Table Of Contents
Cisco IOS XR Software Release Requirements
Hardware Revision Requirements
Physical Layer Interface Modules
Gigabit Ethernet PLIM Overviews
Oversubscription of 10-GE Ports
10-Gigabit Ethernet PLIM with DWDM XENPAK Modules
10-Gigabit Ethernet Tunable WDMPHY PLIM
Before You Remove or Install a PLIM or XENPAK Module
Preventing Electrostatic Discharge
Guidelines for Card Installation and Removal
How to Remove or Install a PLIM
How to Remove or Install a XENPAK Optics Module
Removing a XENPAK Optics Module
Installing a XENPAK Optics Module
How to Remove or Install a PLIM Cable Management Bracket
Removing a PLIM Cable Management Bracket
Installing a PLIM Cable Management Bracket
Removing and Installing Fiber-Optic Interface Cables
Removing Fiber-Optic Interface Cables
Installing Fiber-Optic Interface Cables
Verifying the Installation of a PLIM
Obtaining Documentation, Obtaining Support, and Security Guidelines
Cisco CRS-1 Carrier Routing System Gigabit Ethernet Physical Layer Interface Module Installation Note
Document Part Number: OL-6437-04
This document describes the various 10-Gigabit Ethernet (GE) physical layer interface modules (PLIMs) used in the Cisco CRS-1 router Carrier Routing System 16-slot and 8-slot line card chassis (LCC). It provides an overview of the different Gigabit Ethernet PLIMs and provides instructions on how to remove and install a PLIM and its associated components.
Contents
This document contains the following sections:
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Physical Layer Interface Modules
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Changes to This Document
Table 1 lists the technical changes made to this document since it was first printed.
Table 1 Changes to This Document
OL-6437-04
February 2007
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OL-6437-03
July 2006
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OL-6437-02
March 2006
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OL-6437-01
November 2004
Initial release of the document.
Important Information
This section contains the following sections:
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Product Numbers
Table 2 lists the Cisco product numbers for the products to which this publication applies.
Table 2 PLIM Descriptions and Software and Hardware Compatibility
10-GE PLIM
8-10GBE=
8-port 10-GE PLIM using XENPAK optics modules:
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CRS-XENPAK10GB-LR+=
CRS-XENPAK10GB-ER+=•
DWDM-XENPAK-60.61= to DWDM-XENPAK-30.33=13.0
73-9231-08 A0
10-GE DWDM PLIM
4-10GE-ITU/C=
Cisco CRS-1 4-Port 10-Gigabit Ethernet (C-band) DWDM PLIM
3.3
73-10209-02 A0
PLIM impedance carrier
CRS-INT-IMPEDANCE=
Blank card carrier for each empty PLIM slot (required for EMI compliance and cooling)
3.0
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Router Hardware Installation
For hardware installation and configuration information for the Cisco CRS-1 router, see the router hardware installation documents in the "Related Documentation" section. These documents include information on the router switch fabric and how it affects operation of the PLIM. They also include PLIM slot locations and other requirements.
The PLIMs described in this document are supported on both the 8-slot and 16-slot Cisco CRS-1 line card chassis.
Cisco IOS XR Software Release Requirements
Table 2 lists the Cisco IOS XR releases that are compatible with the 10-GE PLIMs.
For software configuration information, see the Cisco IOS XR software configuration and command reference publications for the installed Cisco IOS XR release at the following URL:
http://www.cisco.com/en/US/products/ps5763/products_installation_and_configuration_guides_list.
htmlSee the Cisco IOS XR software release notes for additional software release information at the following URL:
http://www.cisco.com/en/US/products/ps5763/prod_release_notes_list.html
Hardware Revision Requirements
To ensure compatibility with the software, your Ethernet PLIM should have a specific hardware revision number. This number is printed on a label affixed to the component side of the PLIM. The hardware revision number can also be displayed using the show diag command. Minimum revision numbers are listed in Table 2.
Related Documentation
For complete planning, installation, and configuration information, see the documents for your chassis type (16-slot or 8-slot) listed in this section. Cisco CRS-1 router product documentation is available on line at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/core/crs/index.htm
Hardware Documents
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Software Documents
For a complete listing of software documentation available for the Cisco CRS-1 router, see About Cisco IOS XR Software Documentation for your release, available on line at the following URL:
http://www.cisco.com/en/US/products/ps5763/products_documentation_roadmaps_list.html
Physical Layer Interface Modules
A physical layer interface module (PLIM) provides the packet interfaces for the routing system. Optics modules on the PLIM contain ports to which fiber-optic cables are connected. User data is received and transmitted through the PLIM ports and converted between the optical signals (used in the network) and the electrical signals (used by Cisco CRS-1 router components).
