Users Guide

Printing Multicast Traceroute (mtrace) Paths........................................................................................................... 636
Supported Error Codes................................................................................................................................................. 637
mtrace Scenarios...........................................................................................................................................................638
34 Object Tracking........................................................................................................................................644
Object Tracking Overview............................................................................................................................................ 644
Track Layer 2 Interfaces..........................................................................................................................................645
Track Layer 3 Interfaces..........................................................................................................................................645
Track IPv4 and IPv6 Routes................................................................................................................................... 646
Track a Metric Threshold........................................................................................................................................646
Tracking a Metric Threshold...................................................................................................................................646
Track Route Reachability........................................................................................................................................ 648
Tracking Route Reachability................................................................................................................................... 648
Set Tracking Delays................................................................................................................................................. 649
VRRP Object Tracking............................................................................................................................................ 649
Object Tracking Conguration..................................................................................................................................... 650
Tracking a Layer 2 Interface...................................................................................................................................650
Tracking a Layer 3 Interface....................................................................................................................................651
Displaying Tracked Objects...........................................................................................................................................652
35 Open Shortest Path First (OSPFv2 and OSPFv3)................................................................................... 654
Protocol Overview.........................................................................................................................................................654
Autonomous System (AS) Areas........................................................................................................................... 654
Area Types................................................................................................................................................................ 655
Networks and Neighbors........................................................................................................................................656
Router Types............................................................................................................................................................ 656
Designated and Backup Designated Routers.......................................................................................................658
Link-State Advertisements (LSAs)........................................................................................................................658
Virtual Links..............................................................................................................................................................659
Router Priority and Cost.........................................................................................................................................659
OSPF Implementation...................................................................................................................................................660
Fast Convergence (OSPFv2, IPv4 Only)...............................................................................................................661
Multi-Process OSPFv2 (IPv4 only)........................................................................................................................661
RFC-2328 Compliant OSPF Flooding.................................................................................................................... 661
OSPF ACK Packing................................................................................................................................................. 662
Setting OSPF Adjacency with Cisco Routers...................................................................................................... 662
Conguration Information.............................................................................................................................................663
Conguration Task List for OSPFv2 (OSPF for IPv4)........................................................................................ 663
Sample Congurations for OSPFv2............................................................................................................................ 675
Basic OSPFv2 Router Topology.............................................................................................................................675
OSPF Area 0 — Te 1/1 and 1/2..............................................................................................................................676
OSPF Area 0 — Te 3/1 and 3/2............................................................................................................................ 676
OSPF Area 0 — Te 2/1 and 2/2............................................................................................................................ 677
Conguration Task List for OSPFv3 (OSPF for IPv6)...............................................................................................677
Enabling IPv6 Unicast Routing...............................................................................................................................678
Assigning IPv6 Addresses on an Interface............................................................................................................678
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