IS IS bj

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Statement(说明) 本文实际上是思科 BSCI(Building Scalable Cisco Internetworks)一书中第七单元 (Configuring IS-IS Protocol)的读书笔记,目前有关 IS-IS 的中文资料较少,故整理此笔记 以方便那些英文水平一般的网络技术工作者学习,因为本人也系 IS-IS 路由协议的初学者, 故文中可能存在一些由于理解偏差而导致的错误,恳请朋友们不吝赐教。 为了便于大家理解,本文在讲述 OSI 协议时将尽可能的将其与大家所熟知的 TCP/IP 协 议进行比照,在讲述 IS-IS 路由协议时则尽可能的将其与 OSPF 路由协议进行比照,这也是 Cisco System BSCI Student Guide 一书中所采用的方法。 本文可自由传播和使用,但请保留作者信息,请尊重我的劳动,谢谢! ...

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  1. IS-IS ·ÓÉÐ-ÒéÖÎĽ̳ v1.0 Chapter 0 Preface £¨µÚÁã ¥Ôª ÐòÑÔ£© Statement£¨ËµÃ÷£© ±¾ÎÄʵ¼Ê ÉÏ ÊÇ˼¿Æ BSCI£¨ Building Scalable Cisco Internetworks£ © Ò » ÊéÖÐ µÚÆßµ¥Ôª £¨ Configuring IS-IS Protocol£©µÄ¶ÁÊé± ¼Ç£¬Ä¿°ÓÐ¹Ø IS-IS µÄÖÐ ÎÄ×ÊÁϽÉÙ£¬¹ÕûÀí´Ë±¼Ç ÒÔ·½±ãÄÇЩӢÎˮƻ°µÍøÂç¼Êõ¹¤×÷Õßѧϣ¬òª¾È² IS-IS ·ÓÉÐ-ÒéµÄ³õѧÕߣ¬ ¹ÊÎÄÖпÉÜ´æÔÚÒ»©ÓÀí½âÆ«²î¶øµ¼Âó£¬ÇëÅÑÃÁßÍÌ¡ ΪÁ˱ãÓÚ´ó¼ÒÀí½â£¬ ±¾ ÎÄÔÚ½²Êö OSI Ð-Òéʱ½«¾¡¿ÉÄܵÆäÓë´ó¼ËùìÖª TCP/IP Ð- Òé½øбÈÕ£¬ÔÚ²Êö IS-IS ·ÓÉÐ-ÒéʱÔò¾¡¿Äܵ½«Æäë OSPF ·ÓÉÐ-Òé½ø±ÈÕ£¬â² ÊÇ Cisco System BSCI Student Guide Ò»ÊéÖÐËù²ÉÓõķ½¨¡£ ±¾ÎÄ¿É×ÔÓ´«²¥ºÍʹ㬵ÇëÁô÷ÕßÐÅÏ¢ðÖØÒÀ¶¯»¡ Outline£¨Ìá¸Ù£© 1¡¢ OSI Ð-ÒéºÍ IS-IS ·ÓÉÐ-Òé¼ò½ 2¡¢ IS-IS ·ÓÉÐ-Ò鹤×÷ÔÀí 3¡¢ ͨ¹ý¼¯³ÉµÄ IS-IS ·ÓÉÐ-ÒéʵÏÖ IP Óë OSI Ð-ÒéµÄ·ÓÉ 4¡¢ ¼¯³ÉµÄ IS-IS ·ÓÉÐ-ÒéÅäÖÃë¹Ê About author£¨¹ØÓÚ×÷Õߣ© Climber£¨µÇ·å£© from Changchun City£¬ Jilin Prov. Surf on the net for six years£¬ Wander regularly in the cisco forum of netease Discussion is welcome! e-mail:tiejun@163.net or climbmount@163.com Deeply appreciated my secretary for her help! ☺☺☺☺☺☺☺☺☺☺ ¡ª£±