Each PLIM is paired with a modular services card (MSC) through the chassis midplane. The MSC provides Layer 3 services for the user data, and the PLIM provides Layer 1 and Layer 2 services. An MSC can be paired with different PLIMs to provide a variety of packet interfaces and port densities (for example, OC-192c/STM-64c POS and 10-Gigabit Ethernet).
MSCs and PLIMs are installed on opposite sides of the line card chassis and mate through the chassis midplane. Each MSC and PLIM pair is installed in corresponding chassis slots in the chassis (on opposite sides of the chassis). The chassis midplane enables you to remove and replace an MSC without disconnecting the user cables on the PLIM.
The Cisco CRS-1 router supports the following number of PLIMs for each chassis type. You can mix and match PLIM types in the chassis.
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For additional information about the operation of MSCs and PLIMs, see Cisco CRS-1 Carrier Routing System Line Card Chassis System Description for the 16-slot or 8-slot chassis.
Gigabit Ethernet PLIM Overviews
Gigabit Ethernet PLIMs provide data packet buffering, Layer 2 processing, and multiplexing and demultiplexing of the 10-GE data streams, including processing for VLANs and back-pressure signals from the MSC. In addition, PLIMs include power and clocking components, voltage and temperature sensors, and an identification EEPROM that stores initial configuration and PLIM hardware information.
The Gigabit Ethernet PLIMs all share the following features:
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For additional features and specifications, see the data sheets at the following URL:
http://www.cisco.com/en/US/products/ps5763/products_data_sheets_list.html
Figure 1 shows an illustration of a PLIM. The OC-48c/STM-16c POS/DPT PLIM is shown; other PLIMs are similar.
Figure 1 PLIM Board
The following sections provide information specific to the Gigabit Ethernet PLIMs currently available for the Cisco CRS-1 router:
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10-Gigabit Ethernet PLIM
The 10-GE PLIM supports from one to eight pluggable XENPAK optics modules, each providing full-duplex long-wavelength or extra-long-wavelength optics with subscriber connector (SC) fiber-optic interfaces.
Figure 2 shows the front panel of the 8-port 10-GE PLIM. This PLIM is a Class 1 laser product.
Warning
Figure 2 8-Port 10-GE PLIM Front Panel
The 8-port 10-GE PLIM has:
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Table 3 describes the PLIM LEDs.
The 10-GE PLIM has the following physical characteristics:
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Oversubscription of 10-GE Ports
Processing on the 10-GE PLIM is performed by two PLIM hardware controllers, each of which can process up to 24 Gbps of traffic. Ports 0 to 3 are associated with one PLIM hardware controller, while ports 4 to 7 are associated with the second PLIM hardware controller. In addition, the PLIM ports are serviced by two MSC hardware controllers, the switching capacity of which is approximately 62 Mpps each. Each MSC hardware controller is statically assigned to four of the eight ports.
Because of this PLIM design, the placement of the optics modules in the PLIM can greatly affect whether or not oversubscription occurs. For example, if modules are installed in ports 0 and 1, each interface has 10 Gbps of throughput. Adding another module in port 2 causes oversubscription on all interfaces (0, 1, and 2).
If your configuration cannot support oversubscription, use the following guidelines to determine the PLIM ports in which to install optics modules:
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If your configuration can support oversubscription and you want to install more than four optics modules in a PLIM, we recommend that you install additional modules in empty ports, alternating between upper and lower ports and odd and even ports. For example, if you install a fifth optics module in an odd port in the upper set of ports (0 to 3), be sure to install the next module in an even port in the lower set of ports (4 to 7), and so on.
10-Gigabit Ethernet PLIM with DWDM XENPAK Modules
In addition to Gigabit Ethernet modules, the 10-GE PLIM supports from one to four pluggable dense wavelength-division multiplexing (DWDM) XENPAK optics modules, each providing full-duplex long-wavelength DWDM optics with SC fiber-optic interfaces. See the "10-Gigabit Ethernet PLIM" section for general information regarding the PLIM.
When using DWDM optics modules on your 10-GE PLIM, an empty slot must exist next to each installed DWDM module to provide optimal cooling for the DWDM optics. For this reason, you can install up to four DWDM XENPAK modules in the 10-GE PLIM. Given this restriction and to optimize the PLIM for oversubscription, you should use port positions 0, 2, 5, and 7.
Caution
Table 4 lists the part numbers and frequencies of the DWDM XENPAK optics modules that are compatible with the 10-GE PLIM.
