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Table Of Contents
Physical and Functional Overview
Cisco 10720 Internet Router Hardware Features
Hardware Field Replaceable Units
Network Equipment Building Systems
Product Overview
The Cisco 10720 Internet Router provides IP services to users at optical speeds at the edge of their networks. The Cisco 10720 Internet Router provides network access using Ethernet and Dynamic Packet Transport (DPT), Packet over SONET (POS), or IEEE 802.17 RPR technology for optical connectivity. Each router is equipped with one uplink card and one Ethernet access card.
The Cisco 10720 Internet Router overview is presented in the following sections:
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Physical and Functional Overview
Product Description
The Cisco 10720 Internet Router provides Ethernet and OC-48c/STM-16c Internet access. Ethernet connections are provided by means of copper or optical cables. OC-48c/STM-16c connections are provided by means of optical cables. The router can interoperate with synchronous optical network (SONET) transport infrastructure, but it is not required.
The Cisco 10720 Internet Router has one card cage with two card slots. The upper slot supports one uplink card and the lower slot supports one access card. Network interface connectors are located on the front of the uplink and access cards.
The built-in Flash memory contains a total of 64 MB, with 16 MB dedicated to a read-only partition that contains the Cisco IOS software image that shipped with the router. There are 48 MB dedicated to a read-write partition. The read-write partition contains downloaded Cisco IOS software images and is used to boot up the router.
Additional features of the Cisco 10720 Internet Router are as follows:
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Physical and Functional Overview
The Cisco 10720 Internet Router physical and functional overview is presented in the following sections, and shown in Figure 1-1 and Table 1-1:
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Figure 1-1 Cisco 10720 Internet Router: AC (Top) and DC (Bottom) Power Supplies
Cisco 10720 Internet Router Hardware Features
The Cisco 10720 Internet Router provides two dedicated card slots that are not interchangeable or hot swappable. (See Figure 1-2.) The upper slot contains an uplink card. The lower slot contains an Ethernet access card.
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For more information about the uplink card, refer to the Cisco 10720 Internet Router Uplink Cards Installation and Configuration publication.
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The uplink card with only console and serial ports can be used with one of the Ethernet access cards to customize the Cisco 10720 Internet Router as an Ethernet-only router.
Figure 1-2 Uplink Card and Access Card
The main processing board contains a central processing engine that consists of two sets of processors that manage the control plane traffic and the data plane traffic.
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2 Mpps.The Cisco 10720 Internet Router can be deployed directly over fiber, thus allowing service providers to offer IP plus optical access without the need for extensive SONET/Synchronous Digital Hierarchy (SDH) optical transport infrastructure.
Additional overview information about the router can be located in the Cisco 10720 Internet Router Overview, which accompanies other marketing materials related to the Cisco 10720 Internet Router.
Hardware Field Replaceable Units
The Cisco 10720 Internet Router provides dedicated slots for the uplink card and the access card. The card cage is integrated into a rigid metal frame. The Cisco 10720 Internet Router field replaceable units are presented in the following sections:
Uplink Cards
The uplink cards are available with one of the following:
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There is one slot for an uplink card in the chassis. The cards fit the upper slot of the router chassis. See Figure 1-3 for an example of a typical DPT uplink card.
For more information about the uplink cards, versions of the uplink cards, and uplink card cabling, refer to the Cisco 10720 Internet Router Uplink Cards Installation and Configuration publication.
Figure 1-3 DPT Uplink Card (Front View)
The cable connector is a special LC optical connector. When using the card for DPT connections, the left port is the spatial reuse protocol (SRP) side A and the right port is SRP side B. When POS connections are made, the two ports are independent of each other. Each port consists of transmit (TX) and receive (RX). For additional information, see the "SONET Distance Limitations" section on page 3-11. The console/auxiliary card has console and serial (AUX) ports only.
Figure 1-4 RPR/SRP Uplink Card (Front View)
The cable connector is a special LC optical connector. The RPR/SRP card uses SFP modules. When connecting to DPT networks in Resilient Pack Rings (IEEE 802.17 RPR) mode, the left port is span West, and the right port is span East. When in the Spatial Reuse Protocol (SRP) mode, the left port is side A, and the right port is side B. Each port consists of transmit (TX) and receive (RX). For additional information, see the "SONET Distance Limitations" section on page 3-11
Key features supported by the DPT and POS uplink card are listed below. For a more extensive list of features, consult your Cisco sales representative.
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Key features supported by the RPR/SRP uplink card are listed below. For a more extensive list of features, consult your Cisco sales representative.
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Access Card
The access card is available in either of the following versions:
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There is a slot for one access card in the chassis. The card fits the lower slot of the router chassis. See Figure 1-5 for an example of a typical access card.
For more information about the access card, versions of the access card, and access card cabling, refer to the Cisco 10720 Internet Router Access Cards Installation and Configuration publication.
Figure 1-5 Typical Access Card (Front View)
Key features supported by the access card are listed below. For a more extensive list of features, consult your Cisco sales representative.
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Redundant Power Supply
The Cisco 10720 Internet Router comes with either dual AC or dual DC power supplies for redundancy.
Figure 1-6 shows the AC power supply and Figure 1-7 shows the DC power supply for the Cisco 10720 Internet Router.
Figure 1-6 Cisco 10720 Internet Router AC Power Supply
Figure 1-7 Cisco 10720 Internet Router DC Power Supply
Fan Assembly
The router is equipped with a four-fan assembly located on the inside of the back of the chassis. The fan assembly offers redundancy; therefore, the router can continue to operate if one of the fans fails.
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Mounts
The Cisco 10720 Internet Router can be mounted in the following ways:
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Cable Management
The cable-management system organizes the interface cables that lead into and away from the router. Keep the interface cables out of the way of other cables and free of sharp bends.
The cable-management system consists of the following components:
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Software Features
A list of software features for the Cisco 10720 Internet Router follows. For more information about advanced and other software features, refer to the Cisco IOS Software Configuration for the Cisco 10720 Internet Router publication.
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For the physical specifications of the Cisco 10720 Internet Router, see Appendix A, "Technical Specifications."
Design Specifications
The Cisco 10720 Internet Router includes the following design specifications:
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Network Equipment Building Systems
The Cisco 10720 Internet Router is built to comply with Network Equipment Building Systems (NEBS) (Level 3 per SR-3580) in flammability, structural, and electronics compliance. For more information, see the Regulatory Compliance and Safety Information for the Cisco 10720 document.
Electromagnetic Compatibility
Electromagnetic Compatibility (EMC)—Emissions, Immunity, Electrostatic Discharge (ESD) for product and packaging. For more information, see the "Maintaining Safety with Electricity" section on page 2-3 and the Regulatory Compliance and Safety Information for the Cisco 10720 document.
Bonding and Grounding
You should bond and ground the router for safety, circuit protection, noise currents, reliability, and operations compliance. For more information, see the "Grounding the Cisco 10720 Internet Router" section on page 3-9.
Environmental Monitoring
The Cisco 10720 Internet router provides environmental monitoring to assist the user in tracking router operating temperature and humidity. Heat dissipation is not monitored.
Shock and Vibration
Shock and vibration tests are performed on the Cisco 10720 Internet Router. The router is tested to meet the Corporate Mechanical Design Validation and Test (MDVT) specification. Tests verify that the router operating ranges meet handling and earthquake standards. This router was built to comply with Network Equipment Building Systems (NEBS) (Zone 4 per GR-63-Core) in the following areas:
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