Users Guide

35 Open Shortest Path First (OSPFv2 and OSPFv3).................................................................................... 574
Protocol Overview......................................................................................................................................................... 574
Autonomous System (AS) Areas............................................................................................................................574
Area Types................................................................................................................................................................ 575
Networks and Neighbors........................................................................................................................................ 576
Router Types.............................................................................................................................................................576
Designated and Backup Designated Routers....................................................................................................... 578
Link-State Advertisements (LSAs)........................................................................................................................ 578
Router Priority and Cost......................................................................................................................................... 579
OSPF with Dell Networking OS...................................................................................................................................580
Graceful Restart....................................................................................................................................................... 581
Fast Convergence (OSPFv2, IPv4 Only)..............................................................................................................582
Multi-Process OSPFv2 with VRF..........................................................................................................................582
RFC-2328 Compliant OSPF Flooding................................................................................................................... 582
OSPF ACK Packing................................................................................................................................................. 583
Setting OSPF Adjacency with Cisco Routers...................................................................................................... 583
Conguration Information.............................................................................................................................................584
Conguration Task List for OSPFv2 (OSPF for IPv4)........................................................................................ 584
Sample Congurations for OSPFv2.............................................................................................................................597
Basic OSPFv2 Router Topology............................................................................................................................. 597
OSPF Area 0 — Te 1/1 and 1/2..............................................................................................................................597
OSPF Area 0 — Te 3/1 and 3/2............................................................................................................................598
OSPF Area 0 — Te 2/1 and 2/2............................................................................................................................598
Conguration Task List for OSPFv3 (OSPF for IPv6).............................................................................................. 598
Enabling IPv6 Unicast Routing...............................................................................................................................599
Applying cost for OSPFv3......................................................................................................................................599
Assigning IPv6 Addresses on an Interface........................................................................................................... 599
Assigning Area ID on an Interface..........................................................................................................................600
Assigning OSPFv3 Process ID and Router ID Globally........................................................................................600
Assigning OSPFv3 Process ID and Router ID to a VRF.......................................................................................601
Conguring Stub Areas............................................................................................................................................601
Conguring Passive-Interface................................................................................................................................ 601
Redistributing Routes..............................................................................................................................................602
Conguring a Default Route...................................................................................................................................602
Enabling OSPFv3 Graceful Restart....................................................................................................................... 603
OSPFv3 Authentication Using IPsec.....................................................................................................................605
Troubleshooting OSPFv3..........................................................................................................................................611
36 Policy-based Routing (PBR).....................................................................................................................612
Overview......................................................................................................................................................................... 612
Implementing PBR..........................................................................................................................................................613
Conguration Task List for Policy-based Routing.......................................................................................................613
PBR Exceptions (Permit)........................................................................................................................................ 614
Create a Redirect List.................................................................................................................................................... 614
Create a Rule for a Redirect-list................................................................................................................................... 614
Apply a Redirect-list to an Interface using a Redirect-group.................................................................................... 616
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