Cisco MGX-FRSM-2CT3 Manuale utente

CHAPTER

Card and Service Configuration 6-1

Card and Service Configuration

This chapter describes how to configure the MGX 8850 cards and the services they support.

Although the presumption for this chapter is that a plan exists for your network, it reviews some of

the information that supports network planning. Generic instructions for inserting and removing

cards appear in “Chapter 4, “Enclosure and Card Installation.”

The services and applicable modules described in this chapter are:

•Physical and logical configuration of a broadband interface on the Processor Switching Module

(PXM) and, for a stand-alone switch, connection addition

•ATM service on the MGX-AUSM/B

•Frame Relay service on the following service modules:

MGX-FRSM-2CT3

MGX-FRSM-2T3E3

MGX-FRSM-HS2

MGX-FRSM-HS1/B

AX-FRSM-8T1 and AX-FRSM-8E1

•Circuit emulation service on the MGX-CESM-8T1 and MGX-CESM-8E1

•Redundancy and bulk distribution on the Service Resource Module-3T3 (MGX-SRM-3T3/B)

Note For information on the Route Processor Module (RPM), see the Cisco Route Processor

Module Installation and Configuration Guide.

Tasks for Configuring Cards and Services

This section contains a general description of the sequence of tasks for configuring the cards and

their services. It also contains details on how to configure resource partitions and add local

connections and three-segment connections. Detailed descriptions of these tasks for individual cards

appear in subsequent sections.

Modifying the Resource Partitioning

A resource partition at the card level consists of a number of logical connections (LCNs). At the port

level, a resource partition consists of a percentage of bandwidth, a DLCI or VPI/VCI range, and the

number of logical connection numbers (LCNs) available to a network control application. On the

Tasks for Configuring Cards and Services

Cisco MGX 8850 Installation and Configuration, Release 1.1.00, Part Number 78-6186-02

6-2

PXM, the connections are global logical connections (GLCNs). By default, all resources on a a card

or logical port are available to any controller on a first-come, first-served basis. If necessary, you can

modify the resource partitioning at the card level or logical port level. Port-level resource

modification follows card-level modification, so the available port-level resources depend on

whether and how much you change the card-level resource partitioing. You do not have to change

the resource partitioning for the card before changing resource partitioning for a port.

The current network control application is Portable AutoRoute (PAR). Planning considerations

should include the possibility of modifying the partitioning of resources for the interface. For

example, the MGX 8850 switch has the capacity to support a Cisco Multi-Protocol Label Switching

(MPLS) controller or a Private Network to Network Interface (PNNI) controller.

Sequence of Configuration Tasks

In a new switch, the common approach is to configure the same aspect for all cards at once—adding

logical ports to all applicable cards, for example. In contrast, the likely sequence for installing a

single card is to begin with its card-level features and continue until you have configured every

connection. The common tasks for a new switch are:

1Optionally configure the service modules (except the RPM) for redundancy. This card-level

operation requires redundant cards and possibly an MGX-SRM-3T3/B.

2Optionally configure resource partitioning for the whole card if the default partitioning does not

fulfill the purpose of the card.

3Activate physical lines.

4Configure the line if default parameters are not appropriate.

5Create the logical ports then modify them as needed.

6Optionally configure resource partitions for a logical port if the default partitioning does not

support the intended operation of the port.

7Add connections then modify them as needed.

Rules for Adding Connections

This section describes the rules for adding local connections, three-segment connections, and

management connections. The MGX 8850 switch can support:

•Local-only, digital access and cross-connect (DAX) connections

•Three-segment connections across an ATM or Frame Relay network

•IP management connections (stand-alone switches only)

A management connection is an inband IP connection that lets a workstation control a local or

remote MGX 8850 switch through a service module rather than the Ethernet port on a PXM-UI.

Although the rules include references to CLI syntax, they also apply to the Cisco WAN Manager

application.

Card and Service Configuration 6-3

Rules for Adding Connections

Rules for Adding a DAX Connection

A DAX con is a connection whose endpoints for the entire connection exist on the same switch. The

following apply to the MGX 8850 switch:

1On a feeder, a DAX con can exist between different service modules or the same service module.

2A stand-alone node supports DAX cons with one or both endpoints on the PXM in addition to

DAX cons between service modules.

3Either endpoint can be the master.