  2. Chapter 1 Introduction to OSI Protocol £¨µÚÒ» ¥Ôª OSI Ð-Òé¼ò½£© ISO Óë OSI ISO£¨ International Organization for Standardization£© ¹ú¼Ê±ê×»¯éÖÒÂÁ¦ÓÚ¸÷ìòµÄ ¼Ê±ê×µÄÖƶ¨£¬ ´ó¼ÒËùÊìÖªµÄ OSI£¨ Open System Interconnection£© Æß²ãÍøÂç Ä£Ð;ÊÇ ISO Õë ¶Ô¶à³§ ÉÌÍø Âç²úÆ· »¥Áª ʱµÄ¼æ ÈÝÐÔ ÎÊÌâÖÆ ¶¨µÄ ÍøÂçͨ ѶÐ- Òé±ê×¼ £¬ÏÖ ½ñµÄ»¥ ÁªÍø »ù ÓÚ TCP/IP Ð-Òé¹½¨£¬ ¶ø TCP/IP Ð-ÒéºÍÆäËüµÄÓÃÚ¿ª·ÅʽøÂç»Ñù£¬ ¶¼ÊÇ»ùÓÚ OSI ÍøÂç Ä£Ð͹½¨µ¡ ISO ³ýÁ˹ ½¨ÁË OSI Æß²ãÍøÂçÄ£ÐÕâÒ»±ê×¼¬ »¹Í¬ ITU-T£¨¹ú¼ÊµçÐÅÁªÃ˱ê×飩 ¹ ÏëºÍʵÖÁËÒ»¸ö¬ÑùÃûΪ OSI µÄ¾ß ÌåµÄÍøÂçÐ-Òé¡£ ¿ÉϧÔÚÕâ ¸ö TCP/IP Ð- Òé»Í³ÌìϵÄʱ´ú£¬ OSI ÍøÂçÐ-Òé»ù±¾ÃÓ¦¡£ TCP/IP Ð- ÒéÏàËÆ£¬ ͬ OSI Ð-Òé²¢»ÊÇÔ×ӵģ¬ËüÿãÖ¶¼°ºíàÅÌب¹¦Ü Ð-Ò飬 OSI Ð- Òé²ÉÓÃÌåϵ»¯ £¨»ò²ã´Î¯ Hierarchical£© ±àÖ·£¬ ÎÒ ÃÇÄܹý NSAP Network Service £¨ Access Point£©À´Ñ°Ö· OSI ÍøÂçÖд¦ÓÚ«Êä²ãµÄ¸÷·þÎñ£¬ËüÀàÆ TCP/IP Ð-ÒéÖµÄ IP µØ Ö· +¶Ë¿ÚºÅ¡£ ÏÂÃæÎÒ ÇÀ´Á˽⠻ЩÊõÓ ES£¨ End system£©¶Ëϵͳ£¬Ã»ÓзÉÄÜÁ¦¨Æ¡°Êý¾Ýüת¢±¸Çøç½Úã IS£¨ Intermediate System£©Öмäϵͳ£¬ÓÊý¾Ý°üת·¢ÄÜÁ¦øÂç½Úã´ÉÆ÷¡ Area ÇøÓò£¬ÉÒ»×éÁеÄ·Æ÷¡¢ÖúºÍ½ËüÃç´³ÊÌå Domain Óò£¬ÉÒ»×éÏà¥Á½µÄ Area ×é³É¡£ £¨ ºÇ£¬ »¹ÊÇÓ¢ÎĽ²µÃº£¬ Area ºÍ Domain ·-³ÉÖÐÎÄÒ¶¼²»ªµÀÔõôÇøÁË£¬ ×¢Ò⣺ ºóÃæµÄ ÐðÊöÖ£¬ÎÒÓÃÇøò´ú±í Area£¬ÓÃò´ú±í Domain£© ÆäʵÕâÀïÃæ Domain Ï൱ÓÚ´«Í³Ä×ÔÖÎÁË£¬ Area Óë OSPF µÄ Area ÏàËÆ £¨×¢ÒâÊÇÏàËÆ© £¬ ES ¾ÍÊÇÖ÷»ú £¬´ó¼ÒÖªµÀ·ÓÉ»°ãÃ÷úʲÕâïÇÑùÄ ES Óë IS Ö®¼ä¹Ø ϵºÜ¼ò µ¥¡£ ¡ª£²
  3. ²»ÓÃÎÒ˵ÄãÖªÀÕâ¸ö illustrate ÊDz ôÁË°É£¿Ê²Ì«¸ÔÓ»¹Øϵ¬ Æäʵ½ÓÏÂÀ´ÎÒÃÇÖ» »á½²µÍøÂçãÀïÃæÄÒ¶«Î÷£¬ ONLY the portion around with red block£¬ ̤ʵÁË°É£¡ »¹ÊǼ¸ ö õÓ CLNS Connectionless Network Service ÎÞÁ¬½ÓÍøÂç·þñ CLNP Connectionless Network Protocol ÎÞÁ¬½ÓÍøÂçÐ-Òé CMNS Connection-Mode Network Service Á¬½ÓÄ£ÊÍøÂç·þÎñ CONP Connection-Oriented Network Protocol ÃæÏòÁ¬½ÓÍøÂçÐ-Òé Ïë TCP/IP Ð-Ò飬ӵ㶮Á˰ɿǽ¸öÏà±Ú TCP£¬ºóÁ½¸öÏ൱ÓÚ UDP£¬ OSI ¾ÍÊǨ¹ý CLNP ʵÏÖ CLNS£¬Í¨¹ý CONP ʵÏÖ CMNS£¬ºÇ£ÓеãÈÆ×ì¡ ÔÙ¿´Í¼£¬ ÓÖеãÔΣ¬ »-´íÁË£¿ÃÓЬ OSI ¾ÍÊÇÔÚøÂç²ãµÏÖÄÕâÁ½·þÎñ£¬ ÕâÑùÀ´Ëµ£¬ CLNP Ï൱ÓÚ IP ÁË£¬ CONP ¾ÍÏ൱ÓÚ¿ÉÄ IP °É£¬ºÇ¡ Èç¹ûÄã²»ÖªµÀÊôÇæÏòÁ¬½Ó£ÎÞ×îºÍÂ¥¿ TCP/IP µÄ֪ʶ¡£ ºÃÁË£¬ÏÖÔÚ ÄãÓÖ¿ÉÒÔÍü µôһЩ¶«Î÷ ÁË£¬ÎÒÃÇÏ ÃæÒª½²µÄ¶« Î÷Ö»ºÍ CLNP Óйأ¬Ã»´íÖ CLNP ÔÚ½»Êý¾Ý±ÒÀµ routing protocols ¹½¨µÄ· ÓÉ±í£¬ CONP ÒÀ¿ X.25 Ð-ÒéµÄּ̹¦Ü ʵÏÖÁ´Â·Ä½¨¢¡±£³ÓëÕ¹ OK£¬ ÐÝÏ¢Ò» »á¶ù£¬ ÎüÑ̵Äȥ쨣¬ ºÈË®µÄ½ØÏÂÊÒ£¬ È¥ John ¼ÒµÄ ´ò¿ª°»§ÌøÏÂÈ¥¾ÍÉÒÔÁË£¡ ¡ª£³
