CRS-1概览.ppt

1、The Cisco CSR-1: A Technical Overview,RST-2453,Agenda,The CRS-1 Cisco IOS-XR,What Would You do with 90 Terabits per Second?,Next-Generation Core Requirements“Must Haves”,Must Resolve These Inherently Conflicting Requirements,Massive Scale,Single-System Simplicity,with,with,Continuous Availability,Se

2、rvice Flexibility,Service Flexibility Without Disruption,Massive Capacity That Acts as a Single System,with,Service Performance,Service Intelligence,Capacity and Investment Protection for New Features and Services Without Performance Compromises,Redefining IP Networks:The Cisco Carrier Routing Syste

3、m-1,Many Services, One Network, Limitless Possibilities,System Longevity,Service Flexibility,Continuous System Operation,The CRS-1,System overview Line card Switch fabric Control plane Mechanicals System configurations,Line Card Shelves,Fabric Shelves,Cisco CRS-1 System OverviewTwo Main System Build

4、ing Blocks,100m,Front: 24 Fabric Cards 2 SC Cards,Back: Optical Fiber Interconnect Panels,Optical backplane Redundant fans/power,Front: 16 or 8 Interface Slots 2 RP Slots,Back: 16 or 8 LC Slots 8 or 4 Fabric Card Slots,Mid-plane design Redundant fans/power,Cisco CRS-1 System ConfigurationsTwo Basic

5、Configurations,16/8 LC and PLIM slots No fabric chassis required,Multi-Chassis Config (1.2Tbps to 92Tbps),X (1 to 72) line card chassis Y (1 to 8) fabric chassis,Standalone Config (640Gbps or 1.2Tbps),Basic Router Architecture,Control Components,Forwarding Component,Interconnect,Three Main Component

6、s: Line Cards, Switching Mechanism, Router Processor(s),Cisco CRS-1 System ArchitectureDistributed Basics of the Architecture,Interface Module,Mid-plane,Line Card,Line Card,8 of 8,2 of 8,1 of 8,S1,S1,S2,S2,S3,S3,S1,S2,S3,Fabric Chassis,Cisco PSE,Cisco PSE,Modular Service Card,8K qs,8K qs,Up to 1,152

7、 40G line cards (independent forwarding) Highly programmable PSE supporting 40G line rate performance Robust queuing with8K per ingress/egress,1296x1296 non-blocking buffered fabric 1:N redundancy Service intelligence with hi/lo priority uni-cast/multicast recognition,Multiple control processors (RP

8、s, DRPs) Control SW distributed across all processors,Flexible Forwarding Plane,Distributed Control Plane,Multistage Switch Fabric,Cisco CRS-1 Control PlaneCisco IOS-XR Control Plane Processing Components,Distributed Route Processors Two SMPs per DRP Occupy one MSC slot and one PLIM Control processi

9、ng for routing protocols (BGP, OSPF, IS-IS), network mgt, traffic engineering (RSVP, LDP), etc. Acts as additional processing element for control processing or as boundary for Service Domain Router Route Processors One SMP per RP Two dedicated RP slots per line card shelf Control processing for rout

10、ing protocols (BGP, OSPF, IS-IS), network mgt, traffic engineering, etc. LC chassis management Always in redundant configurationactive and standby,SMP,SMP,SMP,SMP,SMP,SMP,1 of 8,2 of 8,3 of 8,Route Processors,Distributed RPs,Segue Slides,Line Cards,Cisco CRS-1 Line Card OverviewPLIM/MSC Architecture

11、,Modular Services Card (MSC) Packet switching engine 40G of line rate forwarding capability (IPv4) Hardware-based prefix lookup for (IPv4/IPv6/MPLS) Flexible microcoded massively parallel forwarding engine Extensive queuing capability 8K queues ingress/egress Configurable mapping 800 Mhz PPC 2GB CPU