4The first endpoint to add is the slave. The generic syntax is:

addcon <local parameters>

where local parameters are the port, DLCI or VPI and VCI, and mastership status. Slave is the

default case, so you actually do not explicitly have to specify it. When you press Return, the

system returns a connection identifier. The identifier includes the port and DLCI or VPI and VCI.

Use the identifier to specify the slave endpoint when you subsequently add the connection at the

master end. The slave endpoint is specified as the remote parameters in item 5.

5To complete the DAX con, add the master endpoint. The generic syntax is

addcon <local parameters> <remote parameters>

where local parameters are the port, DLCI or VPI and VCI, and mastership status (master in this

case). The remote parameters are the items in the connection identifier that the system returned

when you added the slave endpoint.

6If the endpoint is a PXM port in a stand-alone node, specify the slot as 0. The addcon command

is the only command in which you specify the slot number for the PXM as 0.

Rules for Adding Three-Segment Connections

A three-segment connection consists of a local segment on each MGX 8850 switch at the edges of

the network cloud and a middle segment across the network cloud. The MGX 8850 requirements are:

1For MGX 8850 feeders, the backbone must consist of BPX 8600-series switches.

2For MGX 8850 stand-alone switches, the backbone switches can be either BPX 8600-series

switches or switches from another manufacturer.

3On a feeder, the local segment exists between a service module and the PXM.

4On a stand-alone node, the local segment can be between a service module and a port on the PXM

or just two ports on the PXM.

5For the local segment, add the connection at only the master endpoint. The generic syntax is:

addcon <local parameters> <remote parameters>

where local parameters are the port, DLCI or VPI and VCI, and mastership status (master in this

case). The remote parameters are the current nodename, slot, port, and VPI and VCI of the slave

end. For the PXM endpoints, specify the slot number as 0. The addcon command is the only

command in which you specify the slot number for the PXM as 0.

Tasks for Configuring Cards and Services

Cisco MGX 8850 Installation and Configuration, Release 1.1.00, Part Number 78-6186-02

6-4

Rules for Adding Management Connections

This section describes the requirements for adding an inband ATM PVC for managing an MGX 8850

stand-alone node. A management connection lets a workstation connected through a router control

either the local MGX 8850 node or a remote MGX 8850 node that has no workstation. The typical

configuration has the connecting router feed an AUSM/B, FRSM, RPM, or PXM UNI port.

A management connection can be either a DAX con or a three-segment connection. The maximum

number of management connections is eight. The DAX con exists between a service module or PXM

UNI and port 34 of the local PXM. PXM port 34 is a reserved port for management connections on

a stand-alone node. The network in Figure 6-1 shows FRSMs in a feeder application.

A three-segment management connection has a:

1Local segment between a near-end service module or PXM UNI and a PXM port in the

range 1–32.

2Middle segment across the network cloud.

3Local segment between a remote PXM port in the range 1–32 and port 34 of that same PXM.

The path from “A” to “B” in Figure 6-1 consists of three segments. A segment exists between the

FRSM and the PXM on each MGX 8850 switch. The middle segment exists between the BXMs at

the edges of the ATM cloud and may traverse BPX 8600 via nodes in the cloud. The VPI and VCI

at each BPX8600-series switch connected to an MGX 8850 feeder must match the VPI and VCI on

the slave endpoint of the connected PXM. The VPIs and VCIs at the endpoints of the middle segment

do not have to match. If you use the CLI rather than the Cisco WAN Manager application, add each

segment through the CLI at each switch.

Figure 6-1 Frame Relay Connection Through an MGX 8850-BPX 8600-Series Network

BPX 8620

Backbone

Network

BPX

8620

Port

Channel

BPX

8620

Port T1

Channel B

Customer Equipment

to BPX 8620

Customer Equipment

to BPX 8620

BPX 8620 to BPX 8620

BXM-8-155

17910

MGX

8850

MGX

8850

Card and Service Configuration 6-5

The Processor Switching Module

This section first describes how to activate and configure the card-level parameters, lines, and ports

on the PXM uplink card then describes how to add connections to the PXM in a stand-alone node.

The descriptions tell you how to:

•Optionally modify the resource partitioning at the card level.

•Activate a line on the uplink card. On a stand-alone node, you can activate more than one line if

the uplink card has multiple lines. One physical line must be the trunk to a network routing node.

•If the switch has a pair of SRMs for bulk distribution and you use the CLI rather than the

CiscoView application, activate the SRM lines from the PXM.

•Optionally modify the resource partitioning at the port level.

•Create logical ports.

