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Modifying the Interface Parameters.................................................................................................601
Configuring an EdgePort..................................................................................................................602
Flush MAC Addresses after a Topology Change.............................................................................603
MSTP Sample Configurations.......................................................................................................... 603
Router 1 Running-ConfigurationRouter 2 Running-ConfigurationRouter 3 Running-
ConfigurationExample Running-Configuration........................................................................604
Debugging and Verifying MSTP Configurations..............................................................................607
34 Multicast Features..........................................................................................610
Enabling IP Multicast.........................................................................................................................610
Multicast with ECMP.........................................................................................................................610
Implementation Information.............................................................................................................611
First Packet Forwarding for Lossless Multicast................................................................................ 612
Multicast Policies...............................................................................................................................612
IPv4 Multicast Policies.................................................................................................................612
35 Open Shortest Path First (OSPFv2 and OSPFv3)...................................... 620
Protocol Overview............................................................................................................................620
Autonomous System (AS) Areas.................................................................................................620
Area Types................................................................................................................................... 621
Networks and Neighbors............................................................................................................622
Router Types............................................................................................................................... 622
Designated and Backup Designated Routers............................................................................ 624
Link-State Advertisements (LSAs)...............................................................................................624
Virtual Links.................................................................................................................................626
Router Priority and Cost.............................................................................................................626
OSPF Implementation.......................................................................................................................627
Fast Convergence (OSPFv2, IPv4 Only)..................................................................................... 627
Multi-Process OSPFv2 (IPv4 only)..............................................................................................627
RFC-2328 Compliant OSPF Flooding........................................................................................628
OSPF ACK Packing......................................................................................................................629
Setting OSPF Adjacency with Cisco Routers.............................................................................629
Configuration Information...............................................................................................................630
Configuration Task List for OSPFv2 (OSPF for IPv4)................................................................. 630
Sample Configurations for OSPFv2................................................................................................. 645
Basic OSPFv2 Router Topology................................................................................................. 645
OSPF Area 0 — Te 1/1 and 1/2....................................................................................................645
OSPF Area 0 — Te 3/1 and 3/2...................................................................................................646
OSPF Area 0 — Te 2/1 and 2/2...................................................................................................646
Configuration Task List for OSPFv3 (OSPF for IPv6)....................................................................... 646
Enabling IPv6 Unicast Routing................................................................................................... 647
Assigning IPv6 Addresses on an Interface..................................................................................647