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4-12

OC12 Packet Over SONET Line Card Installation and Configuration

OL-3437-01

Chapter 4 Configuring the OC12 POS Line Card

OC12 POS Statistics Counters

Router#

If the connection fails, verify that you have the correct IP address for the destination and that the device
is active (powered on), and repeat the ping command.

Using loopback Commands

The loopback test allows you to troubleshoot, detect, and isolate equipment malfunctions by testing the
connection between the OC-12 interface and a remote device. The loop subcommand places an interface
in internal loopback (also called local loopback) or line loopback mode, which enables test packets that
are generated from the ping command to loop through a remote device or a cable. If the packets complete
the loop, the connection is good. If not, you can isolate a fault to the remote device or the cable in the
path of the loopback test.

Configuring an Interface for Internal Loopback

The default loopback setting is for no loopback. With internal (or local) loopback, packets from the
router are looped back in the framer. Outgoing data gets looped back to the receiver without actually
being transmitted. Internal loopback is useful for checking that the OC12 POS line card is working.
To configure an interface for internal loopback, enter the loop internal command:

Router(config)#

interface

pos 3/0

Router(config-if)#

loop internal

To disable internal loopback, enter the no loop internal command.

Configuring an Interface for Line Loopback

The default loopback setting is for no loopback. With line loopback, the receive (RX) fiber is logically
connected to the transmit (TX) optical fiber cable so that packets from the remote router are looped back
to it. Incoming data gets looped around and retransmitted without actually being received. To configure
an interface for line loopback, enter the loop line command:

Router(config)#

interface

pos 3/0

Router(config-if)#

loop line

To disable line loopback, enter the no loop line command.

OC12 POS Statistics Counters

The OC12 POS line card maintains counts of certain errors. Each error counter is 32 bits. Errors include
the following:

•

CRC errors—Packet corrupted in reception

•

Giants received—Packet length too large (greater than MTU size)

•

Runts—Packet length too small (less than or equal to 4 bytes)

•

Ignores—No receive buffers available; receive buffers full

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Содержание 7300-1OC12POS-MM

Страница 1: ...sco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 526 4100 OC12 Packet Over SONET Line Card Installation and Configuration Product Numbers 7300 1OC12POS MM 7300 1OC12POS SMI 7300 1OC12POS SML 7300 2OC12POS MM 7300 2OC12POS SMI 7300 2OC12POS SML Platform Supported Cisco 7304 Text Part Number OL 3437 01 ...

Страница 2: ...sures Turn the television or radio antenna until the interference stops Move the equipment to one side or the other of the television or radio Move the equipment farther away from the television or radio Plug the equipment into an outlet that is on a different circuit from the television or radio That is make certain the equipment and the television or radio are on circuits controlled by different...

Страница 3: ...e 1 10 Cisco TAC Escalation Center 1 11 C H A P T E R 1 Overview 1 1 Line Card Overview 1 1 SONET SDH Overview 1 3 Features 1 4 Interface Specifications 1 4 OC12 POS Line Card Optical Fiber Specifications 1 5 LEDs 1 6 Alarms 1 7 Cables and Connectors 1 8 Encapsulation Method Support 1 9 Using Statistics to Estimate Link Loss and Power Budget 1 9 Slot Locations on the Cisco 7304 Router 1 10 Cisco 7...

Страница 4: ... a Line Card 3 4 Connecting OC12 POS Line Card Interface Cables 3 5 C H A P T E R 4 Configuring the OC12 POS Line Card 4 1 Using the EXEC Command Interpreter 4 1 Configuring the Interfaces 4 2 Performing a Basic Configuration 4 3 Customizing the Configuration 4 4 Setting the MTU Size 4 4 Configuring Framing 4 5 Setting the Source of the Transmit Clock 4 5 Configuring Cyclic Redundancy Checks 4 5 C...

