Cisco 10720 Internet Router Installation and Configuration Guide
Product Overview
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Product Overview

Table Of Contents

Product Overview

Product Description

Physical and Functional Overview

Cisco 10720 Internet Router Hardware Features

Hardware Field Replaceable Units

Uplink Cards

Access Card

Redundant Power Supply

Fan Assembly

Mounts

Cable Management

Software Features

Design Specifications

Network Equipment Building Systems

Electromagnetic Compatibility

Bonding and Grounding

Environmental Monitoring

Shock and Vibration


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:

Product Description

Physical and Functional Overview

Design Specifications

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:

Configuration and administration features, including Telnet and (Cisco Discovery Protocol) CDP

Serial (AUX) and console ports for local and remote administration

Remote software download via Trivial File Transfer Protocol (TFTP) and Remote copy.A UNIX utility (RCP)

IP over DCC (data communications channel) for remote management of the Cisco 15104 OC-48/STM16 Optical Regenerator, where applicable

Optical receive power monitoring support on the OC-48 interface

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:

Cisco 10720 Internet Router Hardware Features

Hardware Field Replaceable Units

Software Features

Figure 1-1 Cisco 10720 Internet Router: AC (Top) and DC (Bottom) Power Supplies

Table 1-1 Cisco 10720 Internet Router Description

Physical Description

Dimensions

17.25 x 18.25 x 3.5 inches (2 RU)
(43.81 cm x 46.36 cm x 8.89 cm)
W x D x H

Input Power

Option 1: AC-input

100/240 VAC

50/60 Hz

300W (Dual)

Option 2: DC-input

-48/-60 VDC

300W (Dual)


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.

The uplink card slot provides the following options:

DPT or POS/DPT uplink card: one OC-48c/STM-16c DPT port or two POS optical ports with an aggregate bandwidth of approximately 5 Gbps

RPR/SRP uplink card: two OC-48 RPR/SRP (Resilient Packet Ring/Spatial Reuse Protocol) ports that support small form-factor pluggable (SFP) modules, with an aggregate bandwidth of approximately 5 Gbps

Console/auxiliary card: console and serial ports only

For more information about the uplink card, refer to the Cisco 10720 Internet Router Uplink Cards Installation and Configuration publication.

The Ethernet access card provides either Fast Ethernet or combined Fast Ethernet and Gigabit Ethernet connectivity. For more information about the access card, refer to the Cisco 10720 Internet Router Access Card Installation and Configuration publication.

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

1

Uplink card

2

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.

The Parallel eXpress Forwarding (PXF) network processors manage the data plane and support IP forwarding as well as advanced QoS features.

The multiple processors in the PXF process packets simultaneously at the rate of approximately
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

Access Card

Redundant Power Supply

Fan Assembly

Mounts

Cable Management

Uplink Cards

The uplink cards are available with one of the following:

One OC-48c/STM16c DPT uplink fiber-optic port or two POS uplink fiber-optic ports

Two RPR/SRP uplink fiber-optic ports supporting SFP modules

Console and serial (AUX) ports only

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)

1

Span West for RPR mode
Side A for SRP mode

6

Span East/Side B RX

2

Span West/Side A TX

7

Console port

3

Span West/Side A RX

8

Auxiliary port

4

Span East for RPR mode
Side B for SRP mode

9

Reset switch

5

Span East/Side B TX

   

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.

Optical power monitoring and 4.6-ppm clock accuracy

SONET OC-48/SDH-16c compliance

IP over DCC management interface

SRP

Key features supported by the RPR/SRP uplink card are listed below. For a more extensive list of features, consult your Cisco sales representative.

Optical power monitoring and 4.6-ppm clock accuracy

SONET OC-48/SDH-16c compliance

IP over DCC management interface

SRP

IEEE 802.17 RPR features

Small Form Factor pluggable (SFP) modules

Access Card

The access card is available in either of the following versions:

Fast Ethernet with support for copper and fiber-optic cabling

Combined Fast Ethernet and Gigabit Ethernet. The Fast Ethernet ports support copper or fiber-optic cabling and the Gigabit Ethernet ports use small form-factor pluggable (SFP) optical and copper modules.

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.

Fast Ethernet and Gigabit Ethernet connectivity

Ethernet Advanced Research Projects Agency (ARPA) MAC encapsulation

Time Domain Reflectometry (TDR) on 10/100BASE-TX

Autonegotiation for speed and duplex

2000 MAC addresses per port for Address Resolution Protocol (ARP)

1000 MAC addresses per Fast Ethernet port

Cisco IOS software configuration of Ethernet features

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.


Note Replace the fan assembly when a failure occurs. (See the "Removing and Installing the Router Fan Assembly" section on page 5-16.)


Mounts

The Cisco 10720 Internet Router can be mounted in the following ways:

Front, mid-, or rear rack mounting in any of the following standard mounting bracket sizes:

19-inch EIA (Electronics Industry Association)

23/24-inch EIA

ETSI (European Telecommunications Standards Institute)

Wall mounting

Desk mounting

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:

Cable-management tray for managing the cables

Cable-management cover to keep the cables from being accidentally stressed

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.

Cisco IOS Release 12.0 SP and Cisco IOS Release 12.0(29)S

IP routing protocols, including Intermediate Standard- Intermediate System (IS-IS), Open Shortest Path First (OSPF), Border Gateway Protocol-4 (BGP-4)

Ethernet features

Media dependent interface (MDI) and media dependent interface crossed (MDI-X) mode. (MDI mode is supported on revision B of the combined Fast Ethernet and Gigabit Ethernet access card, and in Japan on all access cards.)

10/100 speed auto-negotiation

Half-duplex/full-duplex (HDX-FDX) negotiation

Time Domain Reflectometry (TDR)

Spatial Reuse Protocol (SRP) features

SRP intelligent protection switching (IPS)

IPS wrap-time < 50 ms

SRP rate-limiting for TX traffic (high/low-priority queue)

SRP priority slicing for TX traffic

SRP fairness algorithm (SRP-fa)

9,000 maximum transmission unit (MTU)

SRP hold-off timer for protected SONET

Resilient Packet Ring (RPR) features

Intelligent Protection Switching (IPS): Steering mode or Wrapping mode

RPR Fairness: Per Station Fairness, weighted fairness, Conservative mode or aggressive mode

Topology: Advanced topology discovery combined with protection events

RPR classes: Support for classes A, B, and C in transit and Class A and B for transmit and receive

RPR keepalive timer and L1 Holdoff timer

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:

Network Equipment Building Systems

Electromagnetic Compatibility

Bonding and Grounding

Environmental Monitoring

Shock and Vibration

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:

Earthquake environment and criteria

Office vibration and criteria

Transportation vibration and criteria