Carrier Routing System 1

Carrier Routing System

Cisco CRS-1 Backbone Core Router

Carrier Routing System or CRS is a modular and distributed corerouter developed by Cisco Systems Inc that enables service providersto deliver data, voice, and video services over a scalable IPNext-Generation Network (NGN) infrastructure. In a networktopology, these routers are generally positioned in the core or edge of aservice provider network. They are also used by Over-the-top contentproviders and large enterprises. It supports a wide range of interfacespeeds and types such as channelized OC3, OC12 to OC768 on Packetover SONET and from 1GE, 10GE all the way to 100GE on theEthernet technologies. A standalone CRS-3 system can handle2.2Tbit/s and a multi-chassis system could be designed to handle322Tbit/s.

Architecture

Cisco CRS-1 Backbone Core Router

A standalone Carrier Routing System is deployed with a Line cardchassis (LCC). The three main functional units of this LCC are theLine cards, Switching fabric and Route processor. The Line cardconsists of the physical interface card and a modular services card. Thephysical connectivity could be using Fiber optic cables or usingTwisted pair cables. The routing decisions are made by the routeprocessor and the switching fabric takes care of the routing based onthe Route processor input. The CRS runs IOS XR which is said to bedesigned for high-end carrier grade routers and was launched withCRS-1. In a multi-chassis deployment, the Line card chassis is usedalong with another variety of chassis called as the Fabric Card Chassis(FCC). The architecture enables scalability by increasing the numberof Line Card Chassis and/or Fabric Card Chassis. In both single- and multi-chassis configurations, the CRS switchfabrics are based on a three-stage Bene architecture. In a single-chassis system, the three switching stagesS1, S2,and S3are all contained on one fabric card. In a multi-chassis system, the S2 stage is contained within the FabricCard Chassis, with the S1 and S3 stages resident in the Line Card Chassis.

The CRS Line card chassis comes in three different flavors: 4-slot, 8-slot and 16-slot. The number of slots indicatesthe number of line cards that the chassis can accommodate. There is only one variety of Fabric card chassis.

4-slot 8-slot 16-slot

Carrier Routing System 2

DeploymentInternet service providersMobile network operatorOver-the-top contentWireline services, Service providers P, PE, PeeringLarge Enterprises

Product Portfolio

CRS-XCisco Systems Inc has announced the addition of a new product to its existing CRS family, the Carrier RoutingSystem X, or CRS-X(C-R-S-Ten), which is expected to be 10 times faster than the first CRS model(CRS-1) thecompany offered, back in 2004.[1] CRS-X is said to be a 400Gbit/s per slot system and is backward compatible withthe previous generation HW. At the time of launch, CRS-X family has three different flavors of physical interfacecard (40x10GE, 4x100GE and 2x100GE-Flex-40) apart from the improved fabric and modular service cards.

Chassis CRS-X 16 Slot CRS-X 16 Slot:Back-to-Back CRS-X Multi-Chassis

No. of forwarding slots 16 32 Up to 1152

Aggregate Switching Capacity 12.8 Tbit/s 25.6 Tbit/s Up to 921.6 Tbit/s

Cisco states that the CRS-X can be used in back-to-back & multi-chassis deployments and that CRS-1, CRS-3 &CRS-X can co-exist in a multi-chassis setup. The press release (reference) also claims that, the CRS-X 400 GE LineCard with Cisco AnyPort Technology uses Ciscos CMOS photonic CPAK to reduce power consumption, heatdissipation and increase 100 GE port densities by a factor of three compared to competitive solutions. The UniversalPort concept adds the option of using a 100G port as 2 ports of 40G or 10 ports of 10G. 40G can again be used as 4ports 10G. This product will go up against Juniper Networks T4000 and PTX core routing systems and perhapsAlcatel-Lucents 7950 XRS.

