Preparing PXM1E Lines for Communication

Table Of Contents

Preparing PXM1E Lines for Communication

Configuration Quickstart

Configuring the Card Mode

Setting Up Lines

Bringing Up Lines

Configuring Lines

Verifying Line Configuration

Establishing Redundancy Between Two Lines with APS

Configuring Intracard APS Lines

Configuring Intercard APS Lines

Preparing PXM1E Lines for Communication

This chapter describes how to prepare PXM1E cards and lines for physical connectivity to other switches or a CPE. Chapter 11, "Provisioning PXM1E Communication Links," describes how to add ports and connections that support ATM communications across the cards and lines configured in this chapter.

This chapter provides a quickstart procedure for configuring PXM1E cards and lines and describes the following procedures:

• Configuring the Card Mode

• Setting Up Lines

• Configuring Lines

• Establishing Redundancy Between Two Lines with APS

Note The procedures in this chapter do not apply to the Cisco MGX 8850 (PXM45) or the Cisco MGX 8950. PXM45 cards do not provide ATM lines. Cisco MGX 8850 (PXM45) and Cisco MGX 8950 switches support ATM communication on the AXSM card.

Configuration Quickstart

The quickstart procedure in this section provides a summary of the tasks required to prepare PXM1E cards and lines for configuration as ATM trunks and lines. This procedure is provided as an overview and as a quick reference for those who already have configured Cisco MGX 8850 (PXM1E) and Cisco MGX 8830 switches.

Command

Purpose

Step 1

username

<password>

Start a configuration session.

Note To perform all the steps in this quickstart procedure, you must log in as a user with GROUP1 privileges or higher.

Step 1

cnfcdmode <mode>

Configure the operational mode of all lines on PXM1E cards that support T1, E1, T3 or E3 lines. This step selects either T1 or E1, or either T3 or E3, depending on the card type.

Note You need to configure the card mode before you provision connections on the PXM1E card.

Step 2

upln <bay.line>

Related commands:

dsplns

dspln -type <bay.line>

Bring up and configure lines. This step establishes physical layer connectivity between two switches.

See the " Setting Up Lines" section later in this chapter.

Step 3

cnfln <options>

Related commands:

dsplns

dspln -type <bay.line>

Configure lines if the default configuration parameters must be changed.

See the " Configuring Lines" section later in this chapter.

Step 4

addapsln <workingIndex> <protectIndex> <archmode>

dspapslns

dspapsln working-slot.bay.line>

Configure a redundant relationship between two PXM1E lines.

See the " Establishing Redundancy Between Two Lines with APS" section later in this chapter.

Configuring the Card Mode

Enter the cnfcdmode <mode> command at the active PXM1E to configure the operational mode of all lines on the PXM1E card. If you are configuring a PXM1E that supports T1 and E1 lines, replace <mode> with one of the following:

•1 to specify all lines as T1 lines

•2 to specify all lines as E1 lines

If you are configuring a PXM1E that supports T3 and E3 lines, replace <mode> with one of the following:

•3 to specify all lines as T3 lines

•4 to specify all lines as E3 lines

Note The cnfcdmode command does not apply to the OC3c/SDH or higher speed lines.

In the following example, the user configures all lines on the PXM UNI/NNI combination back card to operate as E3 lines.

Unknown.7.PXM.a > cnfcdmode 4

To verify the card's operational mode, enter the dsplns command. The configured mode is displayed in the Line Type column. For example, if the card mode is set to support T3 lines, the line type is ds3cbitadm. If the card mode is set to support T3 lines, the line type is e3g832adm.

Setting Up Lines

The first step in configuring PXM1E lines is to define the physical lines that are connected to the switch. The following sections describe how to do the following tasks:

•Bring up lines

•Configure lines

•Verify the configuration of lines

Bringing Up Lines

Installing an PXM1E card can add from 1 to 16 lines to your switch. You must bring up a line before you can configure the line or provision services on the line.

Before a line is brought up, or after it is brought down, the switch does not monitor the line. The PXM1E port status light for the line is unlit, and all line alarms are cleared.

