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Cisco IOS Software Releases 12.0 S

PA-MC-2CT3+ Phase-II (T3 subrate)

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PA-MC-2T3+ Phase-II (T3 subrate)

Table Of Contents

PA-MC-2T3+ Phase-II (T3 subrate)

Feature Overview

Benefits

Restrictions

Related Features and Technologies

Related Documents

Supported Platforms

Supported Standards, MIBs, and RFCs

Configuration Tasks

Configuring the T3 Controller

Configuring the Serial Interface

Verifying the Configuration

Troubleshooting Tips

Monitoring and Maintaining the PA-MC-2T3+

Configuration Examples

Configuring a T3 Controller

Configuring a Full-Rate T3 Interface

Configuring a Subrate T3 Interface

Command Reference

no channelized


PA-MC-2T3+ Phase-II (T3 subrate)


This feature module describes the availability of clear channel (T3 subrate) on the Two-Port Enhanced Multichannel T3+ Port Adapter (PA-MC-2T3+). It includes information on the benefits of this new feature, supported platforms, configuration examples, and a command reference.

This document contains the following sections:

Feature Overview

Supported Platforms

Supported Standards, MIBs, and RFCs

Configuration Tasks

Monitoring and Maintaining the PA-MC-2T3+

Configuration Examples

Command Reference

Feature Overview

The PA-MC-2T3+ is a single-width port adapter that provides two T3 interface connections. Each T3 interface can now be independently configured to be either channelized or unchannelized. A channelized T3 provides 28 T1 lines multiplexed into the T3. Each T1 line can be configured into one or more serial interface data channels.

Using the no channelized command, you can configure the T3 as a single, unchannelized serial interface data channel. You can configure this data channel to use all of the T3 bandwidth or a portion of it.

Benefits

The PA-MC-2T3+ now provides the following benefits:

Two T3 ports each with integrated CSU/DSUs

Two T3 ports on one single-wide port adapter

Up to 256 logical, T1 Nx56K and Nx64K channels

28 T1 ports multiplexed into a single T3 connection

Channelized T1, fractional T1, and full-rate T1 support

Subrate and full rate T3 support

Line and payload loopback capabilities

Full bit error rate testing on any T1 or any unchannelized T3

DSX-3 level interface

Full duplex and connectivity at DS3 rate (44.736 Mbps)

T3 Scrambling and subrate can be independently or simultaneously enabled in each DSU mode

C-bit or M13 framing

B3ZS line coding

DS3 FEAC channel support

Support for Frame Relay, PPP, HDLC, SMDS DXI, and X.25

Restrictions

The PA-MC-T3+ does not support the following:

More than 128 channels per T3

Use of unused channels of one T3 by the other T3

Related Features and Technologies

PA-MC-T3

PA-2T3+

PA-MC-2T3+ Phase I

Related Documents

PA-MC-2T3+ Multichannel T3 Port Adapter Installation and Configuration

Supported Platforms

Cisco 7200 series

Cisco 7500 series

Supported Standards, MIBs, and RFCs

Standards

ANSI T1.107

ANSI T1.102

ANSI T1.403

ANSI T1.404

AT&T 62411

AT&T 54016

AT&T 54014

FCC Part 68

AT&T TR-NWO-00499

UL1950 3rd Edition/CSA C22.2, No. 950

FCC Part 15, Class A

MIBs

No new or modified MIBs are supported by this feature.

To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB web site on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

RFCs

RFC 1406, Definitions of Managed Objects for the DS1 and E1 Interface Types

RFC 1407, Definitions of Managed Objects for the DS3/E3 Interface Type

Configuration Tasks

See the following sections for configuration tasks for the T3 subrate feature. Each task in the list is identified as either optional or required.

Configuring the T3 Controller (Required)

Configuring the Serial Interface (Required)

Verifying the Configuration (Optional)

Configuring the T3 Controller

 
Command
Purpose

Step 1 

Router(config)# controller T3 interface-processor-slot/port-adapter-slot/T3-port

Cisco 7500 series routers

Router(config)# controller T3 chassis-slot/T3-port

Cisco 7200 series routers

Select the T3 controller you want to configure.

Step 2 

Router(config-controller)# no channelized


Change to subrate mode will cause cbus complex reset. 
Proceed? [yes/no]: Y

Configures unchannelized mode for the T3 controller.

