Preparing to Install the Cisco MGX 8850 RPM
This chapter describes the tasks you must perform before you begin to install the Cisco MGX 8850 Route Processor Module (RPM). This chapter includes the following sections:
•Safety Recommendations
•General Site Requirements
•Installation Checklist
•Creating a Site Log
•Preparing to Connect to a Network
Safety Recommendations
Note Because the RPM is a service module that installs in the MGX 8850 chassis, refer to the document, Cisco MGX 8850 Wide Area Switch Installation and Configuration, for recommendations about safety.
In addition, follow these guidelines to ensure general safety:
•Keep the chassis area clear and dust-free during and after installation.
•Keep tools away from walk areas where you and others could fall over them.
•Do not wear loose clothing that could get caught in the chassis. Fasten your tie or scarf and roll up your sleeves.
•Wear safety glasses if you are working under any conditions that might be hazardous to your eyes.
•Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
Warning Ultimate disposal of this product should be handled according to all national laws and regulations.
Maintaining Safety with Electricity
Follow these guidelines when working on equipment powered by electricity.
Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.
•Locate the emergency power OFF switch for the room in which you are working. Then, if an electrical accident occurs, you can act quickly to turn OFF the power.
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units.
Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is OFF and the power cord is connected. For systems without a power switch, line voltages are present within the power supply when the power cord is connected.
•Do not work alone if potentially hazardous conditions exist.
•Never assume that power is disconnected from a circuit. Always check.
Warning Read the installation instructions before you connect the system to its power source.
•Look carefully for possible hazards in your work area, such as moist floors, ungrounded power extension cables, frayed power cords, and missing safety grounds.
•If an electrical accident occurs, proceed as follows:
–Use caution; do not become a victim yourself.
–Power OFF the system.
–If possible, send another person to get medical aid. Otherwise, assess the condition of the victim and then call for help.
–Determine if the person needs rescue breathing or external cardiac compressions; then take appropriate action.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when electronic components are improperly handled and can result in complete or intermittent failures.
Always follow ESD-prevention procedures when removing and replacing components. Ensure that the chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect the clip to an unpainted surface of the chassis frame to safely channel unwanted ESD voltages to ground. To properly guard against ESD damage and shocks, the wrist strap and cord must operate effectively. If no wrist strap is available, ground yourself by touching the metal part of the chassis.
Caution
For safety, periodically check the resistance value of the antistatic strap, which should be between 1 to 10 megohms (Mohms).
General Site Requirements
This section describes the requirements your site must meet for safe installation and operation of your system. Ensure that your site is properly prepared before beginning installation.
Power Supply Considerations
Check the power at your site to ensure that you are receiving "clean" power (free of spikes and noise). Install a power conditioner if necessary.
Warning The device is designed to work with TN power systems.
The AC power supply of the RPM is part of the MGX 8850 chassis. The RPM, when installed in the MGX 8850 chassis, receives -48 volts DC power from the midplane.
The DC power supply of the RPM is part of the MGX 8850 chassis. The RPM, when installed in the MGX 8850 chassis, receives -48 volts VDC power from the midplane.
The RPM is installed in the MGX 8850 chassis. Refer to the publication, Cisco MGX 8850 Hardware Installation for installation considerations. The location of the MGX 8850 chassis and the layout of your equipment rack or wiring room are extremely important for proper system operation. Equipment placed too close together, inadequate ventilation, and inaccessible panels can cause system malfunctions and shutdowns, and can make RPM maintenance difficult.