When you bring up a line, the switch starts monitoring the line. The PXM1E port status light is green when physical layer communications are established with a remote switch. If physical layer communications problems are detected, the port status light turns red, and alarms are reported.

Note APS protection lines for intracard redundancy should be left down. APS automatically brings up each line at the appropriate time. For general information on APS line redundancy, see "Planning for Card Redundancy, Line Redundancy, and Bulk Distribution." For information on configuring APS lines, see the " Establishing Redundancy Between Two Lines with APS" section later in this chapter.

Tip Line alarms exist until the line is activated at both ends To minimize the number of alarms and failed port LEDs (which display red), keep lines down until they are ready for operation.

To bring up a line on the switch, use the following procedure.

Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.

Step 2 Select the card on which you want to bring up a line with the cc command.

mgx8850a.6.CESM.a > cc <slotnumber>

Replace <slotnumber> with the number of the slot in which the PXM1E card is installed. Valid slot numbers are 7 or 8 on the MGX 8850, and 1 or 2 on the MGX 8830. Verify your card selection by viewing the switch prompt, which should list the slot number and the PXM1E card type.

Step 3 Enter the upln command after the switch prompt.

mgx8850a.8.PXM1E.a > upln <2.line>

The number two specifies bay 2, which is the only bay in which PXM1E lines are available. Replace <line> with the number that corresponds to the line you want to bring up.

Step 4 To verify that a line has been brought up, enter the following command:

mgx8830b.2.PXM.a > dsplns

The line state column shows whether each line is up or down as shown in the following example:

mgx8830b.2.PXM.a > dsplns
Medium Medium
Sonet Line Line Line Frame Line Line Valid Alarm APS
Line State Type Lpbk Scramble Coding Type Intvls State Enabled
------------- ----- ------------ ------ -------- ------ -------- ------ ------- -------
2.1 Adj APS Up sonetSts3c NoLoop Enable NRZ ShortSMF 72 Clear Enable
2.2 Down sonetSts3c NoLoop Enable NRZ ShortSMF 0 Clear Disable
2.3 Up sonetSts3c NoLoop Enable NRZ ShortSMF 72 Clear Disable
2.4 Down sonetSts3c NoLoop Enable NRZ ShortSMF 0 Clear Disable
2.1 Up sonetSts3c NoLoop Enable NRZ ShortSMF 72 Clear Enable

The line state represents the administrative intent for the line. For example, a line is reported as Down until an administrator brings up the line. Once the administrator brings up the line, the line state remains Up until the administrator brings the line down with the dnln command.

The alarm state indicates whether the line is communicating with a remote switch. When the alarm state is reported as Clear, the physical devices at each end of the line have established physical layer communications.

Configuring Lines

All line types are brought up with a default configuration. When configuring trunks between switches, you can accept the defaults for each line and thus minimize configuration time. If you modify line characteristics, make sure the parameter values are the same at both ends of the line.

Use the cnfln command to modify a line's configuration. Table 4-1 describes the parameters you can configure for each line type, and the following subsections describe how to enter the cnfln command for each line type.

Table 4-1 Parameters for cnfln Command

Parameter

Line Types Supported

Description

AIScBitsCheck

T3

The -cb option defines C-bit checking. Set <AIScBitsCheck> to 1 to enable C-bit checking. Set it to 2 to ignore the C-bit.

bay.line

T1
E1
T3
E3
SONET

Replace bay with 2 to specify that the line is connected to a PXM1E back card in the uplink bay.

Replace line with the number that corresponds to the line you want to configure.

clockSource

T1
E1
T3
E3
SONET

The -clk option selects the source timing for transmitting messages over the line. Replace <clockSource> with 1 to use the clock signal received over this line from a remote node, or specify 2 to use the local timing defined for the local switch.

LineLength

T1
T3

The -len option specifies the length of a line from the local node to a remote node in meters. Enter a value from 0 to 64000 meters.

LineType

SONET

Enter -slt 1 for SONET or -slt 2 for SDH.

LineType

T3

Enter -lt 1 for ds3cbitadm or -lt 2 for ds3cbitplcp.