•On a stand-alone node, specify the cell header type. UNI cell headers typically apply where a

workstation connects to a UNI port on the uplink card rather than a port on the PXM-UI card.

Such an implementation is not common.

•On a stand-alone node, add standard connections and optional management connections.

•On a stand-alone node, configure Automatic Protection Switching (APS).

•For a feeder, execute steps on the connected BPX 8600-series switch to make the feeder an

available resource in the network.

Note For a description of the bit error rate test (BERT) functions, see the section titled “Bit Error

Rate Testing Through an MGX-SRM-3T3.”

The Processor Switching Module

Cisco MGX 8850 Installation and Configuration, Release 1.1.00, Part Number 78-6186-02

6-6

Configuring Card-Level Parameters, Lines, and Ports

This section describes how to configure card-level features, activate a physical line, and configure

logical elements such as a port. If necessary, refer to the section titled “Tasks for Configuring Cards

and Services” for background information on these types of tasks.

Step 1 Optionally, you can modify the resource partitioning for the whole card by executing

cnfcdrscprtn. You can view resource partitioning through dspcdrscprtn.

cnfcdrscprtn <number_PAR_conns> <number_PNNI_conns> <number_TAG_conns>

•number_PAR_conns is the number of connections in the range 0–32767 for PAR.

•number_PNNI_conns is the number in the range 0–32767 available to PNNI.

•number_TAG_conns is the number of connections in the range 0–32767 for MPLS.

For example, you could reserve 10,000 connections for each controller on the PXM with:

cnfcdrscprtn 10000 10000 10000

Step 2 Activate a line by executing addln:

addln -ds3 <slot.line> | -e3 <slot.line> | -sonet <slot.line>

•-ds3 indicates a T3 line parameter follows.

•-e3 indicates an E3 line parameter follows.

•-sonet indicates an OC-3 or OC-12 line parameter follows.

•slot is 7 or 8 for the PXM. If the switch has a single of redundant pair of SRMs,

execute addln for slots 15, 16, 31, and 32.

•line has the range 1–4 but depends on the number of lines on the back card.

For a feeder, you can activate only one line. For a stand-alone, you can activate more than

one line if the back card has multiple lines. One line must serve as the trunk to the ATM

network. With an OC-3, T3, or E3 card, remaining lines can serve as UNI ports to CPE.

Step 3 If necessary, modify the characteristics of a line by using cnfln.

Step 4 Configure logical ports for the physical line by executing addport. Execute addport

once for each logical port. Related commands are cnfport, dspports, and delport.

addport <port_num> <line_num> <pct_bw> <min_vpi> <max_vpi>

•port_num is the number for the logical port. The range is 1–32 for user-ports or 34 for

inband ATM PVCs that serve as management connections.

•line_num is the line number in the range 1–4 but depends on the type of uplink card.

•pct_bw is the percentage of bandwidth. The range is 0–100. This parameter applies to

both ingress and egress.

•min_vpi is the minimum VPI value. On a feeder, the range is 0–4095. On a stand-alone

node, the range is 0–255.

•max_vpi is the maximum VPI value. On a feeder, the range is 0–4095. On a

stand-alone node, the range is 0–255.

Card and Service Configuration 6-7

Automatic Protection Switching on the PXM

Using an example of 100% of the bandwidth on one logical port 1:

addport 1 1 100 1 200

where the first “1” is the logical port number; the second “1” is the line number on the

PXM back card to which you are assigning this logical port number; “100” is the

percentage of bandwidth this port has in both directions; and the VPI range is 1–200.

Step 5 If necessary, use cnfportrscprtn to modify port-level resources for a controller:

cnfportrscprtn <port_no> <controller> <ingress_%BW> <egress_%BW>

•<min_VPI> <max_VPI> <min_VCI> <max_VCI> <max_GLCNs>

•port_no is the logical port number in the range 1–32 for user-connections or 34 for

inband ATM PVCs for network management.

•controller is a string identifying the network controller—”PAR,” “PNNI,” or “TAG.”

•ingress_%BW is the percentage of ingress bandwidth in the range 0–100.

•egress_%BW is the percentage of egress bandwidth in the range 0–100.

•min_vpi is the minimum VPI in the range 0–4095.

•max_vpi is the maximum VPI in the range 0–4095.

•min_vci is the minimum VCI in the range 0–65535.

•max_vci is the maximum VCI in the range 0–65535.

•max_chans is the maximum GLCNS in the range 0–32767.