  4. Chapter 2 Basic IS-IS Routing Protocol £¨µÚ¶þ ¥Ôª »ù±¾µÄ IS-IS ·ÓÉÐ-Ò飩 IS-IS ·ÓÉÐ-ÒéÖµÄ ÅÏ¢·ÎªË¼¶£º 1¡¢ Level-0 ÚÔæ´ ÚÓ ES Óë IS Ö®¼ä£¬ ׼ȷµÄ½²»ËãÂÓÉÐ-Ò飬 ÎÒÃÇ¿ÉÔ³ÆËüª Discovery Protocol ·¢ÏÖÐ-Ò飬ÀàËÆÓÚ TCP/IP ÍøÂçÖÐµÄ ARP µØÖ·½âÊÍÐ-Òé¡£ 2¡¢ Level-1 ´æ ÔÚÓͬһÇøòĵ¶ą̀·ÉÆ÷Ö®¼ä£ ÓÃÚʵÏÖÇøòÄ·ɣ¬ ÀàËÆÓÚ OSPF µÄÓò ÄÚ·ÓÉ£¨ O£© ¡£ 3¡¢ Level-2 ´æ ÔÚÓͬһòĵ¶ą̀·ÉÆ÷Ö®¼ä£ ÓÃÚʵÏÖòÄ·ɣ¬ ÀàËÆÓÚ OSPF µÄÓò¼ä· ÓÉ£¨ O IA£© ¡£ 4¡¢ Level-3 ´æÔÚÓ²»Í¬µÄòÖ®¼ä£ÀàËÆ TCP/IP ÍøÂçÖÐÓÉ BGP ʵÏÖÄ AS ¼ä·ÓÉ¡£ ºóÃæµÄ²¿·ÖÎÒÇ»áØã½éÉÜ Level-1 ºÍ Level-2¡£ OSI ÍøÂçÖпÉÒÔ²ÓõÄÈý·Ð-Ò飺 1¡¢ IS-IS£¬±¾ ÎĵºËÐÚÈÝ£¬ü³ýÁª OSI Ð-Òé ¹½¨Â·ÓɱíÍ⣬»¿ÒÔΪ TCP/IP Ð- Òé¹½¨ ·ÓÉ±í£¬µÈ»Ò²¿Ô¹¤×÷Ú Dual Mode£¬ÍʱΪÁ½ÖøÂçÐ-ÒéÌṩ·þñ¡£ 2¡¢ ISO-IGRP£¬ ÊÇ˼¿ÆΪ CLNS£¨¼´ OSI Ð-Ò飬 ÒÔϽÊÇ£¬ ÒòΪ OSI Ð-ÒéÖµÄ CLNS Ӧà · Óɱíת·¢Êý¾Ý¡£ £©Éè¼ÆµÄ·ÓÐ-Òé¡ 3¡¢ Static CLNS routes£¬ OSI µÄ¾²Ì¬Â·ÓÉ£ TCP/IP µÄ Static route ¾-³£Ð´°É¿ ºÜÉÙÓã¿ÄÇ㦠¸ÃÒѾ-»òÊǼ´½«Í¨¹ý LAB ÁË°É¡£ ÏÂÃæÎÒ ÇÀ´±È½ » ¼¯³ÉµÄ IS-IS Óë OSPF IS-IS Óë OSPF ¶¼ÊÇÁ´Â·×̬ÐÍÓÉÑ¡Ôñ-Òé£ ¾ù²É Óà SPF Ëã·¨ À´¹½¨Â·ÓÉ±í£¬ µ«ÊÇ¾Í TCP/IP ·ÓɶøÑÔ£¬Ú´óµÄÍ绾³ÖÐ IS-IS µÄÐÔÜÓÅÚ OSPF£¬ÕâÒ² ÕýÊÇ´ó¶àµÄ ISP ¶¼²É Óà IS-IS ¶ø²»ÊÇ OSPF ×÷Ϊ¹Ç¸É·ÓÐ-ÒéµÄÔò£¬Ëù¿ìѧ°¡ OSPF ·ÓÉÐ- ÒéÇøÓòµÄ·Ö½çãÔÚÂÉÆ÷®Ï£¬ ABR ͬʱôÓÚ ¶à¸öÇøÓò£¬ IS-IS ·ÓÉÐ- ÒéµÄÇø Óò·Ö½çµãÔÚÁ´Â®ÉÏ£¬Ã¿¸öÆ÷¹Ì¶¨ÊôijһÇø¡ OSPF ·ÓÉÐ- ÒéÔÚ¶àÇøÓòµÄ»·¾³ÏªРBackbone£¨¹Ç¸É£© ÇøÓò£¬ ÇÒªóËùÓз¹¸Éøòë ¸ÉÇøÓòÖ±½ÏàÁ¬£¨·ñÔҪ͹ý Virtual-Link ´ò²¹¶¡£© £¬ IS-IS ÔÚÉè¼ÆÏûÓÐÕâÒªÇó¡£ OSPF ·ÓÉÐ- ÒéÖÐ LSA£¨ Á´Â·×̬ͨ¸æ£©Êý¾Ý°ü½Ï¶à IS-IS ·ÓÉÐ-ÒéÖÿ¸öÆ÷ÔÚÇøò ÄÚÖ»·¢ËÍÒ¸ö LSA Êý¾Ý°ü¡£ OSPF ÓÐÒ»© IS-IS Ëù²»¾ß±¸µÄÌØÐÔ£ºê¼Ç·Óɬ©½Úøò¡¢Í Demand Circuit µÈ¡£ OSI Address£¨ OSI ±àÖ·£© ¡ª£´