12、 memory/2GB packet memory PLIM and Modular Interfaces 4-Port OC-192c/STM-64c 16-Port OC-48c/STM-16c POS OC768c/STM256 POS OC768c/STM256 POS tunable WDMPOS 8x10GE (XENPACK optics inc DWDM options) 4x10GE tunable WDMPHY SPA modules,Modular Services Card,IngressQueuing,RX PSEL3 Engine,CPU,Cpuctrl,From

13、Fabric ASIC,TX PSE L3 Engine,EgressQueuing,M I D P L A N E,Interface Module ASIC,OC192Framer and Optics,OC192Framer and Optics,OC192Framer and Optics,OC192Framer and Optics,Interface module,To fabric,From PLIM,To PLIM,From Fabric,Ingress Packet Flow,Egress Packet Flow,CRS-1 Line Card,Line Card CPU,E

14、gress PSE,Ingress PSE,IngressQ,Power Regulators,Service Processor,FabricQs,EgressQ,CRS-1 Line Card OverviewWDMPOS/WDMPHY PLIMs,WANPOS OC768 bandwidth-compressed signal on 50GHz grid, C-Band tunable, 50GHz spacing 40G over existing 10G DWDM systems WANPHY PLIM uses ONS technology providing four 10GE

15、C-band tunable, 50GHz spacing interfaces,SIPs and SPAs,A SIP is a physical layer interface module (PLIM) that inserts into a line card chassis slot like any other PLIM; it provides no network connectivity on its own MSC is connected to the SIP in the same manner as the current Fixed PLIMs CRS-1 SIP

16、will house up to six Shared Port Adapters (SPA) which are installed in subslots; the SPA provides the interface ports and media type SPAs may be single height or double-height depending on the required accommodation,SIPs and SPAs,SIPs and SPAs,Current SPAs 1-Port OC-192c/STM-64c POS XFP SPA 8-Port G

17、igabit Ethernet SPA 4-Port OC-3c/STM-1 POS SPA 8-Port OC-3c/STM-1OC-12c/STM-4 POS SPA MSC Oversubscription is supported for Ethernet SPAs only More SPA variants to be supported in future releases,CRS-1 Line Card OverviewSPA Jacket Card PLIM and SPA Modules,Cisco CRS-1 Packet FlowFlexible Forwarding

18、with PSE (Ingress/Egress),IPv4/IPv6 Unicast MPLSsix labels Link bundling (v4/v6) Load balancing L3 (v4/v6) L3VPN PE TE/FRR Hierarchical policing Marking WRED Shaping Sampled NetFlow ACL IPv4/IPv6 multicast Per prefix accounting GRE/L2TPv3 tunneling RPF check (loose/strict) v4,M I D P L A N E,From PL

19、IM,ToPLIM,TX PSEL3 Engine,EgressQueuing,RX PSEL3 Engine,To IngressQueuingASIC,From FabricASIC,Broad Feature Support with Programmability and Performance,OC192Framer and Optics,Interface Module ASIC,OC192Framer and Optics,OC192Framer and Optics,OC192Framer and Optics,Cisco CRS-1 Packet FlowPacket Swi

20、tching Engine Architecture,Parallel processor architecture IBMs Cu-11 ASIC process 188 Packet Processing Engines (PPE) Packets evenly distributed across PPEs Each PPE is a 32-bit RISC processor 250MHz 48,000 MIPS Fully programmable Tree-bit map prefix look-up HW engine Integrated with key-off-chip m

21、emories 512K entry TCAM for feature scale (ACLs/netflow/policing/etc) 2M entries for IPv4/IPv6/multicast/MPLS lookup 1M 64Bit stats counters,TCAM,PLU,TLU,STATS,PPE188,PPE3,PPE2,PPE1,MUX,Distrib,Configurable Dynamic Mapping of Queues to Ports,To Fabric,MDRR/ Aggregate Shaper,Shaping Min/max BW,Max BW

22、,Queues,Ports (Port/VLAN),HP,LP,LP,P1,P2,P1023,WRED,From PSE,CRS-1 Packet FlowInput Queuing/Shaping on the IngressQ,Groups (VLAN/Tunnel),Configurable Dynamic Mapping of Queues to Groups and Ports,Shaping Min/max BW,Queues,Ports (Port/VLAN),HP,LP,LP,P1,PX,WRED,G1,G2,GX,MDRR/ Group,MDRR/ Group,MDRR/ A