Carrier Routing System 3

CRS-3The CRS-3 is the second generation of the CRS series launched in March, 2010. In CRS-3 each line card slot has acapacity of 140Gbits/s, which is more than three times the capacity of the previous CRS-1 generation. Thearchitecture is retained as in the previous generation and hardware is compatible with the CRS-1 system. Apart fromthe single-chassis system and the multi-chassis system, CRS-3 supports back-to-back configuration as well. In thisconfiguration, two Line Card Chassis are connected back-to-back and there is no Fabric Card Chassis involved as inthe case of a multi-chassis configuration. This configuration works only for the 8-slot and 16-slot chassis models.CRS-3 also supports IPoDWDM. This solution reduces transport elements, while supporting multilayer features suchas proactive protection and control plane interaction, reducing operating expenses and capital costs. AT&TCorporation tested the CRS-3 in a live-network using the 100Gb Ethernet backbone and the Dutch telco KPNTelecom selected the CRS-3 platform for their new NextGen IP backbone.[2]

Model Number of slots Max. Full-Duplex throughput per system Link to product-specs

CRS-3 4 slotsingle shelf

4 1.12 Tbit/s Cisco CRS-3 4-Slot Single-Shelf System [3]

CRS-3 8 slotsingle shelf

8 2.24 Tbit/s Cisco CRS-3 8-Slot Single-Shelf System [4]

CRS-3 16 slotsingle shelf

16 4.48 Tbit/s Cisco CRS-3 16-Slot Single-Shelf System [5]

CRS-3 multishelf platform 1152 322 Tbit/s Cisco CRS-3 24-Slot Fabric-Card Chassis [6]

CRS-1CRS-1 is the first generation of Carrier Routing System launched in 2004. This replaced the Cisco 12000 routerswhich were used as core routers. Each slot of CRS-1 has a capacity of 40Gbit/s. CRS-1 supports both standalone andmulti-chassis configurations.

Model Number of slots Max. Full-Duplex throughput per system Link to product-specs

CRS-1 4 slotsingle shelf

4 320 Gbit/s Introducing the 4 slots CRS-1 [7]

Interactive presentation CRS-1:4 [8]

CRS-1 8 slotsingle shelf

8 640 Gbit/s Introducing the 8 slots CRS-1 [9]

Cisco CRS-1 8-Slot Single-Shelf System [10]

CRS-1 16 slotsingle shelf

16 1.2 Tbit/s Presentation of 16 slots CRS-1 [11]

Cisco CRS-1 16-Slot Single-Shelf System [12]

CRS-1 multishelf platform 1152 92 Tbit/s General brochure for the CRS-1 series [13]

Cisco CRS-1 24-Slot Fabric-Card Chassis [14]

Carrier Routing System 4

References[1] Cisco newsroom Cisco Adds Carrier Routing System X (CRS-X) Core Router to Industry-Leading CRS Family (http:/ / newsroom. cisco.

com/ dlls/ 2010/ prod_030910. html?sid=BAC-JsSynd)[2] Press coverage Cisco CRS-3 router (http:/ / newsroom. cisco. com/ dlls/ 2010/ prod_030910. html?sid=BAC-JsSynd), visited 5 August 2010[3] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ CRS-3_4-Slot_DS. html[4] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ CRS-3_8-Slot_DS. html[5] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ CRS-3_16-Slot_DS. html[6] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ data_sheet_c78-408226. html[7] http:/ / www. cisco. com/ en/ US/ products/ ps7041/ index. html[8] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ ps7041/ prod_presentation0900aecd8056e757. html[9] http:/ / www. cisco. com/ en/ US/ products/ ps6112/ index. html[10] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ ps6112/ product_data_sheet0900aecd801d53a1. html[11] http:/ / www. cisco. com/ en/ US/ products/ ps5862/ index. html[12] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ ps5862/ product_data_sheet09186a008022d5f3. html[13] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ prod_brochure0900aecd800f8118. pdf[14] http:/ / www. cisco. com/ en/ US/ prod/ collateral/ routers/ ps5763/ ps5862/

product_data_sheet0900aecd80340baa_ps5763_Products_Data_Sheet. html

External links New Cisco core router boasts 10X capacity of original (http:/ / www. networkworld. com/ news/ 2013/

