Users Guide

Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationExample Running-Conguration.....................................................................................................632
Debugging and Verifying MSTP Congurations........................................................................................................ 635
33 Multicast Features................................................................................................................................... 637
Enabling IP Multicast.....................................................................................................................................................637
Implementation Information..........................................................................................................................................637
First Packet Forwarding for Lossless Multicast.........................................................................................................638
Multicast Policies...........................................................................................................................................................638
IPv4 Multicast Policies............................................................................................................................................ 638
Understanding Multicast Traceroute (mtrace).......................................................................................................... 645
Important Points to Remember............................................................................................................................. 646
Printing Multicast Traceroute (mtrace) Paths........................................................................................................... 646
Supported Error Codes................................................................................................................................................. 647
mtrace Scenarios...........................................................................................................................................................648
34 Object Tracking....................................................................................................................................... 654
Object Tracking Overview............................................................................................................................................ 654
Track Layer 2 Interfaces......................................................................................................................................... 655
Track Layer 3 Interfaces......................................................................................................................................... 655
Track IPv4 and IPv6 Routes...................................................................................................................................656
Track a Metric Threshold........................................................................................................................................656
Tracking a Metric Threshold...................................................................................................................................656
Track Route Reachability........................................................................................................................................ 658
Tracking Route Reachability................................................................................................................................... 658
Set Tracking Delays................................................................................................................................................. 659
VRRP Object Tracking............................................................................................................................................ 659
Object Tracking Conguration..................................................................................................................................... 660
Tracking a Layer 2 Interface................................................................................................................................... 660
Tracking a Layer 3 Interface....................................................................................................................................661
Displaying Tracked Objects...........................................................................................................................................662
35 Open Shortest Path First (OSPFv2 and OSPFv3)....................................................................................664
Protocol Overview.........................................................................................................................................................664
Autonomous System (AS) Areas........................................................................................................................... 664
Area Types................................................................................................................................................................ 665
Networks and Neighbors........................................................................................................................................666
Router Types............................................................................................................................................................ 666
Designated and Backup Designated Routers.......................................................................................................668
Link-State Advertisements (LSAs)........................................................................................................................668
Virtual Links..............................................................................................................................................................669
Router Priority and Cost.........................................................................................................................................669
OSPF Implementation................................................................................................................................................... 670
Fast Convergence (OSPFv2, IPv4 Only)...............................................................................................................671
Multi-Process OSPFv2 (IPv4 only)........................................................................................................................ 671
RFC-2328 Compliant OSPF Flooding.................................................................................................................... 671
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