【正文】 ted subsystems/processesSystem servicesControl plane169。2/ 61Version Kernel?Memoryprotection, messagepassing, preemptive?Modular software design?All basic OS and router functionality implemented as processes?Process model with separate, protected address spacesMicrokernel:ThreadsSchedulingDebugTimersMessage queuesSynchronizationDistributed processingFile systemLightweight messagingEvent managementCISC OPOSIXApplications169。2/ 60Version HighAvailability (HA) Components?Kernel?Plane separation?Fault tolerance and isolation?Checkpoint support for process restart?Processlevel redundancy?Route processor and Distributed RP failover?Nonstop forwarding169。2/ 59Version Cisco IOS XR ArchitectureCisco IOS XR kernelDistributed infrastructureRoutingmodules(BGP, OSPF)Protocolmodules(IP)ApplicationmodulesRuns onmultiple CPU’s169。XR軟件是使用搶占多任務(wù)處理、內(nèi)存保護(hù)、快速內(nèi)容交換機(jī)制的微內(nèi)核操作系統(tǒng)n 微內(nèi)核操作系統(tǒng)包括內(nèi)存管理、任務(wù)調(diào)度、同步服務(wù)、內(nèi)容交換、以及進(jìn)程間通信在內(nèi)的基本操作系統(tǒng)功能169。2/ 58Version Cisco IOS XR高級(jí)介紹n Cisco2/ 57Version Cisco IOS XR高級(jí)介紹n 高度可擴(kuò)展性n 分布式轉(zhuǎn)發(fā)架構(gòu)n 極高的可靠性n 服務(wù)分離和靈活性n 健壯的安全性n 軟件構(gòu)件模塊化n 層次性配置和健全的配置管理n 更優(yōu)的可管理性169。2/ 56Version 操作系統(tǒng)基本功能n 進(jìn)程調(diào)度n 中斷處理n 內(nèi)存管理n 同步n 進(jìn)程間通信（ IPC）n 動(dòng)態(tài)鏈接庫n 可移植操作系統(tǒng)接口（ POSIX）169。169。CRS1Essentials—ModuleEssentials—Module令牌環(huán)、 FDDI、交換多兆位數(shù)據(jù)服務(wù)（ SMDS） 某些協(xié)議如今已經(jīng)變成了業(yè)界標(biāo)準(zhǔn)，而某些仍是廠商私有 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. CiscoCRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1Essentials—ModuleEssentials—ModuleEssentials—Module169。2/ 1Version 目錄?CRS1 硬件架構(gòu)介紹?CRS1 IOSXR介紹?CRS1 IOSXR基本配置?CRS1 IOSXR 路由協(xié)議配置?CRS1 IOSXR RPL配置介紹169。2/ 2Version Cisco CRS1 Routing System OverviewNext Generation Core? 40 Gbps routing? Multishelf scale? Foundation for core consolidation CRS1169。2/ 3Version Cisco CRS1 System Configurations? Single Shelf System? 8 or 16 MSC and PLIM slots? No Fabric chassis required4 or 8 Fabric cards in line card chassis? Multishelf System ( TO 92T)2 to 72 16slot line card chassis39。Essentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleEssentials—ModuleCRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1CRS1OSI層12ATM、 FrameRelay3n 網(wǎng)絡(luò)運(yùn)營商具有多張?zhí)囟ǚ?wù)網(wǎng)絡(luò)：服務(wù)的傳輸網(wǎng)絡(luò)n 運(yùn)營商積極地向融合性網(wǎng)絡(luò)進(jìn)行遷移169。2/ 53Version 網(wǎng)絡(luò)演變?nèi)缃竦木W(wǎng)絡(luò)、用戶和服務(wù)發(fā)生了翻天覆地的變化：n應(yīng)用：視頻會(huì)議、實(shí)時(shí)消息、 IPTV、網(wǎng)真、遠(yuǎn)程醫(yī)療、點(diǎn)到點(diǎn)共享、視頻監(jiān)控、網(wǎng)絡(luò)上銀行、購物n用戶數(shù)： 1995年、 inter用戶數(shù) 1600萬、 2023用戶數(shù) 、如今n傳輸性能：共早期 155Mbit/s提升到如今的太比特級(jí)別（ Tbit/s）n處理器與內(nèi)存性能：摩爾定律、 CPU從幾十 MHZTHZ多核處理器、內(nèi)存容量從 MBGBn協(xié)議：從過去的眾諸侯相爭(zhēng)過度合并成了 IPV4/IPV6和 Ethern網(wǎng)絡(luò)：已經(jīng)或正在將傳統(tǒng)的特定業(yè)務(wù)向支持多種服務(wù)的融合性網(wǎng)絡(luò)進(jìn)行遷移169。2/ 54Version 運(yùn)營商級(jí) NOS需求n 融合性：應(yīng)具有可以利用現(xiàn)有的網(wǎng)絡(luò)結(jié)構(gòu)并將多種服務(wù)融合到一起的能力。Essentials—Module 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. CiscoIOS 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco started on standby card4. Process D: no checkpointing no process D39。CProcessProcess 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. All rights reserved. Cisco 2023, Cisco Systems, Inc. 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