Installation Checklist
The Installation Checklist lists the procedures for initial hardware installation of a new RPM. Make a copy of this checklist and mark the entries as you complete each procedure. Include a copy of the checklist for each system in your Site Log (refer to the next section, "Creating a Site Log")
RPM installation checklist for site _________________________________________
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Installation checklist copied |
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Background information placed in the Site Log |
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Site power voltages verified |
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Required tools available |
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Additional equipment available |
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Cisco MGX 8850 RPM received |
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Cisco Documentation CD received |
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Cisco Information Packet received |
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Cisco MGX 8850 Route Processor Module Installation and Configuration publication received |
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Optional printed documentation received |
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Chassis components verified |
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Initial electrical connections established |
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ASCII terminal or PC attached to console port |
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Signal distance limits verified |
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Startup sequence steps completed |
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Initial system operation verified |
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Software image verified |
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Creating a Site Log
The Site Log provides a record of all actions relevant to the RPM. Keep it near the chassis where anyone who installs or maintains the RPM has access to it. Use the Installation Checklist (see the previous section, "Installation Checklist") to verify steps in the installation and maintenance of your RPM. Site Log entries might include the following:
•Installation progress—Make a copy of the Installation Checklist and insert it into the Site Log. Make entries on the checklist as you complete each procedure.
•Upgrade and maintenance procedures—Use the Site Log as a record of ongoing system maintenance and expansion. Each time a procedure is performed on the RPM, update the Site Log to reflect the following:
–Configuration changes
–Changes and updates to Cisco IOS software
–Maintenance schedules and requirements
–Corrective maintenance procedures performed
–Intermittent problems
–Related comments and notes
Preparing to Connect to a Network
When setting up your RPM in the MGX 8850, consider distance limitations and potential electromagnetic interference (EMI) as defined by the EIA.
Note The Ethernet, console, and auxiliary ports contain safety extra-low voltage (SELV) circuits. Connect them only to SELV-circuit equipment.
Ethernet Connection
The IEEE has established Ethernet as standard 802.3. The RPM Ethernet implementation is as follows:
•10BaseT—Ethernet on unshielded twisted-pair (UTP) cable. The maximum segment distance is 328 feet (100 meters). UTP cables look like the wiring used for ordinary telephones; however, UTP cables meet certain electrical standards that telephone cables do not.
•The Ethernet interface on your RPM operates at 10 Mbps.
•The connection to the 10BaseT port can be made using an Ethernet 10BaseT cable with RJ-45 connector.
The cables required to connect the RPM Ethernet and Fast Ethernet service module to an Ethernet network are not included. For cable ordering information, contact customer service.
For detailed information about making Ethernet connections, refer to "Cabling Cisco MGX 8850 RPM Port Adapters," in the "Attaching 4E Port Adapter Interface Cables" section. For cable and port pinouts, refer to "Cable and Connector Specifications,"in the "4E Port Adapter Cable Pinouts" section.
Fast Ethernet Connection
The FE-TX or FE-FX port adapters on the RPM provide a 100-Mbps, 100BASE-T Fast Ethernet interface and support both full-duplex and half-duplex operation.
Each Fast Ethernet port on the FE-TX port adapter has an RJ-45 connector to attach to Category 5 unshielded twisted-pair (UTP) for 100BASE-TX, and a MII connector that permits connection through external transceivers to multimode fiber for 100BASE-FX, or to Category 3, 4, and 5 UTP or shielded twisted-pair (STP) for 100BASE-T4 physical media.
Each Fast Ethernet port on the FE-FX port adapter has an SC-type fiber-optic connector for 100BASE-FX, and an MII connector that permits connection through external transceivers to multimode fiber for 100BASE-FX, or to Category 3, 4, and 5 UTP or shielded twisted-pair (STP) for 100BASE-T4 physical media.
The IEEE has established Fast Ethernet as standard 802.3u. The RPM Fast Ethernet implementation is as follows:
•100BASE-TX—100BASE-T, half and full duplex over Category 5 unshielded twisted-pair (UTP), Electronics Industry Association/Telecommunications Industry Association [EIA/TIA]-568-compliant cable.
•100BASE-FX—100BASE-T, half and full duplex over optical fiber.
•100BASE-T4—100BASE-T, half and full duplex over Category 3, 4, or 5 UTP or shielded twisted-pair (STP) cabling with four pairs; also called 4T+ or T2, which is 2-pair UTP over Category 3 cable.
For detailed information about making Fast Ethernet connections, refer to "Cabling Cisco MGX 8850 RPM Port Adapters," in the "Attaching 4E Port Adapter Interface Cables" section. For cable and port pinouts, refer to "Cable and Connector Specifications,"in the "4E Port Adapter Cable Pinouts" section.