OOFCriteria

T3

Out of Frame (OOF) alarm criteria. Replace <OOFCriteria> with 1 to select 3 out of 8 and 2 to select 3 out of 16.

RcvFEACValidation

T3

Replace <RcvFEACValidation> with 1 to select 4 out of 5 and 2 to select 8 out of 10.

Configuring T1 (DS1) Lines

At the physical level, you can configure the length and the clock source for T1 lines. The following procedure describes how to configure T1 lines.

Note T1 lines are also called DS1 lines in the CLI.

Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.

Step 2 If you do not know the line number you want to configure, enter the dsplns command to display a list of the lines:

mgx8830b.2.PXM.a > dsplns

Remember that you cannot configure a line until you have brought it up as described in the previous section, " Bringing Up Lines."

Step 3 To display the configuration for a T1 line, enter the dspln -ds1 <bay.line> command. Replace bay with the bay number 2, since the PXM1E interface back card is always in the lower bay. Replace line with number of the interface you want to configure. The following example shows the configuration displayed for a T1 line:

pxm1e58.1.PXM.a > dspln -ds1 2.1
Line Number : 2.1
Admin Status : Down Alarm Status : Clear
Line Type : dsx1ESF Number of ports : 0
Line Coding : dsx1B8ZS Number of partitions: 0
Line Length(meters) : 40 Number of SPVC : 0
Loopback : NoLoop Number of SPVP : 0
Xmt. Clock source : localTiming Number of SVC : 0
Valid Intervals : 0

For more information, see the " Verifying Line Configuration" section later in this chapter.

Step 4 To configure a T1 (DS1) line, enter the following commands:

mgx8830b.2.PXM.a > cnfln -ds1 <bay.line> -len <LineLength> -clk <clockSource>

Table 4-1 describes the all parameters for configuring lines. Be sure to use only the parameters listed for T1 lines.

Step 5 To verify your configuration changes, enter the dspln command.

Configuring E1 Lines

At the physical level, you can configure the line clock source for E1 lines. The following procedure describes how to configure E1 lines.

Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.

Step 2 If you do not know the line number you want to configure, enter the dsplns command to display a list of the lines:

mgx8830b.2.PXM.a > dsplns

Remember that you cannot configure a line until you have brought it up as described in the section, " Bringing Up Lines."

Step 3 To display the configuration for a line, enter the dspln -e1 <bay.line> command. Replace bay with the number 2 to indicate the PXM1E interface back card in the lower bay. Replace line with number of the interface you want to configure. The following example shows the configuration displayed for an E1 line:

pxm1e58.1.PXM.a > dspln -e1 2.1
Line Number : 2.1
Admin Status : Down Alarm Status : Clear
Line Type : dsx1ESF Number of ports : 0
Line Coding : dsx1B8ZS Number of partitions: 0
Loopback : NoLoop Number of SPVC : 0
Xmt. Clock source : localTiming Number of SPVP : 0
Valid Intervals : 0 Number of SVC : 0

For more information, see the " Verifying Line Configuration" section later in this chapter.

Step 4 To configure an E1 line, enter the following commands:

mgx8830b.2.PXM.a > cnfln -e1 <bay.line> -clk <clockSource>

Table 4-1 describes the all the parameters for configuring lines. Be sure to use only the parameters listed for E1 lines.

Step 5 To verify your configuration changes, enter the dspln command.

Configuring SONET Lines

At the physical level, you can configure the line clock source for SONET lines. The following procedure describes how to configure SONET lines.

Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.

Step 2 If you do not know the line number you want to configure, enter the dsplns command to display a list of the lines:

mgx8830b.2.PXM.a > dsplns

Remember that you cannot configure a line until you have brought it up as described in the previous section, " Bringing Up Lines."

Step 3 To display the configuration for a line, enter the dspln command. For example:

mgx8830b.2.PXM.a > dspln -sonet 2.1
Line Number : 2.1
Admin Status : Up Alarm Status : Clear
Loopback : NoLoop APS enabled : Enable
Frame Scrambling : Enable Number of ports : 1
Xmt Clock source : localTiming Number of partitions: 1
Line Type : sonetSts3c Number of SPVC : 0
Medium Type(SONET/SDH) : SONET Number of SPVP : 0
Medium Time Elapsed : 623 Number of SVC : 0
Medium Valid Intervals : 72
Medium Line Type : ShortSMF

For more information, see the " Verifying Line Configuration" section later in this chapter.