Страница 5: ...ard Installation and Configuration OL 3437 01 Configuring an Interface for Internal Loopback 4 12 Configuring an Interface for Line Loopback 4 12 OC12 POS Statistics Counters 4 12 OC12 POS Line Card Error Messages 4 13 CLI Controlled OIR 4 13 ...

Страница 6: ...Contents 6 OC12 Packet Over SONET Line Card Installation and Configuration OL 3437 01 ...

Страница 7: ...2 port OC12 Packet over SONET POS line cards 7300 2OC12POS MM 7300 2OC12POS SMI and 7300 1OC12POS SML hereafter referred to as the OC12 POS line cards which are used in the Cisco 7304 router Organization This document contains the following chapters Section Title Description Chapter 1 Overview Describes the OC12 POS line cards and their LED displays cables and receptacles Chapter 2 Preparing for I...

Страница 8: ...nstallation and Configuration Guide Cisco 7304 Router Quick Start Guide For international agency compliance safety and statutory information for WAN interfaces Site Preparation and Safety Guide Regulatory Compliance and Safety Information for Cisco 7304 Routers To view Cisco documentation or obtain general information about the documentation refer to the following sources Obtaining Documentation s...

Страница 9: ...esentative by calling Cisco corporate headquarters California USA at 408 526 7208 or elsewhere in North America by calling 800 553 NETS 6387 Documentation Feedback If you are reading Cisco product documentation on Cisco com you can submit technical comments electronically Click Leave Feedback at the bottom of the Cisco Documentation home page After you complete the form print it out and fax it to ...

Страница 10: ...ng to the urgency of the issue Priority level 4 P4 You need information or assistance concerning Cisco product capabilities product installation or basic product configuration Priority level 3 P3 Your network performance is degraded Network functionality is noticeably impaired but most business operations continue Priority level 2 P2 Your production network is severely degraded affecting significa...

Страница 11: ...ied as priority level 1 or priority level 2 these classifications are assigned when severe network degradation significantly impacts business operations When you contact the TAC Escalation Center with a P1 or P2 problem a Cisco TAC engineer will automatically open a case To obtain a directory of toll free Cisco TAC telephone numbers for your country go to the following URL http www cisco com warp ...

Страница 12: ...12 OC12 Packet Over SONET Line Card Installation and Configuration OL 3437 01 Preface Obtaining Technical Assistance ...

Страница 13: ...ne Card Overview The OC12 POS line cards provide the Cisco 7304 router with single or dual 622 080 Mbps POS interfaces on a single card You must use the appropriate optical fiber cables to connect the OC12 POS line card with an external OC 12 network See the OC12 POS Line Card Optical Fiber Specifications section on page 1 5 and the Cables and Connectors section on page 1 8 for more information on...

Страница 14: ... Figure 1 4 7300 2OC12POS MM Faceplate View 7300 1OC POS MM 1 PORT OC12 POS MM OIR STATUS CARRIER ALARM ACTIVE LOOPBACK 70001 RX 0 TX 7300 1OC POS SMI 1 PORT OC12 POS SM I OIR STATUS CARRIER ALARM ACTIVE LOOPBACK RX 0 TX 70003 7300 1OC POS SML 1 PORT OC12 POS SM L OIR STATUS CARRIER ALARM ACTIVE LOOPBACK 70002 RX 0 TX 7300 2OC12POS MM 2 PORT OC 12 POS MM OIR STATUS CARRIER ALARM ACTIVE LOOPBACK 75...

Страница 15: ... standard rates and formats The basic rate for POS is that of STS 3c STM 1 which is 155 520 Mbps The available information bandwidth is 149 760 Mbps which is the STS 3c STM 1 Synchronous Payload Envelope SPE the payload portion of the SONET frame into which the octet oriented user data is mapped Octet boundaries are aligned with the SPE octet boundaries The International Telecommunication Union Te...