When the PA-MC-2T3+ is configured for unchannelized T3 mode, the default MTU size is set to 4470 for compatibility with other T3 equipment and port adapters.

The change in MTU sizes will cause a memory recarve and CBus complex to occur, disrupting all traffic on the router for several minutes. (This occurs only on Cisco 7500 series routers.)

Type Y for "yes" at the end of the warning. At the prompt, type ^Z to exit. You will exit configuration mode, and enter unchannelized mode.

Step 3 

Router(config-controller)# bert pattern pattern 
interval time

Sends a BERT pattern on the T3 line to test cable and signal problems in the field.

pattern:

0s, repetitive test pattern of all zeros (00000)

1s, repetitive test pattern of all ones (11111)

2^15, pseudorandom O.151 test pattern (32.768 bits long)

2^20, pseudorandom O.151 test pattern (1.046,575 bits long)

2^23, pseudorandom O.151 test pattern (8,388,607 bits long)

alt-0-1, repetitive alternating test pattern of zeros (0s) and ones (1s), (01010101)

time—1-14400 minutes

Step 4 

Router(config-controller)# mdl {transmit {path | 
idle-signal | test-signal} | string {eic | lic | fic | 
unit | pfi | port | generator} string}

Configures Maintenance Data Link (MDL) messages on the PA-MC-2T3+.


Note MDL messages are only supported when the T3 framing is set for c-bit.


transmit path—enables transmission of the MDL path message

transmit idle-signal—enables transmission of the MDL idle-signal message

eic—equipment identification code (up to 10 characters)

lic—location identification code (up to 11 characters)

fic—frame identification code (up to 10 characters)

unit—unit identification code (up to 6 characters)

pfi—facility identification code to send in the MDL path message (up to 38 characters)

port—equipment port, which initiates the idle signal, to send in the MDL idle signal message (up to 38 characters)

generator—generator number to send in the MDL test signal message (up to 38 characters)

Use the no form of this command to remove MDL messages. The default is that no MDL message is configured.

Configuring the Serial Interface

 
Command
Purpose

Step 1 

Cisco 7500 series routers:

Router# configuration terminal

Router(config)# interface serial interface-processor-slot/port-adapter-slot/T3-port


or


Cisco 7200 series routers:

Router# configuration terminal

Router(config)# controller T3 chassis-slot/T3-port

Enables interface configuration mode and selects a serial interface to configure.

Step 2 

Router(config-if)# framing {c-bit | m13}

Specifies the T3 framing on the serial interface.

c-bit—C-bit parity DS3 framing

m13—M13 Multiplex DS3 framing

The default is C-bit framing.

Step 3 

Router(config-if)# cablelength feet

Specifies the cable length.

feet—a numeral from 0 to 450

Step 4 

Router(config-if)# clock source {line | internal}

Sets the clock source for the selected T3 interface.

line—selects a network clock source

internal—selects an internal clock source

Step 5 

Router(config-if)# dsu mode [ 0 | 1 |2 | 3 | 4 ]

Configures the PA-MC-2T3+ to emulate a proprietary DSU subrate scheme.

0—Digital Link or Cisco—300-44210 Kbps

1—ADC Kentrox T3/E3 IDSU—1500-35000, 44210 Kbps

2—Larscom Access T45—3100-44210 Kbps

3—Adtran T3SU 300—75-44210 Kbps

4—Verilink HDM 2182—1500-44210 Kbps

Default is 0.

Step 6 

Router(config-if)# dsu bandwidth bandwidth

Configures the bandwidth for an unchannelized subrate T3 interface.

bandwidth—a numeric value between 1 and 44210

The default bandwidth is 44210.

Verifying the Configuration

After configuring a new T3 controller, you can verify the configuration by using show commands. To display the status of any a new T3 controller or newly configured interface, complete any of the following tasks in EXEC mode:


Step 1 Display the status of the T3 controller on a Cisco 7200 series router using the show controllers t3 port-adapter/t3-port [brief | tabular] command.

or

Display the status of the T3 controller on a Cisco 7500 series router using the show controllers t3 slot/port-adapter/t3-port [brief | tabular] command:

Router# show controllers t3 0/1/0 brief
T3 0/1/0 is up.  Hardware is 2CT3+ single wide port adapter
  CT3 H/W Version: 0.1.1, CT3 ROM Version: 0.95, CT3 F/W Version: 2.4.0
  FREEDM version: 1, reset 0
  Applique type is Subrate T3
  No alarms detected.
  MDL transmission is disabled
    
