Network Router User Manual

ManualsBrandsCisco Systems ManualsNetwork RouterROUTER MODULAR SERVICES CARD AND SHARED PORT ADAPTER SOFTWARE 7304

CHAPTER

13-1

Cisco 7304 Router Modular Services Card and Shared Port Adapter Software Configuration Guide

OL-4807-02

Configuring the 2-Port and 4-Port T3/E3 SPAs

This chapter provides information about configuring the 2-Port and 4-Port T3/E3 Shared Port Adapters

(SPAs) on the Cisco 7304 router. It includes the following sections:

• Configuration Tasks, page 13-1

• Verifying the Interface Configuration, page 13-17

• Configuration Examples, page 13-19

For information about managing your system images and configuration files, refer to the Cisco IOS

Configuration Fundamentals Configuration Guide, Release 12.2 and Cisco IOS Configuration

Fundamentals Command Reference, Release 12.2 publications.

For more information about the commands used in this chapter, see Chapter 18, “Command Reference,”

in this guide, which documents new and modified commands. Also refer to the related Cisco IOS

Release 12.2 software command reference and master index publications. For more information about

accessing these publications, see the “Related Documentation” section on page -xiv section of this

document.

Configuration Tasks

This section describes how to configure the 2-Port or 4-Port T3/E3 SPA for the Cisco 7304 router and

includes information about verifying the configuration.

It includes the following topics:

• Required Configuration Tasks, page 13-2

• Specifying the Interface Address on a SPA, page 13-5

• Optional Configurations, page 13-5

• Saving the Configuration, page 13-17

Summary of content (22 pages)