Страница 16: ... ITU T Recommendation G 707 Synchronous Digital Hierarchy Bit Rates June 1992 Telecordia GR 253 CORE SONET Common generic criteria September 2000 Features The OC12 POS line card has the following features Short reach 7300 1OC12POS MM and 7300 2OC12POS MM intermediate reach 7300 1OC12POS SMI and 7300 2OC12POS SMI and long reach 7300 1OC12POS SML and 7300 2OC12POS SML optical interface with single m...

Страница 17: ...ing on the entry angles which causes them to arrive at the destination at different times a phenomenon called modal dispersion therefore single mode fiber is capable of higher bandwidth and greater cable run distances than multimode fiber Table 1 1 lists nominal OC 12 optical parameters for single mode optical fiber transmission Note If the distance between two connected stations is greater than t...

Страница 18: ...LED goes on to indicate that power is received and that the OC12 POS line card is enabled for operation The following conditions must all be met before the OC12 POS line card is enabled The OC12 POS line card is correctly connected and receiving power The system bus recognizes the OC12 POS line card A valid version of microcode is loaded and running If any one of these conditions is not met or if ...

Страница 19: ...OPBACK Green Yellow Green Indicates that the port has been configured and is enabled Yellow Indicates that the port is in diagnostic loopback mode Off Indicates that the port has not been configured Table 1 2 OC12 POS Line Card LEDs continued LED Label Color State Function Table 1 3 Alarm Definitions Alarm Definition Section LOF loss of frame LOS loss of signal BIP B1 Bit Interleaved Parity N Line...

Страница 20: ...able 1 1 on page 1 5 Single mode optical fiber cables for the OC12 POS line card are not available from Cisco Systems they are available from commercial cable vendors Attach one pair of simplex fiber cables between the line card and the device to which the line card is connected Observe the receive RX and transmit TX cable relationship shown in Figure 1 10 Note For important laser safety informati...

Страница 21: ...get Statistical models more accurately determine the power budget than standard worst case methods Determining the link loss with statistical methods requires accurate knowledge of variations in the data link components Statistical power budget analysis is beyond the scope of this document For further information refer to ITU T standards and your equipment specifications The following publications...

Страница 22: ... for the OC12 POS line card in a Cisco 7304 router Interface addresses specify the actual physical location of each interface on a router The interfaces on the OC12 POS line card installed in a Cisco 7304 router maintain the same interface address regardless of whether other line cards are installed or removed However when you move a line card to a different slot the first number in the interface ...

Страница 23: ...lots are numbered beginning with slot 0 a dual width slot reserved for the NSE 100 on the bottom and continuing from the lower left to the upper right through slot 5 Note The NSE 100 is the only card supported in slot 0 The interface address of the interface on an OC12 POS line card in slot 2 is 2 0 slot 2 and interface 0 If the OC12 POS line card was in slot 4 this same interface would be numbere...

Страница 24: ...1 12 OC12 Packet Over SONET Line Card Installation and Configuration OL 3437 01 Chapter 1 Overview Identifying Interface Addresses ...

Страница 25: ...t a service representative for ordering information OC12 POS line card For information about the specific OC12 POS line card models see the Line Card Overview section on page 1 1 SC type single mode optical fiber cables to connect the interfaces with the network Single mode optical fiber cables for the OC12 POS line cards are not available from Cisco Systems but are available from commercial cable...

Страница 26: ...e minimum IOS requirements for individual hardware modules or components Note Access to this tool is limited to users with Cisco com login accounts To access Software Advisor click Login at Cisco com and go to Technical Support Help Cisco TAC Tool Index Software Advisor You can also access the tool by pointing your browser directly to http www cisco com cgi bin Support CompNav Index pl Choose a pr...

Страница 27: ...conscient des dangers posés par les circuits électriques et familiarisez vous avec les procédures couramment utilisées pour éviter les accidents Pour prendre connaissance des traductions d avertissements figurant dans cette publication consultez le document Regulatory Compliance and Safety Information Conformité aux règlements et consignes de sécurité qui accompagne cet appareil Warnung Dieses War...