  FEAC code received: No code is being received
  Framing is C-BIT Parity, Line Code is B3ZS, Clock Source is Line
  Rx throttle total 0, equipment customer loopback
Router# show controllers t3 0/1/0 tabular
T3 0/1/0 is up.  Hardware is 2CT3+ single wide port adapter
  CT3 H/W Version: 0.1.1, CT3 ROM Version: 0.95, CT3 F/W Version: 2.4.0
  FREEDM version: 1, reset 0
  Applique type is Subrate T3
  No alarms detected.
  MDL transmission is disabled
    
  FEAC code received: No code is being received
  Framing is C-BIT Parity, Line Code is B3ZS, Clock Source is Line
  Rx throttle total 0, equipment customer loopback
  INTERVAL      LCV   PCV   CCV   PES  PSES  SEFS   UAS   LES   CES  CSES
  06:17-06:24     0     0     0     0     0     1     0     0     0     0
  06:02-06:17     4     2     1     1     0     0     1     0     0     0
  05:47-06:02     0     0     0     0     0     0     0     0     0     0
  05:32-05:47     0     0     0     0     0     0     0     0     0     0
  05:17-05:32     0     0     0     0     0     0     0     0     0     0
  05:02-05:17     0     0     0     0     0     0     0     0     0     0
  04:47-05:02     0     0     0     0     0     0     0     0     0     0
  04:32-04:47     0     0     0     0     0     0     0     0     0     0
  04:17-04:32     0     0     0     0     0     0     0     0     0     0
  04:02-04:17     0     0     0     0     0     0     0     0     0     0
  03:47-04:02     0     0     0     0     0     0     0     0     0     0
  03:32-03:47     0     0     0     0     0     0     0     0     0     0
  03:17-03:32     0     0     0     0     0     0     0     0     0     0
[additional command output omitted]

 

Step 2 Display statistics about the serial interface for a specific T3 line on a Cisco 7500 series router using the show interfaces serial slot/port-adapter/t3-port command:

Router# show interfaces serial 1/0/0
Serial1/0/0 is up, line protocol is up 
  Hardware is cyBus 2CT3+ Serial
  MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, crc 16, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:09, output 00:00:07, output hang never
  Last clearing of "show interface" counters never
  Queueing strategy: fifo
  Output queue 0/40, 4 drops; input queue 0/75, 0 drops
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     4 packets input, 402 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
              0 parity
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 1 abort
     5 packets output, 1008 bytes, 0 underruns
     0 output errors, 0 applique, 1 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
 DSU mode 0, bandwidth 44210, scramble 0

or

Use the show interfaces serial port-adapter/t3-port command to display statistics about the serial interface for a specific T3 line on a Cisco 7200 series router:

Router# show interfaces serial 5/0
Serial5/0 is up, line protocol is down 
  Hardware is PA-MC-2T3+
  MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, 
     reliability 128/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, crc 16, loopback not set
  Keepalive set (10 sec)
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Queueing strategy: fifo
  Output queue 0/40, 0 drops; input queue 0/75, 0 drops
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
              0 parity
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     5823 packets output, 140669 bytes, 0 underruns
     0 output errors, 0 applique, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     1 carrier transitions
 DSU mode 0, bandwidth 44210, scramble 0

Troubleshooting Tips

Set loopbacks to troubleshoot the PA-MC-2T3+.

Setting Loopbacks

You can configure the T3 controller for loopback modes using the serial interface loopback command. The default is no loopback. The three main loopback modes are: local, network, and remote. The T3 local loopback simultaneously loops the T3 port toward the router and loops the T3 link back toward the network.

The T3 network loopback loops the T3 line or payload back toward the network. A T3 remote loopback loops the T3 line at the remote end. Use T3 loopbacks to diagnose problems with cables between the port adapter and the central switching office at the T3 line level. You can also use the loopback modes with bit error rate (BER) tests.

To set a loopback on the T3 controller or T3 lines, perform the following optional tasks beginning in global configuration mode:

 
Task
Command

Step 1 

Select the T3 serial interface and enter interface configuration mode.

Router(config)# interface serial 
slot/port-adapter/port

(Cisco 7500 series and Cisco 7000 series routers with RSP)

Router(config)# interface serial slot/port 

(Cisco 7200 series)

Step 2 

Set a loopback on the T3 controller.