Step 4 To configure a SONET line, enter the following commands:

mgx8830b.2.PXM.a > cnfln -sonet <bay.line> -slt <LineType> -clk <clockSource>

Table 4-1 describes the parameters for configuring lines. Be sure to use only the parameters listed for SONET lines.

Step 5 To verify your configuration changes, enter the dspln command.

Configuring T3 Lines

At the physical communications level, you can configure the following options for DS3 lines:

•Line type

•Line length (distance in meters)

•C-bit checking

•Line clock source

•Out of frame alarm criteria

•RcvFEACValidation

The following procedure describes how to configure T3 lines.

Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.

Step 2 If you do not know the line number you want to configure, enter the dsplns command to display a list of the lines.

mgx8830b.2.PXM.a > dsplns

Remember that you cannot configure a line until you have brought it up with the upln command, as described in the " Bringing Up Lines" section earlier in this chapter.

Step 3 To display the configuration for a line, enter the dspln command. For example:

mgx8830b.2.PXM.a > dspln -ds3 1.1
Line Number : 1.1
Admin Status : Up Alarm Status : Clear
Line Type : ds3cbitadm Number of ports : 1
Line Coding : ds3B3ZS Number of partitions: 0
Line Length(meters) : 0 Number of SPVC : 0
OOFCriteria : 3Of8Bits Number of SPVP : 0
AIS c-Bits Check : Check Number of SVC : 0
Loopback : NoLoop
Xmt. Clock source : localTiming
Rcv FEAC Validation : 4 out of 5 FEAC codes

For more information, see the " Verifying Line Configuration" section later in this chapter.

Step 4 To configure a T3 line, enter the following command:

mgx8830b.2.PXM.a > cnfln -ds3 <bay.line> -len <LineLength> -clk <clockSource> -lt <LineType> -oof <OOFCriteria> -cb <AIScBitsCheck> -rfeac <RcvFEACValidation>

Table 4-1 lists the parameter descriptions for configuring lines. Be sure to use only the parameters listed for T3 lines.

Step 5 To verify your configuration changes, enter the dspln command.

Configuring E3 Lines

At the physical communications level, you can configure the Transmit clock source for E3 lines. The following procedure describes how to configure E3 lines.

Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.

Step 2 If you do not know the line number you want to configure, enter the dsplns command to display a list of the lines.

Step 3 To display the configuration for a line, enter the dspln command.

mgx8830b.2.PXM.a > dspln -e3 1.1

Remember that you cannot configure a line until you have brought it up with the upln command, as described in the " Bringing Up Lines" section earlier in this chapter.

Step 4 To configure an E3 line, enter the following command:

8mgx8830b.2.PXM.a > cnfln -e3 <bay.line> -clk <clockSource>

Table 4-1 lists the parameter descriptions for configuring SONET, DS3 and E3 lines. Be sure to use only the parameters listed for E3 lines.

Step 5 To verify your configuration changes, enter the dspln command.

Verifying Line Configuration

To display the configuration of a line, use the following procedure.

Step 1 Establish a CLI management session at any user access level.

Step 2 If you do not know the line number you want to view, display a list of the lines by entering the following command:

mgx8830b.2.PXM.a > dsplns

Step 3 To display the configuration of a single line, enter the following command:

mgx8830b.2.PXM.a > dspln -type <bay.line>

Table 4-2 describes the dspln command parameters. The line configuration appears as follows:

mgx8830b.2.PXM.a > dspln -sonet 2.1
Line Number : 2.1
Admin Status : Up Alarm Status : Clear
Loopback : NoLoop APS enabled : Enable
Frame Scrambling : Enable Number of ports : 1
Xmt Clock source : localTiming Number of partitions: 1
Line Type : sonetSts3c Number of SPVC : 0
Medium Type(SONET/SDH) : SONET Number of SPVP : 0
Medium Time Elapsed : 80 Number of SVC : 0
Medium Valid Intervals : 73
Medium Line Type : ShortSMF

Table 4-2 dspln Command Parameters

Parameter

Description

type

The parameter specifies the type of line that is connected to the switch. Replace <type> with -ds1, -e1, -ds3, -e3, or -sonet. Use the dsplns command to view the configured line type in the Line Type column.

bay

Replace <bay> with 2 to indicate that the line is connected to a PXM1E back card in the lower bay.

line

Replace <line> with the number that corresponds to the line for which you want to display information.

