Table Of Contents
Electrical Equipment Guidelines
Preventing Electrostatic Discharge Damage
Distance Limitations and Interface Specifications
Preventive Site Configuration: Maintaining Normal Operation
Initial Configuration Information
Cisco 7206 Installation Checklist
Checking the Shipping Container Contents
Preparing for Installation
Before installing your Cisco 7206 you should consider the power and cabling requirements that must be in place at your installation site, the equipment you will need to install the router, and the environmental conditions your installation site must meet to maintain normal operation. This chapter guides you through the process of preparing for your router installation.
This chapter describes the equipment and site requirements for installing the Cisco 7206. The chapter contains the following sections:
•
Electrical Equipment Guidelines
•
•
•
Note
Warning
Electrical Equipment Guidelines
The port adapters and power supplies are designed to be removed and replaced while the system is operating without presenting an electrical hazard or damage to the system. However, you must power down the system before removing or replacing the I/O controller and network processing engine (NPE).
Caution
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which occurs when electronic cards or components are improperly handled, can result in complete or intermittent system failures. The network processing engine, I/O controller, and each port adapter consists of a printed circuit board that is fixed in a metal carrier. Electromagnetic interference (EMI) shielding, connectors, and a handle are integral components of the carrier. Although the carrier helps protect the boards, use an antistatic strap whenever handling the network processing engine, I/O controller, and port adapters. Handle the carriers by the handle and the carrier edges only; never touch the boards or connector pins.
Caution
Site Requirements
Use this section for obtaining information about site requirements.
AC and DC Power
The AC-input power supply uses a power factor corrector that allows the Cisco 7206 to operate on input voltage and frequency within the ranges of 100 to 240 VAC and 50 to 60 Hz.
Note
The DC-input power supply allows the Cisco 7206 router to operate at -48 VDC nominal in North America and -60 VDC in Europe.
Refer to Table 1-1 in "Product Overview" for system power specifications, including input voltage and operating frequency ranges.
Plant Wiring Guidelines
Following are guidelines for setting up the plant wiring and cabling at your site. When planning the location of the new system, consider the distance limitations for signaling, EMI, and connector compatibility, as described in the following sections.
Interference Considerations
When wires are run for any significant distance in an electromagnetic field, interference can occur between the field and the signals on the wires. This fact has two implications for the construction of plant wiring:
•
•
Note
If you use twisted-pair cable in your plant wiring with a good distribution of grounding conductors, the plant wiring is unlikely to emit radio interference. If you exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal when applicable.
If wires exceed recommended distances, or if wires pass between buildings, give special consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by lightning or other high-energy phenomena can easily load enough energy into unshielded conductors to destroy electronic devices. If you have had problems of this sort in the past, you may want to consult experts in electrical surge suppression and shielding.
Distance Limitations and Interface Specifications
The size of your networks and the distances between connections depend on the type of signal, the signal speed, and the transmission media (the type of cabling used to transmit the signals). For example, standard coaxial cable has a greater channel capacity than twisted-pair cabling. The distance and rate limits in the following descriptions are the IEEE-recommended maximum speeds and distances for signaling; however, you can usually get good results at speeds and distances far greater than these. For example, the recommended maximum rate for V.35 is 2 Mbps, but it is commonly used at 4 Mbps without any problems. If you understand the electrical problems that might arise and can compensate for them, you should get good results with rates and distances greater than those shown here; however, do so at your own risk.
Note
When preparing your site for network connections to the Cisco 7206, you must consider a number of factors related to each type of interface:
•
•
•
•
•
The information listed above is contained in the documentation that is shipped with each port adapter. For example, if you need ATM distance limitations and pinouts, refer to the configuration note PA-A3 Enhanced ATM Port Adapter Installation and Configuration. This configuration note accompanies each PA-A3 enhanced ATM port adapter that is shipped from the factory as an installed item in a Cisco 7206 and as a FRU.
Before installing the Cisco 7206, have all additional external equipment and cables on hand. For ordering information, contact a customer service representative.
Equipment Racks
The rack-mounting hardware included with the Cisco 7206 is suitable for most 19-inch equipment racks and telco-type racks. To easily access FRUs while the router is installed in a rack, make certain you have access to the front and rear of the router.
Before using a particular rack, check for obstructions (such as a power strip) that could impair rack-mount installation. If a power strip does impair a rear rack-mount installation, remove the power strip before installing the Cisco 7206 in the rack, and then replace it after the chassis is installed. As an alternative, you can mount the Cisco 7206 on an equipment shelf provided that the rack dimensions allow you to secure the router to the shelf, and the overall configuration permits safe installation and access. However, we recommend rack-mounting the Cisco 7206. Figure 2-1 shows the Cisco 7206 footprint and outer dimensions.
To use the rack-mounting hardware provided with the Cisco 7206, consider the following guidelines:
•
•
•
Figure 2-1 Cisco 7206 Footprint and Outer Dimensions
When planning your rack installation, consider the following guidelines:
•
Note
•
•
•
•
Note
To properly install the Cisco 7206 chassis in a rack, refer to the instructions in "Installing the Cisco 7206."
