The Complete IS-IS Routing Protocol- P19

The Complete IS-IS Routing Protocol- P19:IS-IS has always been my favourite Interior Gateway Protocol. Its elegant simplicity, itswell-structured data formats, its flexibility and easy extensibility are all appealing – IS-ISepitomizes link-state routing. Whether for this reason or others, IS-IS is the IGP of choicein some of the world’s largest networks. Thus, if one is at all interested in routing, it is wellworth the time and effort to learn IS-IS.
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The Complete IS-IS Routing Protocol- P19 Index 533 Weaknesses in ISIS 353 Recommendations 493–494BGP and 274–276, 481–482 Liveliness 135–136Cisco 6 LSDB 141–142, 433 see also Link-stateCommon header 110 databaseConfiguration LSPs see LSPs Basic 66–68 MAC addresses and 80 IOS 451 Messages JUNOS 452 Common header 110Configuration examples see Configuration Hello 109–110 examples LAN hello 111Database 142–143, 433 see also Link-state P2P hello 114 database Metrics 14, 193, 267, 294–295 301Defined 1 Auto-bandwidth 320DIS 113, 188 (see also DR) Auto-calculation of 319–320 And psuedonodes 183 And traffic engineering 393 Election 173, 199 Interworking issues 327 ID (JUNOS) 201–202 Example 250–253 Pre-emption 200 New-style 318 Priority 199–200 Old-style 301–302, 304–205, 327 Redundancy 202 Static 320–322Distribution of prefixes 329–331 Wide 304, 318, 408Encapsulation MTU size 82, 230–232 802.3 81 Checking 116 SNAP 231–232 Issues 230–232Extended fragmentation 518–520 Multi-topology 379Extensibility 5, 289–291 Neighbor liveliness detection 135–136Extensions 345 NETs 92–93, 100Flooding and TED 436 On NSFNet 3–4Full Internet routes 469 Origin of 2–4Future of 503 OSI-RM and 79–80G-MPLS extensions 513–518 Overload bit 154, 156–157, 159Graceful restart 388–389 Application 159–160IETF and 6 Fragments and 244Interface 80 Setting 161–163Intergration with IP 5 Use recommended 499IOS commands for see Commands, IOS Padding 116, 234–235IP addresses and 102–103 Private addresses 103–104IPv6 370 Pseudonode 153, 183, 186–187, 301JUNOS commands for see Commands, And SPF calculation 254–256 JUNOS Representation 188LDP and 421 Suppression of (P2P) 196Levels System-ID selection 191–193 8-level ISIS 513–518 PSNP 208, 218, 236–238 Defined 85 And authorization 365 L1 85–87, 112, 142, 144, 155, 240, 331 Purging LSPs 172–175 L1L2 85–87, 112, 115, 156, 159, 240, Expiration of 174 331, 339 Route leaking, ISIS 87–90 L2 85–87, 112, 143–144, 146, 155, 240, Level 1 to Level 2 337 331 Level 2 to Level 1 331–334534 IndexISIS (contd) Activating configuration 68–69 Route resolution 247, 273–276 Auto-completion 39 Routing policy 55, 73, 76–77, 310, 312, CLI 35, 56 336, 471–472, 477–478 see also Route Configuration examples see leaking Configuration examples, JUNOS Sample network Configuration mode 39 Addresses 8 Example 37 see also Commands, Topology 7 JUNOS Scaling 475 Help 38 LANs 183–186 ISIS and 59 Levels and 494–497 ISIS database see ISIS database Show commands see Commands ISIS implementation 37, 63–65 SNAP encapsulation 231–232 Logging 22 SPF calculations 94, 126, 144, 156, 208, Software 33 241, 247 M-series 31 Stress 479 T640 159 CPU and memory 483 JUNOS see Juniper Flooding 479 Forwarding state change 481 Kernel 23–26 SPF 480 Atomic-module 25 Synchronizing database see Link-state database, synchronization L1, L1L2, L2 see Levels TLVs see TLVs Label request object (LRO) 412 Troubleshooting 439, 460 see also Label stacking 404 Troubleshooting, commands Labels, MPLS 402 Broken adjacency 460 LAN-ID 106, 173, 200 Missing PP-OSICP 462 LANs Non-matching area-ID 465 Scaling ISIS for 183–186 Non-matching authentication 466 Synchronization on 208 Non-matching IP subnet 467 Layer 2 MPLS (cell-based MPLS) 402–404 Non-matching level 464 Layer 2 overlays 395–400ISO 10589 Layer 3 MPLS (Packet-based MPLS) Basics 1, 3, 79, 178–179, 181 404–408 Flooding 296 LDP 408, 417–418 Hellos and LSPs 220 And ISIS 427 IPv6-IPv4 376 And RSVP-TE 428–430 Jitter 185–186 Length check, on TLVs 296–297 MTU size 234 Levels, ISIS Oddities 102, 116, 131, 156, 218 Defined 85 New-style metrics 318 L1 8 ...