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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:
In addition, follow these guidelines to ensure general safety:
 | Warning Ultimate disposal of this product should be handled according to all national laws and regulations. |
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. |
| 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. |
| Warning Read the installation instructions before you connect the system to its power source. |
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). |
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.
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.
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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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:
When setting up your RPM in the MGX 8850, consider distance limitations and potential electromagnetic interference (EMI) as defined by the EIA.
The IEEE has established Ethernet as standard 802.3. The RPM Ethernet implementation is as follows:
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 Chapter 4, "Cabling Cisco MGX 8850 RPM Port Adapters," in the section "Attaching 4E Port Adapter Interface Cables." For cable and port pinouts, refer to Appendix B, "Cable and Connector Specifications," in the section "4E Port Adapter Cable Pinouts."
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:
For detailed information about making Fast Ethernet connections, refer to Chapter 4, "Cabling Cisco MGX 8850 RPM Port Adapters," in the section "Attaching FE Port Adapter Interface Cables." For cable and port pinouts, refer to Appendix B, "Cable and Connector Specifications," in the section "Fast Ethernet Port Adapter Pinouts."
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:
The following FDDI port adapter combinations are available:
For detailed information about making FDDI connections, refer to Chapter 4, "Cabling Cisco MGX 8850 RPM Port Adapters," in the section "Attaching FDDI Port Adapter Interface Cables." For cable and port pinouts, refer to Appendix B, "Cable and Connector Specifications," in the section "FDDI Optical Bypass Switch Pinouts."
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.
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 Chapter 3, "Installing the Cisco MGX 8850 RPM," in the sections "Connecting a Modem to the Auxiliary Port" and "Connecting a Terminal or PC to the MGX 8850 RPM Console Port." For cable and port pinouts, refer to Appendix B, "Cable and Connector Specifications."
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 Chapter 3, "Installing the Cisco MGX 8850 RPM," in the section "Connecting a Modem to the Auxiliary Port." For cable and port pinouts, refer to Appendix B, "Cable and Connector Specifications."
Posted: Tue Oct 19 10:35:03 PDT 1999
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