c/DS0

SPA

1-Port Channelized

OC-48/STM-16 SPA

4-Port

Channelized

T3/DS0 SPA

8-Port

Channelized

T1/E1 SPA

2-Port and

4-Port Clear

Channel T3/E3

SPA

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Loopback Support

Cisco 1-Port Channelized OC-3/STM-1 SPA

This section describes the types of loopback supported on the 1-Port Channelized OC-3/STM-1 SPA:

•For SONET controller:

–

Local loopback

–

Network line loopback

•For T3:

–

Local loopback

–

Network loopback

–

Remote loopback line (Use FEAC in C-Bit mode for T3)

–

Remote loopback payload (Use FEAC in C-Bit mode for T3)

•For E3:

–

Local loopback

–

Network loopback

•For T1:

–

Local loopback

–

Network line loopback

–

Remote line FDL ANSI loopback (also known as Remote CSU loopback - ESF mode)

–

Remote line FDL Bellcore loopback (also known as Remote SmartJack loopback - ESF mode)

–

Remote line inband loopback (SF inband loopback)

–

Remote payload FDL ANSI loopback (ESF remote payload loopback)

•For E1:

–

Local loopback

–

Network line loopback

Cisco 2-Port Channelized OC-12c/DS0 SPA

This section describes the types of loopback supported on the 2-Port Channelized OC-12c/DS0 SPA:

•For T3

–

Local loopback

–

Network line loopback

•For ports

–

Local line loopback

–

Network line loopback

3. For detailed information about loopback support, see the “Loopback Support” section on page 450.

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Cisco 1-Port Channelized OC-48/STM-16 SPA

This section describes the types of loopback supported on the 1-Port Channelized OC-48/STM-16 SPA:

•For SONET:

–

Local line loopback

–

Network line loopback

•For T3:

–

Local loopback

–

Network line loopback

–

Network payload loopback

•For E3:

–

Local loopback

–

Network loopback

Cisco 4-Port Channelized T3/DS0 SPA

This section describes the types of loopback supported on the 4-Port Channelized T3/DS0 SPA:

•For T3:

–

Local loopback

–

Network loopback

–

Remote loopback line

•For T1:

–

Local loopback

–

Network line loopback

–

Remote line FDL ANSI loopback (also known as Remote CSU loopback - ESF mode)

–

Remote line FDL Bellcore loopback (also known as Remote SmartJack loopback - ESF mode)

•For E1:

–

Local loopback

–

Network line loopback

Cisco 8-Port Channelized T1/E1 SPA

This section describes the types of loopback supported on the 8-Port Channelized T1/E1 SPA:

•For T1:

–

Local loopback

–

Networkl line loopback

–

Remote line FDL ANSI loopback (also known as Remote CSU loopback - ESF mode)

–

Remote line FDL Bellcore loopback (also known as Remote SmartJack loopback - ESF mode)

•For E1:

–

Local loopback

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Cisco 2-Port and 4-Port Clear Channel T3/E3 SPA

This section describes the types of loopback supported on the 2-Port and 4-Port Clear Channel T3/E3

SPA:

•Local loopback

•Network payload loopback (Configure the local framer to send all data received from the remote side

back to the remote side.)

•Network line loopback (Configure the local LIU to send all data received from the remote side back

to the remote side.)

•Remote line loopback (Use FEAC to request the remote interface to loop back to SPA—T3 only)

Configuration Overview

Configuring a channelized T3 controller and its associated serial interfaces is a 4-step process:

Step 1 Configure the T3 controller, and set the mode for that controller to T1 or E1.

Step 2 Configure the T1 or E1 controller.

Step 3 Create channel groups and assign DS0 time slots to these channel groups as desired.

Step 4 Configure the serial interfaces that are associated with the individual channel groups, as described in the

Configuring Serial Interfaces on the Cisco ASR 9000 Series Router module later in this document.

Default Configuration Values for T3 and E3 Controllers

Table 2 describes the default configuration parameters that are present on the T3 and E3 controllers.

Note • Auto-detect framing is not supported on the 2-Port Channelized OC-12c/DS0 SPA.

•E3 is not supported on the 4-Port Channelized T3/DS0 SPA.

Table 2 T3 and E3 Controller Default Configuration Values

Parameter Default Value Configuration File Entry

Frame type for the data line For T3: C-bit framing

For E3: G.751

framing {auto-detect | c-bit

| m23}

Clocking for individual T3/E3 links internal clock source {internal |

line}

Cable length 224 feet cablelength feet

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Note When configuring clocking on a serial link, you must configure one end to be internal, and the other

end to be line. If you configure internal clocking on both ends of a connection, framing slips occur. If

you configure line clocking on both ends of a connection, the line does not come up.