PAGE 1
C H A P T E R 13 Configuring the 2-Port and 4-Port T3/E3 SPAs This chapter provides information about configuring the 2-Port and 4-Port T3/E3 Shared Port Adapters (SPAs) on the Cisco 7304 router.
PAGE 2
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Required Configuration Tasks This section lists the required configuration steps to configure the 2-Port or 4-Port T3/E3 SPA. Some of the required configuration commands implement default values that might be appropriate for your network. If the default value is correct for your network, then you do not need to configure the command.
PAGE 3
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Configure the Interface To set the ip address for the 2-Port or 4-Port T3/E3 SPA, complete these steps: Step 1 Command Purpose Router(config)# interface serial slot/subslot/port Selects the interface to configure and enters interface configuration mode. • Step 2 Step 3 Router(config-if)# ip address address mask Router(config-if)# clock source {internal | line} slot/subslot/port—Specifies the location of the interface.
PAGE 4
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks 0 C-bit Coding Violation, 0 P-bit Err Secs, 0 P-bit Sev Err Secs, 0 Sev Err Framing Secs, 0 Unavailable Secs, 24750 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs Transmitter is sending AIS. Receiver has loss of signal.
PAGE 5
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Serial6/0/0.16 is up, line protocol is up Hardware is SPA-4T3E3 Internet address is 110.1.1.2/24 MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, reliability 255/255, txload 11/255, rxload 53/255 Encapsulation FRAME-RELAY Specifying the Interface Address on a SPA SPA interface ports begin numbering with “0” from left to right. Single-port SPAs use only the port number 0.
PAGE 6
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Configuring Data Service Unit Mode Configure the SPA to connect with customer premise Data Service Units (DSUs) by setting the DSU mode. Subrating a T3 or E3 interface reduces the peak access rate by limiting the data transfer rate. To configure the DSU mode and bandwidth, use the following commands: Command Purpose Router# configure terminal Enters global configuration mode.
PAGE 7
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Command Purpose Router(config-if)# dsu bandwidth kbps Specifies the allowable bandwidth. • kbps—The bandwidth range and increment values are based on the specific DSU. Default for T3 mode is 44010 kbps and 34010 kbps for E3 mode.
PAGE 8
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks 0 Data 0 0 0 0 0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs in Interval 1: Line Code Violations, 0 P-bit Coding Violation C-bit Coding Violation P-bit Err Secs, 0 P-bit Sev Err Secs Sev Err Framing Secs, 0 Unavailable Secs Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs . . .
PAGE 9
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Command Purpose Router(config-if)# mdl [string {eic | fic | generator | lic | pfi | port | unit} string}] | [transmit {idle-signal | path | test-signal}] Configures the Maintenance Data Link (MDL) message. • eic string—Equipment identification code (up to 10 characters), which is a value used to describe a specific piece of equipment according to ANSI T1.107-1995.
PAGE 10
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Verifying MDL Use the show controllers serial command to display the MDL settings: router# show controllers serial 6/0/0 Serial6/0/0 Framing is c-bit, Clock Source is Line Bandwidth limit is 44210, DSU mode 0, Cable length is 10 rx FEBE since last clear counter 2, since reset 0 Data in current interval (546 seconds elapsed): 0 Line Code Violations, 0 P-bit Coding Violation 0 C-bit Coding Violation 0 P-bit Err Secs, 0 P-bit Sev Er
PAGE 11
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Scrambling can prevent some bit patterns from being mistakenly interpreted as alarms by switches placed between the Data Service Units (DSUs). To configure scrambling, use the following commands: Command Purpose Router# configure terminal Enters global configuration mode. Router(config)# interface serial slot/subslot/port Selects the interface to configure.
PAGE 12
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Configuring Framing Framing is used to synchronize data transmission on the line. Framing allows the hardware to determine when each packet starts and ends. To configure framing, use the following commands. Command Purpose Router# configure terminal Enters global configuration mode. Router(config)# interface serial slot/subslot/port Selects the interface to configure.
PAGE 13
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Configuring Encapsulation When traffic crosses a WAN link, the connection needs a Layer 2 protocol to encapsulate traffic. To set the encapsulation method, use the following commands: Command Purpose Router# configure terminal Enters global configuration mode. Router(config)# interface serial slot/subslot/port Selects the interface to configure.
PAGE 14
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Configuring Cable Length The cablelength command compensates for the loss in decibels based on the distance from the device to the first repeater in the circuit. A longer distance from the device to the repeater requires that the signal strength on the circuit be boosted to compensate for loss over that distance.
PAGE 15
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Configuring Invert Data Delays between the TE clock and data transmission indicate that the transmit clock signal might not be appropriate for the interface rate and length of cable being used. Different ends of the wire may have variances that differ slightly. Invert the clock signal to compensate for these factors.
PAGE 16
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Tasks Command Purpose Router# configure terminal Enters global configuration mode. Router(config)# interface serial slot/subslot/port Selects the interface to configure and enters interface configuration mode. • slot/subslot/port—Specifies the location of the interface.
PAGE 17
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Verifying the Interface Configuration Saving the Configuration To save your running configuration to nonvolatile random-access memory (NVRAM), use the following command in privileged EXEC configuration mode: Command Purpose Router# copy running-config startup-config Writes the new configuration to NVRAM. For more information about managing configuration files, refer to the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.
PAGE 18
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Verifying the Interface Configuration Monitoring Per-Port Interface Statistics To find detailed status and statistical information on a per-port basis for the 2-Port or 4-Port T3/E3 SPA, use the show controllers serial command. For a description of the command output, see Chapter 18, “Command Reference.
PAGE 19
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Examples No FEAC code is being received MDL transmission is disabled Configuration Examples This section includes the following configuration examples: • DSU Configuration Example, page 13-19 • MDL Configuration Example, page 13-19 • Scrambling Configuration Example, page 13-20 • Framing Configuration Example, page 13-20 • Encapsulation Configuration Example, page 13-20 • Cable Length Configuration Example, page 13-20 • In
PAGE 20
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Examples Router(config-if)# mdl transmit path Router(config-if)# mdl transmit idle-signal Router(config-if)# mdl transmit test-signal Scrambling Configuration Example The following example configures scrambling on the T3/E3 interface: ! Enter global configuration mode ! Router# configure terminal ! ! Specify the serial interface and enter interface configuration mode ! Router(config)# interface serial 4/1/3 ! ! Enable scrambling ! Rou
PAGE 21
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Examples ! Specify the cable length ! Router(config-if)# cablelength 200 Invert Data Configuration Example The following example enables invert data: ! Enter global configuration mode ! Router# configure terminal ! ! Specify the serial interface and enter interface configuration mode ! Router(config)# interface serial 4/1/3 ! ! Enable invert data ! Router(config-if)# invert data Trace Trail Buffer Configuration Example The following e
PAGE 22
Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs Configuration Examples Cisco 7304 Router Modular Services Card and Shared Port Adapter Software Configuration Guide 13-22 OL-4807-02