10-Gigabit Ethernet Tunable WDMPHY PLIM
The 4-port 10-GE WDMPHY PLIM provides four 10-Gigabit Ethernet dense wavelength-division multiplexing (DWDM) interfaces that support both G.709 Generic Forward Error Correction (GFEC) and high-gain Enhanced Forward Error Correction (EFEC) and extend reach up to 2000 km without requiring signal regeneration. The 4-port 10-GE WDMPHY PLIM is also completely tunable across the C band with 50-GHz spacing and supports router-to-router SONET/SDH-like OAMP.
The 4-port 10-GE WDMPHY PLIM provides four 10-GE DWDM lucent connector (LC) fiber-optic interfaces. Figure 3 shows the front panel of the 4-port 10-GE WDMPHY PLIM. This PLIM is a Class 1 laser product.
Warning
Figure 3 4-Port 10-GE WDMPHY PLIM Front Panel
The 4-port 10-GE WDMPHY PLIM has the following LEDs:
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Table 5 describes the PLIM LEDs.
The 10-GE WDMPHY PLIM has the following physical characteristics:
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PLIM Impedance Carrier
A PLIM impedance carrier must be installed in each empty PLIM slot in the Cisco CRS-1 chassis (see Figure 4). The impedance carrier preserves the integrity of the chassis and is required for EMI compliance and proper cooling in the chassis.
Figure 4 PLIM Impedance Carrier
Before You Remove or Install a PLIM or XENPAK Module
Review the following sections carefully before you remove or install a PLIM or XENPAK module:
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Safety Guidelines
Before you perform any procedure in this document, review the safety guidelines in this section to avoid injuring yourself or damaging the equipment.
The following guidelines are for your safety and to protect equipment. The guidelines do not include all hazards. Be alert.
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Preventing Electrostatic Discharge
Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are improperly handled, results in complete or intermittent failures. We recommend that you use an ESD-preventive strap whenever you handle network equipment or components.
Following are guidelines for preventing ESD damage:
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Guidelines for Card Installation and Removal
Guidelines for card installation and removal include the following:
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Figure 5 Ejector Levers and Captive Screws
Caution
The router can indicate a hardware failure if you do not follow proper procedures. Remove or install only one card at a time. Wait at least 15 seconds before removing or installing another card.
How to Remove or Install a PLIM
A PLIM provides the data interfaces for the routing system and mates with its associated MSC through the chassis midplane.
This section contains the following procedures:
Removing a PLIM
This section describes how to remove a PLIM from the line card chassis.
Caution
Required Tools and Equipment
You need the following tools to remove a PLIM:
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Steps
To remove a PLIM, see Figure 6 and follow these steps:
Step 1
Step 2
Warning
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Figure 6 Removing or Installing a PLIM
Installing a PLIM
This section describes how to install a PLIM in the line card chassis. You can install a PLIM in any slot not occupied by a route processor (RP) card (or a fan controller card, 16-slot chassis only). If you install a new MSC or PLIM, you must first remove the impedance carrier card from the available slot.
Caution
Required Tools and Equipment
You need the following tools and part to install a PLIM:
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Steps
To install a PLIM, see Figure 6 and follow these steps:
Step 1
Step 2
Step 3
Note
Step 4
Step 5
Caution
Step 6
Note
Step 7
Step 8
Caution
Caution
Step 9
Step 10
Step 11
Step 12
http://www.cisco.com/univercd/cc/td/doc/product/ioxsoft/iox33/index.htm
Warning
How to Remove or Install a XENPAK Optics Module
The 8-port 10-GE PLIM supports the Gigabit Ethernet and DWDM XENPAK optics modules described in Table 2. These optics modules are installed in ports on the PLIM and provide the optical interface connectors for the PLIM.
Note
Figure 7 shows a DWDM XENPAK optics module.
Figure 7 DWDM XENPAK Optics module
Captive installation screws
Transmit (TX) optical bore
Center wavelength warning label
Receive (RX) optical bore
Dust plug
XENPAK module label
This section contains the following procedures:
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Prerequisites
To stay within the maximum received power specification on the RX side of the XENPAK module, an attenuator might be required. To determine if an attenuator is needed for the XENPAK module, see "10-GE XENPAK Interfaces" section.
Required Tools and Equipment
Have the following equipment available before you install or remove a XENPAK module:
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Removing a XENPAK Optics Module
This section describes how to remove a XENPAK optics module from the PLIM.
Step 1
Caution
Step 2
Step 3
Step 4
Step 5
Step 6
Installing a XENPAK Optics Module
This section describes how to install a XENPAK optics module in the PLIM.