Establishing Redundancy Between Two Lines with APS

Intracard and intercard APS line redundancy is introduced in Planning Standalone and Redundant Line Configurations, which appears in "Planning for Card Redundancy, Line Redundancy, and Bulk Distribution." The sections that follow describe how to configure these types of APS lines.

Note APS is supported only on OC-3/STM-1 line speeds. APS is not supported on T1, E1,T3, or E3 lines.

Configuring Intracard APS Lines

To establish redundancy between two lines on the same card, use the following procedure.

Step 1 Establish a configuration session using a user name with GROUP1_GP privileges or higher.

Step 2 If you have not done so already, bring up the working line as described in " Bringing Up Lines," which appears earlier in this chapter.

Step 3 Enter the addapsln command as follows:

mgx8830b.2.PXM.a > addapsln <workingIndex> <protectIndex> <archmode>

Replace <workingIndex> with the location of the working line using the format slot.bay.line. For example, to specify the line on card 2, bay 2, line 2, enter 2.2.2.

Replace <protectIndex> with the location of the protection line, using the same format used for the working line.

Note With intracard APS, the slot number for the working index and protection index is the same.

Replace <archmode> with the option number that selects the APS architecture mode. Table 4-3 shows the option numbers and the architecture modes they select.

Table 4-3 APS Line Architecture Modes

Option

Description

1

Selects 1+1 Bellcore GR-253 APS protocol signaling (transmission on both working and protection lines).

2

Selects 1:1 Bellcore GR-253 APS protocol signaling (transmission on either the working line or the protection line) for intracard APS.

3

Selects 1+1 ITU-T G.783 AnnexB APS protocol signaling (transmission on both working and protection lines).

4

Selects 1+1 Y-cable signaling without K1 and K2. This option is not supported for intercard or intracard APS in this release.

5

Selects 1+1 straight cable signaling without K1 and K2.

The following example assigns 1+1 APS redundancy to two lines on the same card:

mgx8830b.2.PXM.a > addapsln 2.2.1 2.2.2 1

Step 4 To display a list of all APS lines on a PXM1E, enter the dspapslns command on the active PXM1E card.

Step 5 To display information on a specific APS line, enter the dspapsln <slot.bay.line> command on the active PXM1E card.

For information on managing APS lines, see the " Managing Redundant APS Lines" section in Chapter 13, "Switch Operating Procedures."

Configuring Intercard APS Lines

To establish redundancy between two lines on different cards, use the following procedure.

Note For intercard APS to operate properly, an APS connector may need to be installed between the two cards. Table 2-4 in "Planning for Card Redundancy, Line Redundancy, and Bulk Distribution," lists which cards require an APS connector. For more information on the APS connector and how to install it, refer to the Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, and Cisco MGX 8830 Hardware Installation Guide.

Step 1 Establish a configuration session using a user name with GROUP1_GP privileges or higher.

Step 2 If you have not done so already, bring up the working line as described in the " Bringing Up Lines" section.

Step 3 Ensure that the cards you are working on are functioning as a redundant pair.

Step 4 If an APS connector is required for your configuration, enter the dspapsbkplane command on both the standby and active cards to verify that the APS connector is installed properly.

Note This command can show different values for each of the two cards, which indicates the APS connector is seated properly on one card, but not on the other.

Step 5 Enter the addapsln command as follows:

mgx8830b.2.PXM.a > addapsln <workingIndex> <protectIndex> <archmode>

Replace <workingIndex> with the location of the working line using the format slot.bay.line. For example, to specify line 1 on the card in slot 2 of the lower bay, enter 2.2.1.