Site Environment
Table 2-1 lists the operating and nonoperating environmental site requirements. The ranges listed are those within which the Cisco 7206 will continue to operate; however, a measurement that is approaching the minimum or maximum of a range indicates a potential problem. You can maintain normal operation by anticipating and correcting environmental anomalies before they approach a maximum operating range.
Preventive Site Configuration: Maintaining Normal Operation
Planning a proper location for the Cisco 7206 and the layout of your equipment rack or wiring closet are essential for successful system operation. Equipment placed too close together or inadequately ventilated can cause system overtemperature conditions. In addition, chassis panels made inaccessible by poor equipment placement can make system maintenance difficult. Following are precautions that can help avoid problems during installation and ongoing operation.
When you plan the location and layout of your equipment rack or wiring closet, you need to consider how air flows through your router. The Cisco 7206 draws cooling air in through the intake vent on the right side of the chassis (when you view the router from the front), and moves the air across the internal components and out the exhaust vent on the left side of the chassis.
Temperature sensors on the network processing engine and I/O controller monitor the internal air temperature and send warning messages when the internal air temperature approaches a specified threshold. If the internal temperature exceeds the specified threshold, the system environmental monitor shuts down all internal power to prevent equipment damage from excessive heat. (See "Product Overview," the "Environmental Monitoring and Reporting Functions" section for temperature threshold information.)
Figure 2-2 shows the airflow through the router.
Figure 2-2 Internal Airflow—Top View
The left and right sides of the chassis must remain unobstructed to ensure adequate airflow and prevent overheating inside the chassis; we recommend at least 3 in. (7.62 cm) of clearance.
General Precautions
Follow these general precautions when planning your equipment locations and connections:
•
•
•
•
Power Considerations
Follow these precautions and recommendations when planning power connections to the Cisco 7206:
•
•
Note
The Cisco 7206 chassis employs two threaded M5 chassis grounding receptacles, located on the rear of the chassis, which are intended to be bonded directly to the central offices or other interior ground system. The chassis ground requires M5 screws and locking hardware, which are not included. (For instructions on how to properly ground the chassis, refer to "Installing the Cisco 7206," the "Providing a Chassis Ground Connection for the Router Chassis" section.)
Tools for Installation
Your Cisco 7206 chassis is fully assembled at the factory; no assembly is required. However, you will need the following tools and equipment to install the chassis and the rack-mount and cable-management kit:
•
•
•
•
The rack-mount and cable-management kit includes the following parts:
•
•
•
•
•
In addition, you might need the following external equipment:
•
•
•
•
•
•
Initial Configuration Information
After you install the chassis and verify that all the hardware is operating properly, you must configure the system and individual interfaces before you can connect your system to external networks. You can use the setup command facility or standard configuration commands to enter the configuration information.
Before you begin, you should be prepared with global (system-wide) parameters such as host names, passwords, and routing protocols, and configuration information for each interface such as addresses, rates or speeds of operation, routing protocol specifics, and so on.
Following is some of the information you are likely to need, depending on your configuration:
•
•
•
•
•
•
•
For complete configuration instructions, refer to the Configuration Fundamentals Configuration Guide and the Configuration Fundamentals Command Reference, which are available on Cisco.com.
Cisco 7206 Installation Checklist
To assist you with your installation and to provide a historical record of what was done by whom, use the Cisco 7206 Installation Checklist in Table 2-2. Make a copy of this checklist and indicate when each procedure or verification is completed. When the checklist is completed, place it in your site log (described at the end of this chapter) along with the other records for your new router.
Checking the Shipping Container Contents
Once you receive your Cisco 7206 router, use the following procedure to check the contents of the shipping container. Use the Cisco 7206 Installation Checklist in Table 2-2 and the Cisco 7206 Component List in Table 2-3 to ensure you received all the components you ordered.
Note
Step 1
•
•
Step 2
•
•
•
•
Note
Step 3
Step 4
Table 2-3 Cisco 7206 Component List
Chassis
Cisco 7206 chassis configured with a network processing engine, I/O controller, up to two AC or DC power supplies, up to six port and service adapters (blank adapters should be installed in empty port adapter slots), and up to two Flash memory cards
Accessories:
•
•
•
The following accessories might arrive in separate shipping containers:
Two rack-mount brackets, two cable-management brackets, eight M4 x 8-mm Phillips flathead screws, and six 10-32 x 3/8-inch slotted binderhead screws
Up to two power cables
If ordered, router hardware and software documentation1
1 Titles and quantities of documents will vary. You must order the type and quantity of documentation sets when you order the hardware.
Site Log
A site log provides a historical record of all actions relevant to the Cisco 7206 operation and maintenance. Keep your site log in a common place near the chassis where anyone who performs tasks has access to it. Site log entries might include the following:
•
•
–
–
–
–
–
–
–
–
–
–
–
–
Table 2-4 shows a sample site log page. Make copies of the sample or design your own site log to meet the needs of your site and equipment.
