3Com S7902E, Руководство по настройке

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Table of Contents
1 OSPF Configuration ··································································································································1-1
Introduction to OSPF·······························································································································1-1
Basic Concepts································································································································1-2
OSPF Area Partition ························································································································1-3
Router Types ···································································································································1-7
Classification of OSPF Networks ····································································································1-8
DR and BDR····································································································································1-9
OSPF Packet Formats···················································································································1-10
Supported OSPF Features ············································································································1-18
Protocols and Standards ···············································································································1-21
OSPF Configuration Task List ··············································································································1-21
Enabling OSPF ·····································································································································1-23
Prerequisites··································································································································1-23
Configuration Procedure················································································································1-23
Configuring OSPF Areas·······················································································································1-24
Prerequisites··································································································································1-24
Configuring a Stub Area ················································································································1-24
Configuring an NSSA Area············································································································1-25
Configuring a Virtual Link ··············································································································1-26
Configuring OSPF Network Types········································································································1-26
Prerequisites··································································································································1-27
Configuring the OSPF Network Type for an Interface as Broadcast ············································1-27
Configuring the OSPF Network Type for an Interface as NBMA ··················································1-27
Configuring the OSPF Network Type for an Interface as P2MP ···················································1-28
Configuring the OSPF Network Type for an Interface as P2P ······················································1-29
Configuring OSPF Route Control··········································································································1-29
Prerequisites··································································································································1-29
Configuring OSPF Route Summarization······················································································1-30
Configuring OSPF Inbound Route Filtering···················································································1-31
Configuring ABR Type-3 LSA Filtering··························································································1-31
Configuring an OSPF Cost for an Interface···················································································1-32
Configuring the Maximum Number of OSPF Routes ····································································1-33
Configuring the Maximum Number of Load-balanced Routes ······················································1-33
Configuring a Priority for OSPF·····································································································1-33
Configuring OSPF Route Redistribution························································································1-34
Advertising a Host Route···············································································································1-35
Configuring OSPF Network Optimization······························································································1-36
Prerequisites··································································································································1-36
Configuring OSPF Packet Timers ·································································································1-36
Specifying an LSA Transmission Delay ························································································1-37
Specifying SPF Calculation Interval ······························································································1-38
Specifying the LSA Minimum Repeat Arrival Interval····································································1-38
Specifying the LSA Generation Interval ························································································1-39