061213-cisco-router-270682. html) X' Marks Cisco's NewCore-Router Upgrade (http:/ / www. lightreading. com/ core-routers/

x-marks-ciscos-new-corerouter-upgrade/ 240156497) Cisco Plans To DoubleThe Speed Of The Internet (http:/ / money. cnn. com/ 2013/ 06/ 12/ technology/ enterprise/

cisco-internet-speed/ index. html) Introduction to CRS - video (http:/ / www. youtube. com/ watch?v=hU5EWZRYFJc) CRS-3 Video datasheet (http:/ / www. cisco. com/ en/ US/ prod/ routers/ ps5763/

cisco_crs-3_routers_video_data_sheet. html) Cisco CRS-1 & CRS-3 (http:/ / www. cisco. com/ en/ US/ products/ ps5763/ index. html) Cisco CRS-1 & CRS-3 Datasheets (http:/ / www. cisco. com/ en/ US/ partner/ products/ ps5763/

products_data_sheets_list. html) Cisco IOS XR Software General Information (http:/ / www. cisco. com/ web/ Cisco_IOS_XR_Software/ index.

html) Major CRS-1 Deployments (http:/ / newsroom. cisco. com/ press-release-content?type=webcontent&

articleId=4493058) Source (http:/ / newsroom. cisco. com/ dlls/ global/ asiapac/ news/ 2005/ pr_05-24. html) Cisco CRS 1 News Release (http:/ / newsroom. cisco. com/ dlls/ 2004/ hd_052504c. html) Cisco CRS-1 Architecture Inside Analysis(Chinese Version) (http:/ / www. tektalk. cn/ ?p=4435) Cisco CRS-3 Press Release (http:/ / newsroom. cisco. com/ dlls/ 2010/ prod_030910. html) Cisco says new monster CRS-3 router paves way for more powerful Internet (http:/ / www. networkworld. com/

news/ 2010/ 030910-cisco-internet. html)

Article Sources and Contributors 5

Article Sources and ContributorsCarrier Routing System Source: http://en.wikipedia.org/w/index.php?oldid=572836439 Contributors: Aacurtis, Adrianwn, Akc9000, Alan Au, Alistair1978, Amalas, Anuragkothari, Archdude, Benandorsqueaks, Bodogbodog, Bvenkat2, Cacophony, Caffineehacker, Carlesso, Cisco-router-switch, Conquerist, ContivityGoddess, Dman727, Erikev, Flonase, Fplay, Fsiler, Fudoreaper,GDW13, Gaborheja, Gidonb, Giraffedata, Inkling, John of Reading, Lightmouse, LilHelpa, MARQUIS111, Ma8thew, Maande10, Mark Bergsma, Mild Bill Hiccup, Mjohnste, MrXR,PAStheLoD, Radagast83, Rokfaith, Serksimper, SouthLake, Srivatsand, Studerby, TastyPoutine, Team4Technologies, The dollar man rules, Thue, Tonkie67, Ttwaring, Wkumari, Yaronf, Zul32,44 anonymous edits

Image Sources, Licenses and ContributorsImage:Cisco-rs1.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Cisco-rs1.jpg License: GNU Free Documentation License Contributors: GreyCat, Josette, Siebrand, 1 anonymouseditsImage:-CRS multi-chassis.png Source: http://en.wikipedia.org/w/index.php?title=File:-CRS_multi-chassis.png License: Creative Commons Attribution-ShareAlike 1.0 Generic Contributors:Cisco SystemsImage:CRS quarter.jpg Source: http://en.wikipedia.org/w/index.php?title=File:CRS_quarter.jpg License: Creative Commons Attribution-ShareAlike 1.0 Generic Contributors: Cisco systemsImage:CRS halfq chassis.jpg Source: http://en.wikipedia.org/w/index.php?title=File:CRS_halfq_chassis.jpg License: Creative Commons Attribution-ShareAlike 1.0 Generic Contributors:Cisco SystemsImage:CRS line card chassis.jpg Source: http://en.wikipedia.org/w/index.php?title=File:CRS_line_card_chassis.jpg License: Creative Commons Attribution-ShareAlike 1.0 GenericContributors: Cisco Systems

LicenseCreative Commons Attribution-Share Alike 3.0//creativecommons.org/licenses/by-sa/3.0/

Carrier Routing SystemArchitecture DeploymentProduct PortfolioCRS-XCRS-3CRS-1

ReferencesExternal links

License