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  10. Chapter 3 IP and OSI Routing with Integrated IS-IS £¨µÚÈý ¥Ôª ͨ¹ý¼¯³ÉµÄ IS-IS ʵÏÖ IP ºÍ OSI ·ÓÉ£© ¼¯³ÉµÄ IS-IS ·ÓÉÐ-Òé¿ÔʵÏÖÈýνģº µ¥´¿Ä OSI Ð-Òé·ÓÉ£¬µ¥´¿Ä IP ·ÓÉ»òÁ½ÕßµÄáºÏ¡£ ¼¯³ÉµÄ IS-IS ·ÓÉÐ-ÒéÖ§³ÔÏÌØ£º VLSM£¬ÕâÒζ×ÅËüµÄ·ÓɸÐÏ¢Ö°ºÍøÑÚ룿ò»Á÷ç¾³¡ Redistribution£¬Óë¸÷Ö IP ·ÓÉÐ-Òé¼ä½øÖز¡£ Summarization£¬»ã×Ü¡£ NET µØÖ·ÓÃÚÐγÉÅþÁ¹Ï£¬Ô½ø SPF ¼ÆËãʱê¶Â·ÓÉ÷¡£ OSI ·ÓɱíµÄ½¨Á¢ÒÀ SPF Ëã·¨£¬üΪ L1 ·ÓÉºÍ L2 ·Óɵ¥¶À½¨Á¢×ª±í¡£ PRC£¨ Partial route calculation ¾Ö²¿Â·ÓɼÆË㣩ÃÚµ½´ï ES µÄ¿É´ïÐÔ¡£ ´¿ IP »·¾³Ï嵀 IS-IS ¼¯³É·ÓÐ-ÒéÖû ES ´æÔÚ¡£ OSI Area Routing£¨ OSI ÇøÓò·ɣ© Level 1 ·ÓÉ »ùÓÚ System ID ÔÚÇøÓòĽУ¬ Èç¹ûÄ¿µØλÓڷDZ¾øò£¬ ÔòÑ°Õҿɵ½´ï»î¾ µÄ Level 1-2 ·ÓÉÆ÷µÄ×î¶Ì¾¡£ £¨Ï൱ÓÚÖ¸òÇø³ö¿ÄÈʡ·ɩ Level 2 ·ÓÉ »ùÓÚ Area Address ½øУ¬ °´Õ Area cost ѡ·£¬Èç¹û Ä¿µØλÓÚ±¾Çøò£¬É¸ù ¾Ý System ID Ñ¡Ôñ×îµÍ¿ªÏú·¾¶£ ±Ë´Ï໥Á¬½ÓµÄ¾ßÐ Level 2 ·ÓÉÄÜÁ¦ µÄ·ÓÉÆ÷ÐγÍøç¹Ç¸£¬ ¾ßÓÐË«ÖØÉí·ÝµÄ Level 1-2 · ÓÉÆ÷ÔÚ Level 1 ºÍ Level 2 ·ÓÉÖ®¼äÆðÏν×÷ᣠÒòΪ Level 1 ·ÓÉÔÚÑ¡ñµ½´ïDZ¾ØøòÍçÄÊ£¬ ֻѰÕÒ×î½üµÄ Level 1-2 ·ÓÉÆ÷ £¬ ÔÚ Ò»¸ö¾ßÓж೿ڵÄÇøòÖÉÜáѡȴμ·£ IS-IS ²»¸ºÔð µÚÈý¼¶Â·ÓÉ£¬ ÔÚ´¿ IP ÍøÂçÖпÉÓ BGP ʵÏÖ£¬ ÔÚ´¿ CLNS ÍøÂçÖпÉÓ ISO-IGRP »ò¾²Ì¬ CLNS ·ÓÉʵÏÖ¡£ ¡ª£±°
  11. IS-IS ·ÓÉÐÅÏ¢µÄ¼¸ÌõÃüÁ show isis topology ·Ö¼¶ÏÔ Ê¾µ½´ïÿ¸ö NET£¨ÓÃÄ¿µ ·ÓÉÆ÷µÄÖ »úÃû×Ö´úÌ棬ÓÉ Dynamic Hostname Mapping Ð-Òé»ñµÃ£©Ä ËùÓР·¾¶ºÍ¿ªÏú¡£ show clns route ÏÔʾ CLNS Ð-Òé·ÓÉ±í£¬ °üº¬µ½ÒÑÖª NET µÄ·ÓÉÐÅÏ¢¡£ L1 ·ÓÉÆ÷Öл°üº¬ ±¾µØÇøÓòÄÚ NET ÌõÄ¿¡£ show isis route · Ö ¼ ¶ Ï Ô Ê ¾ µ ½ ´ ï à ¿ ¸ö NET£ ¨ Ó Ã Ä¿µÄ·ÓÉ Æ÷ µÄÖ÷»úÃû ×Ö ´úÌ棬ÓÉ Dynamic Hostname Mapping Ð-Òé»ñ µÃ£© µÄ ×î¼Ñ ·¾¶ºÍ¿ªÏú¡£ ¶ÔÓÚ L1 · ÓÉÆ÷£¬ µ½´ï L1-L2 ·ÓÉÆ÷ µÄ×î ½ü·ÓÉ×÷Ϊ¸Ã L1 ·ÓÉÆ÷ת¢Êý¾Ý°üµ½Ç±ØøòÄÈ¡£ which-route NSAP ÓÃÚÕÒÑ°µ½´ïÖ¸¶¨ NSAP µÄ·ÓÉÌõ¿¡£ IP ·ÓɵļÆËã Ç°ÃæÎÒÌáµ½¹ý£¬ PRC£¨ Partial route calculation ¾Ö ²¿Â·ÓɼÆË㣩 ÓÃÚ¼ÆËãµ½´ï ES µÄ¿É´ïÐÔ¡£ ÔÚ IP ÍøÂçÖУ¬ ËüÒ²ÓÃÀ´½øÐ IP ÍøÂçµÄ¿É´ïÐÔ¼ÆËã¡£ ¼ÆËãµÄ½á¹û·ÅÈë IP ·ÓÉ±í¡£ £¨µ±È»¬ IS-IS ·ÓÉÐ-ÒéѧµÃÄ×îÖÕ²»¶¨áÅÈë IP ·ÓÉ±í£¬ Èç¹û»ÓÐÆäËü IP ·ÓÉÐ-Òé²Ñ§µ½´ïÏà ͬøÂçµÄ·ÓɣǾҪ±È½ÏÁÖÐ-é¹ÜÀíàëË¡ £© ÓÉ IS-IS ·ÓÉ Ð-ÒéѧµÃÄ·ÓÉÔÚ±íÖ ¡° i¡± ±íʾ£¬ £¨Ã»ÓÐ ÍüÁË ¡° I¡± ±íʾ²Ã´°É£¿© Ò»¼¶ ºÍ¶þ¼Â·ÓÉÔòÖ±ðá° L1¡±ºÍ¡° L2¡±íʾ¡£ ºÃ°É£¬ÔÙÐÝÏ¢Ò»á¶ùÈóÎÇÀ´Ñ§ IS-IS ·ÓÉÐ-ÒéµÄÅäÖᣠÏÂÃæµÄͼÐÎÊÇ Cisco ¹«Ë¾ µÄ¹ÉƱ½üÈýêÀ´ÔÚ NASDAQ µÄ×ßÊÆ £¬ ¿´ÄǸö×îߵ㣬 Cisco ±Æɹ ĵ ÊÐÖµ³¬¹ýÁË Microsoft£¬¿ÉϧºÃ¾°²»³¤£ê¼¨ÒÖ¡ ¡ª£±
  12. Chapter 4 Integrated IS-IS Routing Protocol Configuration £¨µÚËÄ ¥Ôª ¼¯³ÉµÄ IS-IS ·ÓÉÐ-ÒéÅäÖã© ×ÜÌå²½Ö裺 »®¶¨ÇøÓò£¬ÖÆ NETs ±àÖ·¼Æ»®£¬²¢¾ö¶¨ÐèÒªÔË IS-IS ·ÓÉÐ-ÒéµÄ½¿Ú¡£ Æô¶¯ IS-IS ·Óɽø³Ì¡£ ÅäÖà NET¡£ ÔÚ½Ó¿ÏÂÆôö¼¯³ÉµÄ IS-IS µÄÖ§³¡£ ×¢Ò⣺ÄÇЩûÓëÈÎÆäËü·É÷ÏàÁ¬½µ¿Ú¨ç loopback£©Ò²»ÀýÍâ¡£ ¼¸Ìõ»ù±¾ÅäÖà üÁ 1. Router(config)# router isis [tag] Æô¶¯ IS-IS ·Óɽø³Ì£¬ tag ÓÃÚÇø±ð¶à¸ö IS-IS ½ø³Ì¡£ 2. Router(config-router)# net network-entity-title Ϊ·Óɽø³ÌÅäÖà NET µØÖ·¡£ ×¢Ò⣺ òΪ Õâ¸öµØÖ·Óà ÓÚÅþÁ ¹Øϵ µÄÐγɺÍ· ÓɼÆËãʱµÄ ·ÓÉÆ÷ʶ±ð £¬ËùÒÔ¼´Ê¹ ÔÚ´¿ IP ·ÓɵÄÍøçÖÐÒÀÈ»ª½Åäᣠ3. Router(config-if)# ip router isis ÔÚÏàÓ¦½¿ÂÆôà IS-IS ¶Ô IP ·ÓɵÄÖ§³¡£ 4. Router(config-if)# clns router isis ÔÚÏàÓ¦½¿ÂÆôà IS-IS ¶Ô CLNS ·ÓɵÄÖ§³¡£ 5. Router(config-router)# is-type {level-1 | level-1-2 | level-2-only} È«¾ÖģʽÏÂÅä÷ÓÉÆ÷µÇ¬±¡Îª L1/L2£¨ Station/Area£© ¡£ 6. Router(config-if)# is-circuit-type {level-1 | level-1-2 | level-2-only} ½Ó¿ÚÄ£ÊÏÂÅäÖÃþÁ¹ØµÀàÐͬȱ¡Îª L1/L2¡£ 7. Router(config-if)# isis metric default-metric {level-1 | level-2} ΪÁ½¼¶Â·ÓÉÖ±ð¸¨ÈÊ¡¿µ£¬ 10¡£ ¼¸Ìõ¿ÉÑ¡ÅäÖà üÁ £¨ÊéÖÐÃ»Ó ½² ¬ÎÒ´ IOS 12.0 Manual Éϲ鵽ģ© 1¡¢ Router(config-if)# isis hello-interval seconds {level-1 | level-2} ÔÚ½Ó¿ÏÂÐ޸ķ¢ËÍ Hello °üµÄʱ¼ä¸ô£¬È¡Îª 10s¡£ 2¡¢ Router(config-if)# isis hello-multiplier multiplier {level-1 | level-2} ÐÞ¸Ä Dead Interval Óë Hello Interval µÄÏà±È¶Êý£¬¡Îª 3¡£ 3¡¢ Router(config-if)# isis priority value {level-1 | level-2} È¡Öµ·¶Î§ 0-127,ȱʡΪ 64,Ϊ 0 Ôò²»ÎÓë DIS µÄÑ¡¾Ù£ 4¡¢ Router(config-if)# isis password password {level-1 | level-2} ÉèÖý¨Á¢ÅþÚ¹ØϵʱÐÑé¤ÄÜÂë¡£ 5¡¢ Router(config-router)# summary-address address mask {level-1 | level-1-2 | level-2} ·ÓÉģʽϵ»ã×ÜÃüÁî¡ ¡ª£±²