Step 6 On a stand-alone node, specify the cell header type as needed by executing cnfatmln.

cnfatmln <line_num> <type>

•line_num is the line number in the range 1–4.

•type is either 2 for UNI or 3 for NNI (the default).

UNI cell headers typically apply where a workstation connects through a line to a PXM

UNI port (rather than a SLIP-based port on the PXM-UI card). Such an implementation

is not common, so cnfatmln usually is not necessary.

Automatic Protection Switching on the PXM

Automatic Protection Switching (APS) provides redundancy for an OC-3 or OC-12 line on the PXM

if a failure occurs someplace other than the PXM front card. The failure can originate on the daughter

card, uplink card, or any part of the physical line. With APS, the active PXM remains active and

passes the cells from the failed line-path through the redundant line. The advantage of APS is that a

line switchover requires significantly less time than a full PXM switchover. (A failure of the PXM

front card in a redundant system causes the entire PXM card set to switch over.) As defined in

GR-253, a variety of APS modalities are possible (see the command summaries that follow).

The current requirements for APS service on an MGX 8850 switch are:

•Redundant PXMs (currently, the PXM does not support an APS configuration where the working

and protection lines on the same uplink card).

•A “B” version of an OC-3 or OC-12 back card (SMLR-1-622/B, and so on).

•The connected network switch or CPE must also support APS.

The Processor Switching Module

Cisco MGX 8850 Installation and Configuration, Release 1.1.00, Part Number 78-6186-02

6-8

Initial APS specification consists of the working and protection slot and line and the mode for APS.

After the initial APS specification, you can configure additional APS parameters, give commands

for switching lines, and display the APS configuration. The CiscoView application and CLI provide

access to the APS feature. For detailed descriptions of the CLI commands, see the Cisco MGX 8850

Wide Area Edge Switch Command Reference. Note that APS is available for only the “B” versions

of the SONET cards—SMLR-1-622/B, and so on. The applicable CLI commands are:

•addapsln to specify the lines and mode for APS

•cnfapsln to modify the following details of APS operation:

—error thresholds

—wait period before the PXM restores the working line after errors clear

—unidirectional or bidirectional switchover, which specifies whether one or both directions of

a line are switched when the criteria for a hard or soft failure are met for one direction

—revertive recovery, where the working line automatically returns to operation after errors

clear and any wait period has elapsed

—enable use of K1 and K2 bytes in the line-level frame for equipment at both ends to exchange

APS-related information

•delapsln to delete the APS configuration

•dspapsln to display the configuration for an APS-configured line

•switchapsln to issue commands for line switching that:

—clear previous user requests

—lock out (block) line switching

—manually switch to the protection line if the following are true: no errors exist, the working

line is active, and your request has an equal or higher priority than the last switch request.

—force a line switch regardless of existing errors the following are true: the working line is

active and your request has an equal or higher priority than the last switch request.

—switch all traffic to either the working lines or protection lines so you can remove a card

(applies to only the currently supported configuration of 1+1 mode on two uplink cards)

To specify APS, use the following syntax:

addapsln <workline> <workingslot> <protectionline> <protectionslot> <archmode>

where workline and workingslot identify the line and slot of the APS working line, and protectionline

and protectionslot identify the protection line and slot. According to GR-253, the archmode

identifies the type of APS operation. The mode definition includes:

11+1 on one back card

21+1 on two back cards

31:1

4Annex B

Currently, the only supported mode is 1+1 with two uplink cards (mode=2). With 1+1 APS, both the

working line and the protection line carry duplicate data even though no error threshold has been

exceeded or line break has occurred. This mode requires that two standard cables (rather than a

Y-cable) connect at two ports on the equipment at the opposite end. With the two-card

implementation, workline must be the same as protectionline.

Card and Service Configuration 6-9

Adding Connections on a PXM in a Stand-Alone Node

This section describes the CLI commands for provisioning connections on a PXM in a stand-alone

node. Connection addition abides by the rules for a standard connection or a management connection

in the form of either a three-segment connection or a DAX con. See “Rules for Adding Connections”

earlier in this chapter. In addition this section describes the commands for modifying certain features

for a connection and policing connections by way of usage parameter control.

The CLI commands correspond to functions in the Cisco WAN Manager application. The preferred

CLI command is addcon. (If the application requires NSAP addressing, use addchan to add the

connection and cnfchan if you need to modify it. Refer to the command reference for the syntax.)