Страница 28: ...e lines Aviso Este símbolo de aviso indica perigo Encontra se numa situação que lhe poderá causar danos físicos Antes de começar a trabalhar com qualquer equipamento familiarize se com os perigos relacionados com circuitos eléctricos e com quaisquer práticas comuns que possam prevenir possíveis acidentes Para ver as traduções dos avisos que constam desta publicação consulte o documento Regulatory ...

Страница 29: ...When removing a component use line card levers and locking thumbscrews to release the bus connectors from the backplane Handle carriers by available handles or edges only avoid touching the printed circuit boards or connectors Place a removed component board side up on an antistatic surface or in a static shielding container If you plan to return the component to the factory immediately place it i...

Страница 30: ...r own expense You can determine whether your equipment is causing interference by turning it off If the interference stops it was probably caused by the Cisco equipment or one of its peripheral devices If the equipment causes interference to radio or television reception try to correct the interference by using one or more of the following measures Turn the television or radio antenna until the in...

Страница 31: ... and Removal page 3 2 Warnings and Cautions page 3 2 Line Card Removal and Installation page 3 3 Connecting OC12 POS Line Card Interface Cables page 3 5 Installation Overview Each line card circuit board is mounted to a metal carrier and is sensitive to electrostatic discharge ESD damage Note When a slot is not in use a blank line card must fill the empty slot to allow the router to conform to ele...

Страница 32: ... CLI Controlled OIR section on page 4 13 which allows for the completion of data traffic before the active interfaces are shut down Note As you disengage the line card from the router online insertion and removal OIR administratively shuts down all active interfaces in the line card Note Before you begin installation read Chapter 2 Preparing for Installation for a list of parts and tools required ...

Страница 33: ...ustration If the line card does not slide freely into the backplane loosen the locking thumbscrews on the neighboring line cards Warning When performing the following procedures wear a grounding wrist strap to avoid ESD damage to the card Some platforms have an ESD connector for attaching the wrist strap Do not directly touch the midplane or backplane with your hand or any metal tool or you could ...

Страница 34: ...t the line card carefully align the edges of the carrier or printed circuit board between the upper and the lower edges of the chassis slot 5 Carefully slide the new line card halfway into the line card slot and connect all required cables 6 With the cables connected carefully slide the line card into the slot until the line card makes contact with the backplane NOTE The line card levers must be p...

Страница 35: ...card see the OC12 POS Line Card Optical Fiber Specifications section on page 1 5 and the Cables and Connectors section on page 1 8 To connect cables to the OC12 POS line card attach one duplex or two simplex optical fiber cables between the OC12 interface port on your OC12 POS line card and your network Ensure that you observe the proper relationship of receive RX cable to RX SC type receptacle an...

Страница 36: ...3 6 OC12 Packet Over SONET Line Card Installation and Configuration OL 3437 01 Chapter 3 Removing and Installing Line Cards Connecting OC12 POS Line Card Interface Cables ...

Страница 37: ...ileged level of the EXEC command interpreter with the enable command before you can use the configure command to configure a new interface or change the existing configuration of an interface The system prompts you for a password if one has been set The system prompt for the privileged level ends with a pound sign instead of an angle bracket At the console terminal use the following procedure to e...

Страница 38: ...in the Related Documentation section on page 8 You execute configuration commands from the privileged level of the EXEC command interpreter which usually requires password access Contact your system administrator if necessary to obtain password access See the Using the EXEC Command Interpreter section on page 4 1 for an explanation of the privileged level of the EXEC On power up the POS interface ...

Страница 39: ... per line End with CNTL Z Router config Step 2 Specify the new interface to configure by entering the interface pos subcommand followed by the interface address of the interface you plan to configure Table 4 2 gives examples Step 3 Assign an IP address and subnet mask to the interface if IP routing is enabled on the system with the ip address configuration subcommand as in the following example Ro...