FDDI Connection
FDDI, which specifies a 100-Mbps, wire-speed, token-passing dual-ring network using fiber-optic transmission media, is defined by the ANSI X3.1 standard and by ISO 9314. A typical FDDI configuration has both dual-attached and single-attached connections. The FDDI port adapters have an optical bypass switch feature by way of a DIN connection.
The FDDI port adapters provide a half-duplex FDDI for both single-mode and multimode fiber-optic cable. The two physical ports (PHY A and PHY B) are available with either single-mode (SC) or multimode MIC receptacles. Each port adapter's FDDI connection allows a maximum bandwidth of 100 Mbps per the FDDI standard.
FDDI uses two types of fiber-optic cable:
•Single-mode (also called monomode) optical fiber with SC-type, duplex and simplex connectors
•Multimode optical fiber with MIC connectors
The following FDDI port adapter combinations are available:
•PA-F-MM—FDDI PHY-A multimode, PHY-B multimode port adapter with optical bypass switch capability
•PA-F-SM—FDDI PHY-A single-mode, PHY-B single-mode port adapter with optical bypass switch capability
For detailed information about making FDDI connections, refer to "Cabling Cisco MGX 8850 RPM Port Adapters." For cable and port pinouts, refer to "Cable and Connector Specifications."
Console and Auxiliary Port Considerations
The RPM includes asynchronous serial console and auxiliary ports. The console and auxiliary ports provide access to the RPM either locally (with a console terminal) or remotely (with a modem). This section discusses important cabling information to consider before connecting a console terminal (an ASCII terminal or PC running terminal emulation software) to the console port or a modem to the auxiliary port.
The main difference between the console and auxiliary ports is that the auxiliary port supports hardware flow control and the console port does not. Flow control paces the transmission of data between a sending device and a receiving device and ensures that the receiving device can absorb the data sent to it before the sending device sends more. When the buffers on the receiving device are full, a message is sent to the sending device to suspend transmission until the data in the buffers has been processed. Because the auxiliary port supports flow control, it is ideal for use with the high-speed transmissions of a modem. Console terminals transmit at slower speeds than modems, so the console port is ideal for use with console terminals.
Console Port Connection
The RPM includes an EIA/TIA-232 asynchronous serial console port (RJ-45). Depending on the cable and the adapter used, this port will appear as either a DTE or DCE device at the end of the cable. Cables and adapters are included with the RPM to connect a console terminal (an ASCII terminal or PC running terminal emulation software) to the console port. To connect an ASCII terminal to the console port, use the RJ-45 rollover cable with the female RJ-45-to-DB-25 adapter (labeled Terminal). To connect a PC running terminal emulation software to the console port, use the RJ-45 rollover cable with the female RJ-45-to-DB-9 adapter (labeled Terminal). The default parameters for the console port are 9600 baud, 8 data bits, no parity, and 2 stop bits.
The console port does not support hardware flow control. For detailed information about installing a console terminal and modem, refer to "Installing the Cisco MGX 8850 RPM," in the "Connecting a Modem to the Auxiliary Port" section and the "Connecting a Terminal or PC to the MGX 8850 RPM Console Port" section. For cable and port pinouts, refer to "Cable and Connector Specifications."
Auxiliary Port Connections
The RPM includes an EIA/TIA-232 asynchronous serial auxiliary port (RJ-45) that supports flow control. Depending on the cable and the adapter used, this port will appear as either a DTE or DCE device at the end of the cable. A cable and an adapter are included with the RPM to connect a modem to the auxiliary port. To connect a modem to the auxiliary port, use the RJ-45 rollover cable with the male RJ-45-to-DB-25 adapter (labeled Modem). For detailed information about connecting devices to the auxiliary port, refer to "Installing the Cisco MGX 8850 RPM," in the "Connecting a Modem to the Auxiliary Port" section. For cable and port pinouts, refer to "Cable and Connector Specifications."