In addition, On the PXM CLI:

Step 1 Execute the addcon command according to the following syntax:

addcon <port_num> <conn_type> <local_VPI> <local_VCI> <service> [CAC]

[mastership] [remoteConnId]

•port_no is the logical port in the range 1–32 for a user connection or 34 for

management connection.

•conn_type is a number identifying the connection type—1 for VPC or 2 for VCC.

•local_VPI is the local VPI in the range 0–4095.

•local_VCI is the local VCI in the range 0–65535.

•service is a number in the range 1–4 to specify the type of service: 1=CBR, 2=VBR,

3=ABR, and 4=UBR.

•CAC optionally lets you turn off the addition of the loading affect of a connection to

the aggregated load on a port.

•mastership specifies whether the endpoint you are adding is the master or slave.

1=master. 2=slave (default). The syntax shows this parameter as optional because you

need to enter it at only the master end. Slave is the default, so you do not explicitly

need to specify it when entering a DAX con.

•remoteConnId identifies the connection at the slave end. The format for remoteConnId

is Remote_nodename.slot_num.remote_VPI.remoteVCI. Note that the slot number of

the active PXM is always 0 when you add a connection because the PXM slot number

is a fixed, logical value.

Step 2 If necessary, modify a connection by using cnfcon:

cnfcon <conn_ID> <route_priority> <max_cost> <restrict_trunk_type> [CAC]

•conn_ID identifies the connection. The format is logical_port.VPI.VCI.

•route_priority is the priority of the connection for re-routing. The range is 1–15 and

is meaningful only in relation to the priority of other connections.

•max_cost is a number establishing the maximum cost of the connection route. The

range is 1–255 and is meaningful only in relation to the cost of other connections for

which you specify a maximum cost.

•restrict_trunk_type is a number that specifies the type of trunk this connection can

traverse. The numbers are 1 for no restriction, 2 for terrestrial trunk only, and 3 for

satellite trunk only.

•CAC optionally lets you turn on or off the addition of the loading affect of a connection

to the aggregated load on a port.

The Processor Switching Module

Cisco MGX 8850 Installation and Configuration, Release 1.1.00, Part Number 78-6186-02

6-10

Step 3 As needed, specify usage parameter control according to the connection type. Use either

cnfupccbr, cnfupcvbr, cnfupcabr, or cnfupcubr. The following text lists the parameters

for each. Note that the parameters for cnfupcvbr and cnfupcabr are the same. Also, the

polType (policing type) parameter has numerous variations in accordance with ATM

Forum v4.0. For a list of the policing variations, see Table 6-1 after the syntax

descriptions.

cnfupccbr <conn_ID> <polType> <pcr[0+1]> <cdvt[0+1]> <IngPcUtil>

•conn_ID identifies the connection. The format is port.vpi.vci.

•polType is the policing type. The choices are 4 or 5. See Table 6-1 for a description of

these types.

•pcr is the peak call rate in the range 50–1412832 cps.

•cdvt is the cell delay variation tolerance in the range 1–5000000 microseconds.

•IngPcUtil is the percentage of utilization on the ingress. The range is 1–100.

•EgSrvRate is the egress service rate. The range is 50–1412832 cps.

•EgPcUtil is the percentage of utilization on the egress. The range is 1–100.

cnfupcvbr or cnfupcabr <conn_ID> <polType> <pcr[0+1] < cdvt[0+1]> <scr> <mbs>

•conn_ID identifies the connection. The format is port.vpi.vci.

•polType is the policing type in the range 1– 5. See Table 6-1 for a list of these types.

•pcr is the peak call rate in the range 50–1412832 cps.

•cdvt is the cell delay variation tolerance in the range 1–5000000 microseconds.

•scr is the sustained cell rate. The range is 50–1412832 cps.

•mbs is the maximum burst size. The range is 1–5000000 cells.

•IngPcUtil is the percentage of utilization on the ingress. The range is 1–100.

•EgSrvRate is the egress service rate. The range is 50–1412832 cps.

•EgPcUtil is the percentage of utilization on the egress. The range is 1–100.

cnfupcubr <conn_ID> <polType> <pcr[0+1] < cdvt[0+1]> <IngPcUtil>

•conn_ID identifies the connection. The format is port.vpi.vci.

•polType is the policing type. The range is 3– 5. See Table 6-1 for a list of these types.

•pcr is the peak call rate in the range 50–1412832 cps.

•cdvt is the cell delay variation tolerance in the range 1–5000000 microseconds.

•IngPcUtil is the percentage of utilization on the ingress. The range is 1–100.

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