Step 1
Step 2
Step 3
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Step 4
Cleaning Optics
It is important to inspect and clean fiber-optic components before making a fiber-optic connection (for example, plugging a fiber-optic connector into a fiber-optic receptacle). Any contamination in the fiber connection can cause the optic component or the whole system to fail. Even microscopic dust particles, oil from human hands, film residues (condensed from vapors in the air), and powdery coatings (left after water or other solvents evaporate) can cause a variety of problems for optical connections.
Caution
See the following URL for instructions on how to clean fiber-optic components:
http://www.cisco.com/warp/public/127/cleanfiber2.html
Always follow the fiber-optic cleaning procedures carefully. The goal is to eliminate any dust or contamination and provide a clean environment for the fiber-optic connection. Inspection, cleaning, and reinspection are critical steps that must be performed before making any fiber-optic connection.
How to Remove or Install a PLIM Cable Management Bracket
Cisco CRS-1 chassis include a cable management system that organizes the interface cables entering and exiting the router, keeping them out of the way and free of sharp bends.
Caution
The cable management system consists of two separate components:
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This section describes how to remove and install the PLIM cable management bracket. Figure 8 shows the PLIM cable management bracket.
Figure 8 PLIM Cable Management Bracket
Caution
Required Tools and Equipment
You need the following tools and part to remove or install a PLIM cable management bracket:
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Removing a PLIM Cable Management Bracket
To remove a PLIM cable management bracket, see Figure 9 (the 10-GE PLIM is shown in the illustration, but the installation procedure is similar for all PLIMs) and follow these steps:
Step 1
Step 2
Step 3
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Step 4
Figure 9 PLIM Cable Management Installation and Removal
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Step 6
Installing a PLIM Cable Management Bracket
To install a PLIM cable management bracket, follow these steps:
Step 1
Step 2
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Step 3
Cabling and Specifications
The following sections provide information about specifications and cabling for Gigabit Ethernet PLIMs:
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10-GE XENPAK Interfaces
The 10-GE XENPAK optics modules use single-mode fiber-optics with SC connectors. The maximum distance for single-mode installations is determined by the amount of light loss in the fiber path. If your environment requires the light to travel close to the typical maximum distance (as listed in Table 6), you should use an optical time domain reflectometer (OTDR) to measure the power loss.
Two types of 10-GE XENPAK interfaces are available: long wavelength, 1310 nanometers (nm), and extra-long wavelength, 1550 nm.
Table 6 lists the specifications for the 10-GE XENPAK interfaces. The actual distance in any given case depends on the quality of the fiber connected to the transceiver.
1 Requires a 5-dB 1550-nm fixed loss attenuator for distances less than 20 km.
2 Links longer than 30 km are considered engineered links meaning that, for distances up to 30 km, no special link design rules need to be considered. Link distances beyond 30 km require that you verify the cable characteristics; in particular, you should verify the cable's loss value.
Tip
10-GE DWDM XENPAK Interfaces
The 10-GE DWDM XENPAK optics modules use single-mode fiber-optics with SC connectors. When the input power is more than the maximum receive power, you need an attenuator installed in the RX port to bring the optical power to the receiver to the correct range.
The 10-GE DWDM XENPAK interfaces are long-wavelength, 1310 nanometers (nm).
Table 7 lists the specifications of the 10-GE DWDM XENPAK interfaces.
Table 7 10-GE DWDM XENPAK Optics Specifications
Spectral width1
0.2 nm
Transmit optical power range
-1 to +3 dBm
Side-mode suppression ratio (SMSR)
30 dB
Transmitter extinction ratio (OMI)
9 dB
Receiver optical input wavelength
1530 to 1565 nm
Receiver damage threshold
-1 dBm
Dispersion tolerance
-500 to 1600 ps/nm
Receive optical power range2
-24 to -7 dBm
1 Full width, -20dB from maximum, with resolution bandwidth (RBW) = 0.01 nm
2 Measured at optical signal-to-noise ratio (OSNR) of 30 dB at 0.1-nm RBW
Caution
Caution
10-GE DWDM Tunable Interfaces
Each 10-GE DWDM line interface provides one 10-Gbps, long-reach, ITU-compliant, 50-GHz-spaced optical interface using LC connectors supporting 10-Gigabit Ethernet LAN PHY interfaces. The output line interface is tunable across 82 adjacent 50-GHz wavelengths, enabling support for C-Band DWDM networks. Table 8 lists the optics specifications of the interfaces on the 10-GE WDMPHY PLIM.
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