  13. IS-IS ·ÓÉÐ-ÒéÅäÖÃʵÀý£º router isis net 01.0001.0000.0000.0002.00 interface ethernet 0 ip address 10.1.1.1 255.255.255.0 ip router isis isis circuit-type level-2 isis metric 20 level-2 interface serial 0 ip address 10.1.2.1 255.255.255.0 ip router isis isis circuit-type level-1 ÊDz»¼òµ¥ÁË㣿ÕâÖÒ¸ö ×î»ù±¾ µÄÅäÖᣠÏÂÃæ½éÉÜÒ»× IS-IS ·ÓÉÐ-ÒéµÄ¼ìÑÃüÁ 1¡¢ show clns ÏÔʾ¹ØÓÚ CLNS µÄ×ÜÌåÐÅÏ¢£¬½ÉÙʹÓá 2¡¢ show clns protocol [tag] ÀàËÆÓÚ show ip protocol£¬ÏÔʾÐ-Òé×ÜÌåÅ¢£Ë¸ÃµÄ½Ó¿Ú¼°ÖØ·²Çö¡ 3¡¢ show clns interface [type number] ÏÔʾָ¶¨½Ó¿ÚµÄÅþÁ¹Ø¢Çéö£¬ µç·Óɼ¶±ðÀàÐÍ£¬ ¶ÈÁ¿Öµ£¬ DIS Ð-É̵ÄÓÅÏȼ¶ ÒÔ¼°Æʱ÷µÈÐÅÏ¢¡£ 4¡¢ show clns neighbors [type number] [detail] ÏÔʾÅþÁڹص±í¡£ 5¡¢ show isis topology/route£¨Ð /¾É£© ÏÔʾ IS-IS ·ÓÉÐ-ÒéµÄ»¼¶±í 6¡¢ show clns route ÀàËÆÓÚ show ip route ÏÔʾ CLNS ·ÓÉÐ-ÒéµÄ±í¡£ 7¡¢ show isis database ÏÔʾÍØÆ˽á¹ýÝ¿âµÄÚÈ¡£ 8¡¢ show ip protocol ÓëËùÐÆäü IP ·ÓÉÐ-Òé»Ñù£¬ÏÔʾÕûÌåµÍ³Ë¸ÃĽ¿ÚÖز¼Å¢ ¼°Â·ÓÉÐÅÏ¢Ô´¡£ 9¡¢ show ip route [address [mask] ] | [protocol [process-id | as-number] ] Õâ¸öÃüÁî²»Ó½ÊÍË°É£¿ Integrated IS-IS in WAN network£¨¹ãÓòÍøÖеļ¯³É IS-IS ·ÓÉÐ-Ò飩 ÎÒÃǶ¼ÖªµÀ£¬ WAN Á´Â·ÖΪÈýÀàÐÍ£º Leased Line£¬ Circuit Switched ºÍ Packet Switched¡£ ÔÚרÓÃÏß·ºÍ°ÎÅÁ´ÉÜÙʹ IS-IS ·ÓÉÐ- Ò飬 ËùÒÔÏÂÃæÎÇÖ÷ªÑ§°Úü½»ÍøçÐ IS-IS µÄһЩÌØã¡£ ¡ª£±³
  14. ÔÚ°ü½»ÍøÂçÖУ¬×îºÃ²ÒªÊ¹Óµã¶àÄÎïÀí¿¨Á¢òÕâÑù NBMA ÍøÂç »·¾³ÖУ¬ ·ÓÉÐ-ÒéªÇóËù½ÚµãÖ®¼äÈ«»¥Á¬¡£ ÎÒÃÇÓ¦¸Ê¹µã¶Ô×½¿ÚÄ·À´¨Á¢ Á´Â·¡£ ×¢Ò⣺ µ±Äã²ÉÓà IS-IS · ÓÉÐ-Òéʱ£¬ ²»±Øµ£ÐÄÓÉÚʹÃã¶Ô×½¿øÒýÆðÀË·ÑÖÕ¼ä µÄÎÊÌâ¡£Òòª IS-IS ·ÓÉÐ-ÒéÔÊíÎÃÇÚµã¶×½¿Ï¹ ip unnumbered ÃüÁî¡£ ÔÚ NBMA µÄ»·¾³ÖÐÅäà