Default Configuration Values for T1 and E1 Controllers

Table 3 describes the default configuration parameters that are present on the T1 and E1 controllers.

Maintenance data link (MDL) messages

(T3 only)

disable mdl transmit {idle-signal |

path | test-signal} {disable |

enable}

National reserved bits for an E3 port

(E3 only)

enable, and the bit pattern

value is 1.

national bits {disable |

enable}

Table 2 T3 and E3 Controller Default Configuration Values

Parameter Default Value Configuration File Entry

Table 3 T1 and E1 Controller Default Configuration Values

Parameter Default Value Configuration File Entry

Frame type for the data line For T1: extended

superframe (esf)For E1:

framing with CRC-4 error

monitoring capabilities

(crc4).

For T1: framing {sf |

esf}For E1: framing {crc4 |

no-crc4 | unframed

Detection and generation of T1 yellow

alarms.

(T1 only)

Yellow alarms are

detected and generated on

the T1 channel.

yellow {detection |

generation} {disable |

enable}

Clocking for individual T1 and E1 links internal clock source {internal |

line}

Cable length

(T1 only)

For cablelength long

command: db-gain-value:

gain26; db-loss-value:

0db.

For cablelength short

command: 533 feet.

To set a cable length of

longer than 655 feet:

cablelength long

db-gain-value db-loss-value

To set a cable length of 655

feet or shorter: cablelength

short length

Transmission of ANSI T1.403 or AT&T

TR54016 once-per-second performance

reports through Facility Data Link (FDL)

for a T1 channel

(T1 only)

disable fdl {ansi | att} {enable |

disable}

National reserved bits for an E1 port

(E1 only)

0 (which corresponds to

0x1f in hexadecimal

format)

national bits bits

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Note When configuring clocking on a serial link, you must configure one end to be internal, and the other

end to be line. If you configure internal clocking on both ends of a connection, framing slips occur. If

you configure line clocking on both ends of a connection, the line does not come up.

Link Noise Monitoring on T1 or E1 Links

Link Noise Monitoring (LNM) provides the ability to monitor Path Code Violation (PCV) errors on T1

and E1 links on the 2-Port Channelized OC-12c/DS0 SPA on the Cisco ASR 9000 Series Router, and to

signal events and alarms on these links when noise continuously meets or exceeds configured thresholds

(the set threshold values) for those errors. Events are also signaled when noise falls below configured

improved thresholds (the clear threshold values).

Beginning in Cisco IOS XR Release 4.1, the LNM feature supports the lnm remove command to signal

the Noise Attribute to PPP to remove an MLPPP bundle member link when specified thresholds are

crossed.

Note An LCV is an occurrence of either a Bi-Polar Violation (BPV) or Excessive Zeroes (EXZ) error, and a

PCV is an occurrence of a CRC error in a timeslot. However, the LNM feature currently only monitors

PCV errors. The LCV values are only used to calculate an expected PCV if the PCV values are not

specified. If the PCV values are specified, then the LCV values are ignored.

LNM Events

There are two basic types of monitoring events produced by LNM:

•Crossed events—A crossed event signals when PCV threshold values continuously meet or exceed

the specified set values for major and minor warnings for a specified period of time (duration).

When a crossed event occurs, the major or minor monitoring type for the controller is reported as

the alarm state. When the crossed event is no longer present, the monitoring type returns to the

stable state.

The following are examples of crossed events:

RP/0/RSP0/CPU0:Router#0/1/CPU0:May 13 9:54:10.980 : g_spa_1[181]:

%L2-T1E1_LNM-3-MINWARNNOISE :

Interface T10/1/1/0/1/1/1, noise crossed minor warning threshold

RP/0/RSP0/CPU0:Router#0/1/CPU0:May 13 9:54:11.980 : g_spa_1[181]:

%L2-T1E1_LNM-3-MAJWARNNOISE :

Interface T10/1/1/0/1/1/1, noise crossed major warning threshold

•Cleared events—A cleared event signals when threshold values that were crossed have fallen below

the specified clear values for major and minor warnings.

The following are examples of cleared events:

RP/0/RSP0/CPU0:Router#LC/0/1/CPU0:May 13 10:27:25.809 : g_spa_1[181]:

%L2-T1E1_LNM-3-MAJWARNNOISE :

Interface T10/1/1/0/1/1/1, noise cleared major warning threshold

RP/0/RSP0/CPU0:Router#LC/0/1/CPU0:May 13 10:28:14.810 : g_spa_1[181]:

%L2-T1E1_LNM-3-MINWARNNOISE :

Interface T10/1/1/0/1/1/1, noise cleared minor warning threshold

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