3Com 5500-EI PWR Install Manual page 262

4 OSPF Configuration ··································································································································4-1
OSPF Overview ······································································································································4-1
Introduction to OSPF ·······················································································································4-1
OSPF Route Calculation ·················································································································4-2
Basic OSPF Concepts·····················································································································4-2
OSPF Area Partition and Route Summarization ·············································································4-4
OSPF Network Type······················································································································4-10
DR/BDR·········································································································································4-10
OSPF Features······························································································································4-12
OSPF Configuration Task List ··············································································································4-12
Basic OSPF Configuration ····················································································································4-13
Configuration Prerequisites ···········································································································4-13
Basic OSPF Configuration ············································································································4-13
OSPF Area Attribute Configuration·······································································································4-15
Configuration Prerequisites ···········································································································4-15
Configuring OSPF Area Attributes ································································································4-15
OSPF Network Type Configuration·······································································································4-16
Configuration Prerequisites ···········································································································4-16
Configuring the Network Type of an OSPF Interface····································································4-16
Configuring an NBMA/P2MP Neighbor ·························································································4-17
Configuring the DR Priority on an OSPF Interface········································································4-18
OSPF Route Control ·····························································································································4-18
Configuration Prerequisites ···········································································································4-18
Configuring OSPF Route Summarization······················································································4-18
Configuring OSPF to Filter Received Routes················································································4-19
Configuring the OSPF Cost on an Interface··················································································4-20
Configuring OSPF Route Priority ··································································································4-20
Configuring the Maximum Number of OSPF ECMP Routes·························································4-20
Configuring OSPF to Redistribute External Routes ······································································4-21
OSPF Network Adjustment and Optimization ·······················································································4-21
Configuration Prerequisites ···········································································································4-22
Configuring OSPF Timers ·············································································································4-22
Configuring the LSA transmission delay ·······················································································4-23
Configuring the SPF Calculation Interval ······················································································4-23
Disabling OSPF Packet Transmission on an Interface ·································································4-24
Configuring OSPF Authentication ·································································································4-24
Configuring the MTU Field in DD Packets·····················································································4-25
Enabling OSPF Logging of Neighbor State Changes ···································································4-25
Configuring OSPF Network Management ·····················································································4-26
Displaying and Maintaining OSPF Configuration··················································································4-26
OSPF Configuration Examples ·············································································································4-27
Configuring DR/BDR Election ·······································································································4-27
Configuring OSPF Virtual Link ······································································································4-29
Troubleshooting OSPF Configuration ···································································································4-31
Unable to Establish a Neighbor Relationship between Routers····················································4-31
Unable to Learn a Complete Network Topology ···········································································4-32
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