23、ggregate Group,Max BW,CRS-1 Packet FlowOutput Queuing/Shaping on the EgressQ,To Fabric,From PSE,Segue Slides,Switch Fabric,Cisco CRS-1 Switch Fabric Overview,1 of 8,2 of 8,8 of 8,1,2,8,1,2,16,40 Gbps,Line Card,Line Card,50 Gbps136 Bytes Cells,Fabric Chassis,100 Gbps/LC(2)(2.5X Speedup),1296 X 1296 B

24、uffered Non-blocking SwitchMultistage InterconnectThree Stage Benes Topology,S1,S2,S3,S1,S2,S3,S1,S2,S3,Two Levels of Priority HP Low Latency Traffic LP Best Effort Traffic,Multicast Support 1M Multicast Groups,Note: In CRS-1 16-slot, eight planes are distributed across eight fabric cards; in CRS-1

25、8-slot, planes are distributed across four fabric cards,Cisco CRS-1 Switch Fabric ConfigurationsTwo Basic Configurations,All Configurations Up-gradable Without Service Interruption,S1,S2,S3,S1,S2,S3,1.2tbps Stand-aloneThree-stages of Fabric in LC Chassis,1.2 Tbps to 92 TbpsDistributed FabricOptical

26、Connection Between Stages,S1,S2,S1,S3,S2,S3,S3,S3,1x,1x,2X,2X,Line Card Chassis 1,Fabric CardChassis 1,Line CardChassis 2,Multi-Chassis,Multi-Chassis,Multi-Chassis TechnologyBuilding Blocks,A fabric plane can span multiple S2 boards Multiple fabric planes can be supported in a fabric chassis,1,0,2,3

27、,4,5,6,7,1,0,2,3,5,4,6,7,0,1,2,3,4,5,6,7,1 FCC,2 FCCs,4 FCCs,Key Points,Multi-Chassis TechnologyBuilding Blocks,0,8 FCCs,1,2,3,4,5,6,7,Cisco CRS-1 Switch Fabric InterconnectOptical Inter-Connection,12 fibers per ribbon Six ribbons per array cable(72 fibers per array cable),Multiple Array Cables Betw

28、een LC Chassis and FC Chassis,Fiber Array Cable,Connections per Line Card Chassis,Three array cables per fabric card Eight fabric cards 24 array cables,Connections per Fabric Card Chassis,Nine array cables per fabric card 24 fabric cards 216 array cables,Cisco CRS-1 Switch Fabric InterconnectS13 and

29、 S2 Board Pictures,Packet FlowLC to LC,Port to IngressQ Via PSE ASIC IngressQ to S1 Cells via midplane to eight LCC fabric cards S1 to S2 S1 distributes cells across links to available S2s S2 to S3 S2 distributes cells across links to available S3s S3 to FabricQ Via midplane FabricQ to Port Via PSE

30、and EgressQ,Port,Line Card Chassis (LCC),Line Card,Fabric Card,IngressQ,FabricQ,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,Port,S2,S2,S2,S2,S2,S2,S2,S2,Line Card Chassis (LCC),Fabric CardChassis (FCC),Line Card,Fabric Card,IngressQ,FabricQ,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,S1,S3,S2,S2,P

31、acket Flow Between LCs,Multi-Chassis,Phased releases going above 1.2Tb being driven by customer requirements Current requirements are for two line card chassis and up to four fabric chassis but this is growing,Eight S13 Boards,Eight S2 Boards and OIMs,Two LCC + One FCC System Cabled,Multi-Chassis,Me

32、chanicals,Cisco CRS-1 System MechanicalLine Card Chassis Overview16 Slot-Full Rack Unit,Slots (midplane design): Front 16 PLIM slots Two RP slots + two fan controllers Back 16 LC slots Eight fabric cards Dimensions: 23.6 W x 41* and D x 84 H (60 W x 104.2 D x 213.36H (cm) Power: 12 KW (AC or DC) Wei