Страница 40: ...iguring Framing page 4 5 Setting the Source of the Transmit Clock page 4 5 Configuring Cyclic Redundancy Checks page 4 5 Configuring SONET Payload Scrambling page 4 5 Configuring SONET Delay Triggers page 4 6 Note The interface subcommands that follow function the same regardless of the platform in which your OC12 POS line card is installed however all of these commands require that you first ente...

Страница 41: ...mitted data The OC12 POS line card also supports a 32 bit CRC The sender of a data frame calculates the frame check sequence FCS The sender appends the FCS value to outgoing messages The receiver recalculates the FCS and compares it to the FCS from the sender If a difference exists the receiver assumes that a transmission error occurred To configure an interface for a 32 bit CRC enter the crc 32 c...

Страница 42: ...ured as APS working or protected Normally even a few microseconds of line or section level alarms brings down the link until the alarm has been clear for ten seconds If you configure holdoff this link down trigger is delayed for 100 ms If the alarm stays up for more than 100 ms the link is brought down as it is now If the alarm clears before 100 ms the link is not brought down By default the follo...

Страница 43: ... or all interfaces and use the ping command to check connectivity This section includes the following subsections Using show Commands to Verify the New Interface Status page 4 7 Using the ping Command to Verify Network Connectivity page 4 11 Using show Commands to Verify the New Interface Status Table 4 3 demonstrates how you can use the show commands to verify that new interfaces are configured a...

Страница 44: ...d the boot images by using the show version or show hardware command Note The outputs that appear in this document may not match the output you receive when running these commands The outputs in this document are examples only Cisco 7304 Router Following is an example of the show version command from a Cisco 7304 router with the OC12 POS line card Router show version Cisco Internetwork Operating S...

Страница 45: ...tmc0 running system pxf ucode1 v1 4 is active PXF processor tmc1 running system pxf ucode1 v1 4 is active 1 FastEthernet IEEE 802 3 interface s 2 Gigabit Ethernet IEEE 802 3 interface s 1 Packet over SONET network interface s 509K bytes of non volatile configuration memory 31360K bytes of ATA compact flash in bootdisk Sector size 512 bytes 31360K bytes of ATA compact flash in disk0 Sector size 512...

Страница 46: ... 00 00 00 00 00 00 00 00 00 C7 7C F6 44 3F 30 0x70 00 00 00 00 00 00 00 00 00 00 00 00 05 DC 64 28 0x80 1E 37 26 07 08 64 32 28 37 26 09 C4 64 32 28 32 0x90 DD 0C E4 64 32 28 43 24 2E E0 AA 82 64 F4 24 00 0xA0 00 00 00 00 00 00 F2 E0 FF FF FF FF FF FF FF FF 0xB0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 0xC0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 0xD0 FF FF FF FF FF FF FF FF FF FF F...

Страница 47: ...packets sec 1 packets input 24 bytes Received 1 broadcasts 0 runts 0 giants 0 throttles 0 parity 0 input errors 0 CRC 0 frame 0 overrun 0 ignored 0 abort 1 packets output 24 bytes 0 underruns 0 output errors 0 applique 1 interface resets 0 output buffer failures 0 output buffers swapped out 0 carrier transitions Using the ping Command to Verify Network Connectivity Using the ping command you can v...

Страница 48: ... Outgoing data gets looped back to the receiver without actually being transmitted Internal loopback is useful for checking that the OC12 POS line card is working To configure an interface for internal loopback enter the loop internal command Router config interface pos 3 0 Router config if loop internal To disable internal loopback enter the no loop internal command Configuring an Interface for L...

Страница 49: ...nical Assistance Center TAC for assistance with these error messages To contact the TAC see the Obtaining Technical Assistance section on page 9 CLI Controlled OIR Line cards can be removed from the Cisco 7304 router without disrupting data flow by using the hw module slot slot stop start command in EXEC mode The hw module slot slot stop command will stop traffic shut down all line card interfaces...

Страница 50: ...4 14 OC12 Packet Over SONET Line Card Installation and Configuration OL 3437 01 Chapter 4 Configuring the OC12 POS Line Card CLI Controlled OIR ...

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