IS-IS ºÍÇ°Ãæ »ù±¾ÒÑ£¬ ³ýÁË NBMA ÍøÂçÐ-ÒéËùèµÄ»±¾ÅäÖà £¨Èç µç·ºÅ¡¢ ¶þ²ãµØÖ·ÐÅÏ¢¼°Ó³ÉäÈ£© Í⣬ »òÐíÎÒÃÇÓ¦¸µ÷½Ú¼Æʱԡ¹óÄ WAN Á´Â·×Ê Ô´¡£ ÔÚµã¶Á´Â·ÉÏ£¬ Hello Ïû¢°üÖ»ÓÐÒÀàÍ£¬²·¼¶±ðÕâ¸öÎÃÇÔÚæ̹ýÁËÈçÄã ÍüÁË£¬¾ù»Ø·-°É¡ ºÃÁË£¬¿´ ½¸öÀý×Ó°É Ï ¹ß£¬Ò»Ìáµ½ NBMA ÎÒÃǾÍÄ FR Ϊ´ú±í¡£ interface Serial0/0 encapsulation frame-relay ! interface Serial0/0.1 point-to-point ip address 10.1.1.1 255.255.255.252 ip router isis frame-relay interface-dlci 100 ! interface Serial0/0.2 point-to-point ip address 10.1.1.5 255.255.255.252 ip router isis frame-relay interface-dlci 200 ! interface Serial0/0.3 point-to-point ip address 10.1.1.9 255.255.255.252 ip router isis frame-relay interface-dlci 300 ÉÏÃæµÄÀý×ÓÊÇ FR µã¶Ô×Ó½¿Ú£¬Ã»Ê²´ºËÄ¡ interface Serial0/0 encapsulation frame-relay ! interface Serial0/0.2 multipoint ip address 10.0.0.4 255.0.0.0 ip router isis frame-relay map clns 100 broadcast //ÔÚÄãѧϰ OSI Ð-Òé֮ǰ» map ¹ý IP °É£¿ frame-relay map clns 200 broadcast ¡ª£±´
  15. frame-relay map clns 300 broadcast frame-relay interface-dlci 100 frame-relay interface-dlci 200 frame-relay interface-dlci 300 ! router isis net 00.0001.0000.0000.0004.00 ÉÏÃæµÄÀý×ÓÊÇ FR µã¶Ôà×Ó½¿Ú£¬ ÐèÒªÌáÑÄãµÊÇÕâÖÅä÷½¨ÔÚÁ¢þ¹Øϱ¿Éܳö ÏÖÎÊÌ⣬ÂíÉÄã¾Í»á¿´µ½¡ IS-IS ÍøÂç¹ÊÕϼì²â»ù±¾½Ö裺 1¡¢ ¼ìÑéÅþÁÚ¹Øϵ Ê×Ïȼì²é½Ó¿Ú´Ì¬Ç·ñ UP£¬ Óà show cdp neighbor detail ¼ì²éÁ´ ·ÊÇñ¿ÉÒÔͨѶ£¬ Óà show clns neighbor ºÍ debug isis adj-packet ¼ìÑéÅþÁÚ¹Øϵ½¨¢ÄÇ¿ö¡£ ÔÚʹÓà show clns neighbor ÃüÁîʱ£¬ Ó¦¸Ã×¢ÒâÐ-éÀàÍ £¨ IS-IS not ES-IS£© £¬ ÅþÁÚ¹Øϵ״̬ £¨ UP not Init£© 2¡¢ ¼ìÑé LSPs ÄÚÈÝÊÇ·ñÕý ¿ÉÒÔʹÓà show isis database detail ÃüÁî ¼ì²éÁ´Â·×̬Êý¾Ý¿â£ ×¢ÒâÁ´Â·ÌõÄ¿µÊýºÍ¶È ÖµÊÇ·ñÕýÈ¡£ 3¡¢ ¼ìÑé LSPs ÊÇ·ñ±»ÕýÈ Flooding£¬Á´Â·×ÌÓÐñﵽͲ¡£ ¿ÉÒÔʹÓÃüÁî show clns traffic¡¢ debug isis local-updates »ò debug isis update-packet ÃüÁî £¨ºó Á½¸öÊǵäÐÍÄÑéÒÃü¼ì´Â·×̬Ïû¢Ë¿¡ 4¡¢ SPF ¼ÆËã½á¹ûÊÇ·ñ´æÔÚÎÌâ¡£ ʹÓà show isis topology¡¢ show isis route »ò show ip route£¨ Old command£©À´¼ìÑé¡£ 5¡¢ ¼àÊÓÐÔÄÜ¡£ µ±È»ÊÇ show process cpu ½Ó¿ÚÀàÐͲ»Æ¥Åäµ¼ÖÂ Ä þÁÚ¹ØÏ ½¨ ¢Ê§Ð R2 Óë R4 Ö® ¼äͨ¹ý NBMA ÍøÂçÁ¬½Ó£ R4 Ò»¶Ë²É Óõã¶ÔàÅäÖ£¬ R2 Ò» ¶Ë²ÉÓõãÔ ÅäÖ㬠ͨ¹ý show clns neighbors ÃüÁîµÄ Êä³öÎÒÃÇ¿ÉÔÖªµÀ£¬ ËüÃÇÖ®¼äµÄÅþÁÚ¹ØϽ¨¢²»Õý³£¬ µ«ÕâÊÇΪ²Ã´ÄØ£¿ R2#show clns neighbors System Id Interface SNPA State Holdtime Type Protocol 0000.0000.0004 Se0/0.2 DLCI 300 Up 8 L1 IS-IS R5 Et0/0 0050.3ef1.5960 Up 8 L2 IS-IS R1 Se0/0.1 DLCI 100 Up 23 L1 IS-IS R4#show clns neighbors System Id Interface SNPA State Holdtime Type Protocol R6 Et0/0 0010.117e.74a8 Up 26 L2 IS-IS ¡ª£±µ
  16. R3 Se0/0.3 DLCI 400 Up 28 L2 IS-IS 0000.0000.0002 Se0/0.2 DLCI 300 Init 29 L1 IS-IS 0000.0000.0001 Se0/0.1 DLCI 200 Up 290 IS ES-IS Ôì³ÉÕâÖÇé¿öµÄ-ÒòÊ£ºÁ½±ß·ÓÆ÷Ëù¢ Hello packet ÀàÐͲ»Ò Ö£¬ P2MP Ò» ±ß·¢ËÍ LAN IIHs£¬ P2P Ò»¶Ë·¢³ö P2P IIHs¡£ÐγÉÅþÁÚ¹ØϵÄýÌÒ²»Ñù¬ P2MP Ò»±ßÐèªÍ¨¹ýÈ ´ÎÕÊֵķ½¨Á¢ÅþÚ£¬ P2P ÔòÖ±½Ó붷ÐγÉÅþÁÚ¹Øϵ¡£ ºÃÁË£¬±¾¿Î³Ìµ½´áÊøÏÂͼÇƯÐÒ¸óÄÈâýë°·Öò¡ ¡ª£±¶
  17. Afterwords £¨ºó¼Ç © ÎÒ½Ó´¥Ë¼¿ÆÍøÂçÊõµÄ±ä²¢»³¤£¬ µ«×ܸоõÓÒ»¹ÉÁ¦¿Íƶ¯ÅαØëìËÙÇ°½ø£¬ ´ÓÀ ûÓÐÄÒ¸ö³§ÉÌΪ׼±Èç´Ë¶àµ¿·ÅÔÁÊ鮺ÍÏ£¬ Èç¹û˵½ÌÓý¾ö¶¨Î´À£¬ ÄÇôÎÒ ÓÐÀíÉÏàÅ˼¿Æ¹«¾ÒÈ»ÔìÙ·¢Õ£¬²ÄÜÚ¶µ½´Í¡ ¸Ð»¶Å¼Ò±õÏÈÉúÔÚÖ¹´óÁ¦ÍÆãË¿øÂçʽÌÓý£¬ ¸Ð»Ë¼¿ÆÕâöÊÀ½çÉÏ×î¾ßÄýÛÁ¦µ ÍŶӣ¬ÒòΪËü´ø¸µÄѲ»ÖÊǼõ¯¡ ÓÐÈ˵¼¿ÆĶ«Î÷̹óÁ£¬ ÎÒ¾õµÃÊǼþºÂ£¬ ¹óµÃÀëÆ×Ķ«Î÷ÒªÏÂô³öÈ¥£¬ ¾ÍµÃÕæÄÓÐ ¹ýÈËÖ®´¦²ÅУ¬ ÓÐѹÁ¦£¬ ²úÆ·ºÍ¼ÊõÅÄܸü¿ìµ¢Õ¹£¬ ·¢âõÄʱºòãÔõ´»ÓÐ϶ࣿë Ö»ÊÇÈçºÎÔÚ±£×¡ÏõÄù´ÉÕÅÀ½¸üßÓ¥¬ ¶ø²»ÊÇÒªóÉÏ˾°ÑÄãµÐ½® ÏÂÀ´ÒÔÇó̤ʵ£¬Ë¼¿Æ²»Ñù¡ ÓÐÈ˵¼¿ÆÄÖ¤Êé±áÁ£¬ ÎÒ¾õµÃ²ÊǼþºÂ£¬ ¿ÉÒÔ¾»¯ÏÂÕâ¸öȦ×Ó£¬ ÄÇЩָÍûÓÉÒ» ÕÅֽƬÀ´¸Ä±äÃüÔ˵Ͷ»ú¼ÏëØÈáÑ¡ñ¿ª£øæýÎÊòÁô ÕæÏ£ÍûÒÔºó¿É¾-³µÄд»©âÑù¶ÁÊ鱼ǬÀí×Ë·²°ïÖúðÈ ºÃÔÚ´óһʱѧáµÄÎå×ÖÐÍäÈë·¨Óô£¬Ï¹àË®¶«÷¾Ü½ã¡ Climber in Changchun Oct. 2002 ¡ª£±·

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