Router(config-controller)# loopback {local | network | remote}

Monitoring and Maintaining the PA-MC-2T3+

Command
Purpose

Cisco 7500 series routers:

Router# show controllers T3 slot/port-adapter/t3-port


Cisco 7200 series routers:

Router# show controllers T3 slot/t3-port

Displays the configuration, including the results of BER tests, for a specified T3 controller.

Cisco 7500 series routers:

Router# show interface serial slot/port-adapter/t3-port


Cisco 7200 series routers:

Router# show interface serial slot/t3-port

Displays the interface configuration of a specified serial interface.


Configuration Examples

This section provides the following configuration examples:

Configuring a T3 Controller

Configuring a Full-Rate T3 Interface

Configuring a Subrate T3 Interface

Configuring a T3 Controller

The following example configures the T3 controller of a PA-MC-2T3+ on a VIP2 or VIP4 in interface processor slot 1on a Cisco 7500 series router:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller T3 1/0/0
Router(config-controller)# no channelized
 
Change to subrate mode will cause cbus complex reset. Proceed? [yes/no]:Y
Router(config-controller)# exit
Router(config)# interface serial 1/0/0
Router(config-if)# framing c-bit
Router(config-if)# cablelength 40
Router(config-if)# clock source line
Router(config-if)# mdl transmit path

The following example configures the T3 controller of a PA-MC-2T3+ in slot 1 of a Cisco 7200 series router:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller T3 1/0
Router(config-controller)# no channelized
Router(config-controller)# exit
Router(config)# interface serial 1/0/0
Router(config-if)# framing c-bit
Router(config-if)# cablelength 40
Router(config-if)# clock source line
Router(config-if)# mdl transmit path

Configuring a Full-Rate T3 Interface

The following example configures a full-rate T3 interface on a Cisco 7500 series router by using the no channelized command:

Router(config)# controller t3 2/0/0
Router(config-controller)# no channelized
Change to subrate mode will cause cbus complex reset. Proceed? [yes/no]: Y
Router(config-controller)# exit
Router(config)# interface serial 2/0/0
Router(config-if)# encapsulation ppp
Router(config-if)# ip address 10.10.10.10 255.255.255.255
Router(config-if)# no shutdown

Configuring a Subrate T3 Interface

In order to configure a subrate T3 interface, you must first configure the interface as a full-rate T3 using the no channelized configuration controller command. After the full-rate T3 interface is configured, use the dsu bandwidth command to create a subrate T3 interface.The following example configures a subrate T3 interface on a Cisco 7200 series router:

Router(config)# controller t3 2/0
Router(config-controller# no channelized
Router(config-controller)# exit
Router(config)# interface serial 2/0
Router(config-if)# dsu bandwidth 16000
Router(config-if)# encapsulation frame-relay
Router(config-if)# ip address 10.10.10.10 255.255.255.255
Router(config-if)# no shutdown

Command Reference

This section documents the new command that configures the clear channel T3 subrate feature.

no channelized

To configure the T3 controller for unchannelized mode, use the no channelized configuration controller command. To configure channelized mode, use the channelized form of this command.

channelized

no channelized

Syntax Description

This command has no arguments or keywords.

Defaults

MTU size is set to 4470.

Command Modes

Configuration controller

Command History

Release
Modification

12.0(14)S

This command was introduced.


Usage Guidelines

Use the no channelized configuration controller command to configure the T3 controller for unchannelized mode. When you configure the PA-MC-2T3+ on a Cisco 7500 series router with the no channelized command, the MTU size is set to 4470. In channelized mode, the default MTU size is 1500. The change in MTU sizes will cause a memory recarve and CBus complex to occur, disrupting all traffic on the router for several minutes.

The following message will be displayed when switching between channelized and unchannelized modes on a Cisco 7500 series router:

Change to subrate mode will cause cbus complex reset. Proceed? [yes/no]: Y

Type Y for "yes" at the end of the warning. At the prompt, type ^Z to exit. You will exit configuration mode and enter unchannelized mode.

Examples

The following example configures unchannelized mode on a PA-MC-2T3+ in port adapter slot 1 of a VIP2 or VIP4 in a Cisco 7500 series router:

configure terminal
  controller T3 1/1/0
  no channelized
    Change to subrate mode will cause cbus complex reset. Proceed? [yes/no]: Y
  ^Z