33、ght: 1,600 lbs/723kg Heat Dis.: 41,000 BTUs,*For standalone chassis depth = 35 (no fabric chassis cable management),Cisco CRS-1 System MechanicalLine Card Chassis OverviewEight Slot-Half Rack Unit,Slots (Midplane design): Front Eight PLIM slots Two RP slots Back Eight LC slots Four fabric cards Dime

34、nsions: 17.5 W x 41* D x 38.5 H (44.5 W x 104.2 D x 97.8H (cm) Power: 7.5 KW (AC or DC) Weight: 647 lbs/294kg Heat Dis.: 25,196 BTUs,Cisco CRS-1 System MechanicalFabric Card Chassis Overview,Slots: 24 Switch Fabric (SF) boardshas both S2 ASICs and Optics Backplane design (cables blindmate to rear co

35、nnector modules) Dimensions: 23.6 W x 41* D x 84 H (60 W x 104.2 D x 213.36H (cm) Power: 8 KW (AC or DC) Weight: 1,600 lbs/723kg Heat Dis.: 31,000 BTUs,*For standalone chassis depth = 35 (no fabric chassis cable management),Multi-Chassis,System Configurations,640Gbps/1.2 Tbps System,8/16 LC and PLIM

36、 slots Two RP slots No fabric chassis required S1/2/3 fabric cards,Standalone LC Chassis,3.6 Tbps System,11.52Tbps System,23 Tbps System,92 Tbps System,Cisco IOS-XR,Multi-Chassis,Router OS Evolution,Router OS Evolution,Control Plane Applications,Forwarding Plane Applications,Network Stack,System Inf

37、rastructure,ForwardInfrastructure,OS Scheduler,Management Plane Applications,HA Infrastructure,Control Plane,Data Plane,Management Plane,Control Plane,Data Plane,Management Plane,Control Plane,Data Plane,Management Plane,BGB,RIP,ISIS,OSPF,Routing,PIM,IGMP,RIB,L2 Drivers,ACL,FIB,QoS,LPTS,Host Service

38、,PFI,Interface,CLI,SNMP,XML,Netflow,Alarm,Per.fMgmt,SSH,SSH,SSH,Checkpoint DB,Multicast IPC,System DB,Distributed Infrastructure,Memory Mgmt,IPC Mech,Synch. Services,Scheduler,Kernel System Services,New Router OS Architecture Is Required to Deliver: Continuous system operation Scalability Flexible s

39、ervice delivery Single unified system view,Monolithic Kernel (BSD/Linux, NT) MMU with partial protection Applications are protected,TRUE Microkernel (Mach, QNX) MMU with full protection Applications, drivers, and protocols are protected,Cisco IOS-XR Software Architecture OverviewPicking the Correct

40、OS to Meet CRS Software Requirements,ProcessManager,File System,Application,Driver,Application,Application,Kernel,File System,Network,Driver,Fault,Fault,Fault,Contained (Restartable),System Wide Corruption,Contained (Restartable),Contained (Restartable),m,K,Fault,Cisco IOS-XR KernelKey Benefits,Mult

41、i-Chassis,Distributed Infrastructure,Distributed Forwarding Infrastructure,Single Stage Forwarding Single global Adjacency Information Base (AIB) distributed to all line cards Single global Interface Management DB distributed to all line cards Forwarding feature code run in RP,Two Stage Forwarding E

42、ach line card has independent AIB only for local interfaces Each line card has independent Interface DB for local interfaces Forwarding features independently run in LCs,Switching Fabric,RP,LC,LC,CPU,CPU,GlobalIDB this logical router shares all common chassis resources except RP and LCs Virtual secu

43、re domain routers A routing entity that emulates (via software-based partitioning), multiple virtual routing entities; a virtual router shares all common chassis resources; can have dedicated/shared RP and LC VRF Multiple routing table and multiple forwarding table instances,LC,LC,LC,LC,LC,LC,RP,RP,D R P,D R P,LC,LC,LC,LC,LC,LC,F A N C,F A N C