Replace <protectIndex> with the location of the protection line, using the same format used for the working line.

Note For intercard redundancy, the working index and protection index must specify the same line numbers on different cards. Also, the working line index must identify a line on the primary card.

Replace <archmode> with an option number that defines the type of line redundancy you want to use. Table 4-3 shows the option numbers and the types of redundancy they select.

The following example assigns 1+1 APS redundancy to lines on different cards:

mgx8830b.2.PXM.a > addapsln 1.2.2 2.2.2 1

Step 6 To display a list of all the APS lines on an PXM1E card, enter the dspapslns command.

Step 7 To display information on a specific APS line, enter the dspapsln <slot.bay.line> command on the active PXM1E card.

For information on managing APS lines, see the " Managing Redundant APS Lines" section in Chapter 13, "Switch Operating Procedures."

	Command	Purpose
Step 1	username <password>	Start a configuration session. Note To perform all the steps in this quickstart procedure, you must log in as a user with GROUP1 privileges or higher.
Step 1	cnfcdmode <mode>	Configure the operational mode of all lines on PXM1E cards that support T1, E1, T3 or E3 lines. This step selects either T1 or E1, or either T3 or E3, depending on the card type. Note You need to configure the card mode before you provision connections on the PXM1E card.
Step 2	upln <bay.line> Related commands: dsplns dspln -type <bay.line>	Bring up and configure lines. This step establishes physical layer connectivity between two switches. See the " Setting Up Lines" section later in this chapter.
Step 3	cnfln <options> Related commands: dsplns dspln -type <bay.line>	Configure lines if the default configuration parameters must be changed. See the " Configuring Lines" section later in this chapter.
Step 4	addapsln <workingIndex> <protectIndex> <archmode> dspapslns dspapsln working-slot.bay.line>	Configure a redundant relationship between two PXM1E lines. See the " Establishing Redundancy Between Two Lines with APS" section later in this chapter.

Parameter	Line Types Supported	Description
AIScBitsCheck	T3	The -cb option defines C-bit checking. Set <AIScBitsCheck> to 1 to enable C-bit checking. Set it to 2 to ignore the C-bit.
bay.line	T1 E1 T3 E3 SONET	Replace bay with 2 to specify that the line is connected to a PXM1E back card in the uplink bay. Replace line with the number that corresponds to the line you want to configure.
clockSource	T1 E1 T3 E3 SONET	The -clk option selects the source timing for transmitting messages over the line. Replace <clockSource> with 1 to use the clock signal received over this line from a remote node, or specify 2 to use the local timing defined for the local switch.
LineLength	T1 T3	The -len option specifies the length of a line from the local node to a remote node in meters. Enter a value from 0 to 64000 meters.
LineType	SONET	Enter -slt 1 for SONET or -slt 2 for SDH.
LineType	T3	Enter -lt 1 for ds3cbitadm or -lt 2 for ds3cbitplcp.
OOFCriteria	T3	Out of Frame (OOF) alarm criteria. Replace <OOFCriteria> with 1 to select 3 out of 8 and 2 to select 3 out of 16.
RcvFEACValidation	T3	Replace <RcvFEACValidation> with 1 to select 4 out of 5 and 2 to select 8 out of 10.

Parameter	Description
type	The parameter specifies the type of line that is connected to the switch. Replace <type> with -ds1, -e1, -ds3, -e3, or -sonet. Use the dsplns command to view the configured line type in the Line Type column.
bay	Replace <bay> with 2 to indicate that the line is connected to a PXM1E back card in the lower bay.
line	Replace <line> with the number that corresponds to the line for which you want to display information.

Option	Description
1	Selects 1+1 Bellcore GR-253 APS protocol signaling (transmission on both working and protection lines).
2	Selects 1:1 Bellcore GR-253 APS protocol signaling (transmission on either the working line or the protection line) for intracard APS.
3	Selects 1+1 ITU-T G.783 AnnexB APS protocol signaling (transmission on both working and protection lines).
4	Selects 1+1 Y-cable signaling without K1 and K2. This option is not supported for intercard or intracard APS in this release.
5	Selects 1+1 straight cable signaling without K1 and K2.