Cisco 12000 Series IP Backbone Routers

Cisco 12008 Series, Front View

Features

• Modular, multigigabit crossbar switching fabric allows bandwidth to scale in either 40Gbps (12008), 60Gbps (12012), or 80 to 320 Gbps (12016).

• High density, high speed interfaces ranging from DS3 to OC48c/STM16c, that can be easily added as needed.

• Packet over SONET/SDH interfaces at 155 Mbps (OC3/STM1), 622 Mbps (OC12c/STM4c) and 2.5 Gbps (OC48c/STM16c) data rates

• Asynchronous Transfer Mode (ATM) interfaces at 155 Mbps (OC3/STM1) and 622 Mbps (OC12c/STM4c) data rates

• LAN interfaces 1 Gbps (Gigabit Ethernet) and others to follow

• Frame based interfaces (PPP, Frame Relay) at 45 Mbps (DS3), 155 Mbps (OC3/STM1), 622 Mbps (OC12c/STM4c)

• Channelized interfaces at 622 Mbps (OC-12) channelized to 45 Mbps (DS-3) and 622 Mbps (OC-12/STM-4) channelized to 155 Mbps (OC-3/STM-1)

• Scalable Performance

• Innovative switch fabric design supports virtual output queues (VoQs) that eliminate head-of-line blocking (HOLB) and increase overall system efficiency and supports partial fulfillment for multicast traffic where replication of multicast traffic is performed by the switch fabric.

• Distributed architecture delivers scalable Layer 3 switching performance through intelligent line cards that can be added incremental interfaces are required

• Micro-programmable application specific integrated circuits (ASICs) based queuing provides line rate forwarding for unicast and multicast traffic that fills SONET/SDH transmission facilities to capacity, ensuring best return on investment on expensive bandwidth.

• Gigabit speed interconnections between line cards (5 Gbps per slot)

• State-of-the-art scheduling algorithm combined with Virtual Output Queues to eliminate head-of-line blocking (HOLB) achieving 99% efficiency

• Hardware based multicast

• High Availability via redundancy (1:4 for SFC, 1:1 for CSC) with loss-less failover and hot-swap capability.

• Gigabit Route Processor

  The Gigabit Route Processor (GRP) is a high performance engine that provides the routing intelligence for the Cisco 12000 Series. It is dedicated to determining the network topology and calculating the best path across the network. The GRP has the following hardware characteristics:

• 200 MHz R5000 CPU

• Optionally up to 256 MB CPU DRAM (default 64 MB)

• 512 KB Layer 2 cache

• 512 KB configuration NVRAM

• 8 MB boot Flash

• Two PCCMIA Type II software upgrades

• Ethernet (RJ45 and MII connectors) for Network Management access

• Local Console and modem ports (DB-25 EIA/TIA-232c)

• Process Interior Gateway Protocols (IGP) such as IS-IS, IGRP, EIGRP to determine the network topology

• Process External Gateway Protocols (EGP) such as BGP

• Create and maintain the routing table (up to 1 million route entries)

• Distribute and update Express Forwarding (EF) tables on the line cards and maintain copies of each line card`s EF tables for card initialization

• General maintenance functions such as diagnostics, console support and line card monitoring

• In-band management through SNMP MIB, Telnet, BOOTP and TFTP

• Line Card

  Line cards connect the Cisco 12000 Series to other devices via electrical or optical media. The line cards are designed for the transmission of IP packets over PPP, Frame Relay or ATM interfaces. The features and functions of the line cards are interface specific.

Packet over SONET/SDH (POS)

POS interfaces on the Cisco 12000 Series enable connections to other Cisco 12000 Series or other Cisco routers, such as Cisco 7500 or 7200 via optical interfaces. These interfaces can be circuits provisioned over a SONET/SDH infrastructure or dark fibers (native fiber links) connections or wavelengths of Wave Division Multiplexing (WDM) systems. The Cisco 12000 Series offers the following POS interfaces:

• 4 OC3/STM1 ports per line card

• 1 OC12c/STM4c ports per line card

• 4 OC12c/STM4c ports per line card

• 1 Channelized OC12 port (to DS3) per line card

• 1 Channelized OC12/STM4 port (to STS3c/STM1) per line card

• 1 OC48c/STM16c ports per line card

Asynchronous Transfer Mode (ATM)

ATM interfaces on the Cisco 12000 Series enable connections to other Cisco 12000 Series or other Cisco routers, such as Cisco 7500 or 7200 via ATM networks. The Cisco 12000 Series offers the following ATM interfaces:

• 4 OC3/STM1 ports per line card

• 1 OC12c/STM4c ports per line card

Ethernet

Gigabit Ethernet (GE) and Fast Ethernet (FE) interfaces on the Cisco 12000 Series enable connections to other Cisco 12000 Series or other Cisco routers, such as Cisco 7500 or 7200 via fiber optic links. The Cisco 12000 Series offers the following Gigabit Ethernet interfaces:

• 1 GE port per line card

• 8 port FE line card

Dynamic Packet Transport (DPT)

Dynamic Packet Transport allows reliable high-performance fiber optics communications to other Cisco routers enable connections to other Cisco 12000`s or other Cisco routers, such as Cisco 7500 without much of the management required by POS TDM connections. It is currently implemented in an OC-12 line card. :

• OC-12 one-port line card

Line Card and GRP Memory Options

There are two configurable memory types on the GRP:

• Flash (PCMCIA)

• DRAM used to hold system software, routing tables, and other data

Default GRP memory is 20 MB PCMCIA Flash, and 128 MB DRAM, expandable to 256 MB

There are two configurable memory types on each of the Cisco 12000 line cards:

• Packet memory (buffers)

• Route table memory

Default route table memory is 64 MB.

Default packet memory 128 MB (64 MB Tx, 64 MB Rx) or 256 MB (128 MB Tx/128 MB Rx) - Line card dependent

For more information on Cisco 12000 line card and memory options, see

Cisco 12000 Documentation

Description	Product Number
Regulatory Compliance and Safety Information for the Cisco 12000 Series Gigabit Switch Router	78-4347-01
Cisco 12008 Installation and Configuration Guide	78-4953-01
Cisco 12008 AC Input Power Supply Replacement Instructions	78-4954-01
Cisco 12008 DC Input Power Supply Replacement Instructions	78-4955-01
Cisco 12000 Memory Replacement Instructions	78-4338-02
Cisco 12000 Route Processor Installation and Configuration	78-4339-02
Cisco 12008 Switch Card Replacement Instructions	78-4956-01
Cisco 12008 Fan Tray Replacement Instructions	78-4957-01
Cable-Management System Replacement Instructions	78-4958-01
Quad OC-3c/STM-1 Packet Over-SONET Line Card Installation and Configuration	78-4333-02
OC-12c/STM-4 Packet Over-SONET Line Card Installation and Configuration	78-4341-02
Asynchronous Transfer Mode Line Card Installation and Configuration	78-4344-02
Cisco 12008 Packing/Unpacking Instructions	78-4960-02