Post on 04-Apr-2018
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Configuring OSPF
BSCI Module 3
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Link-State Protocols
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Link-State Data Structures
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Link-State Routing Protocols
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Link-State Data Structure: Network Hierarchy
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OSPF Areas
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Area Terminology
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OSPF Adjacencies
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Forming OSPF Adjacencies
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OSPF Calculation
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SPF Calculation
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Link-State Data Structures: LSA Operation
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OSPF Packet Types
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OSPF Packet Header Format
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Neighborship: The Hello Packet
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Establishing Bidirectional Communication
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Discovering The Network Routes
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Adding the Link-State Entries
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Maintaining Routing Information
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LSA Sequence Numbering
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LSA Sequence Numbers and Maximum Age
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Debug ip ospf packet
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Configuring Basic OSPF
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Configuring OSPF on Internal Routers of a Single Area
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Configuring OSPF for Multiple Areas
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OSPF Router ID
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Loopback Interfaces
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OSPF router-id Command
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OSPF Router-ID Verification
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Verifying OSPF Operation
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Verifying OSPF Operation (Cont.)
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Example: The show ip ospf interface Command
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Example: The show ip ospf neighbor Command
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OSPF Network Types
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Point-to-Point Links
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Multiaccess Broadcast Network
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Electing The DR and BDR
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Setting Priority for DR Election
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NBMA Topology
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DR Election in NBMA Topology
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Frame Relay Topology
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OSPF over NBMA Topology Modes of Operation
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Selecting The OSPF Network Type for NBMA Network
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Nonbroadcast Mode (NBMA Mode)
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Using the neighbor Command
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Neighbor Command Example
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The show ip ospf neighbor Command
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Point-to-Multipoint Mode
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Point-to-Multipoint Configuration
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Point-to-Multipoint Example
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Point-to-Multipoint Nonbroadcast
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Using SubInterfaces
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Point-to-Point SubInterfaces
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Point-to-Point SubInterface Example
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Multipoint Subinterfaces
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Multipoint Subinterface Example
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OSPF over NBMA Topology Summary
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Creation of Adjacencies for Point-to-Point Mode
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Creation of Adjacencies for Broadcast Mode
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Issue with Maintaining a Large OSPF Network
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The Solution: OSPF Hierarchical Routing
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Types of OSPF Routers
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Defining Virtual Links
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Configuring Virtual Links
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OSPF Virtual Link Configuration Example
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The show ip ospf virtual-links Command
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LSA Types
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LSA Type 1: Router LSA
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LSA Type 2: Network LSA
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LSA Type 3: Summary LSA
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LSA Type 4: Summary LSA
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LSA Type 5: External LSA
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Interpreting the OSPF Database
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Interpreting the Routing Table: Types of Routes
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Calculating Costs for E1 and E2 Routes
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The show ip route Command
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OSPF LSDB Overload Protection
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Changing the Cost Metric
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Benefits of Route Summarization
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Using Route Summarization
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Configuring Route Summarization
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Route Summarization Configuration Example at ABR
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Default Route in OSPF
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Configuring OSPF Default Routes
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Default Route Configuration Example
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Types of Areas
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Stub and Totally Stub Area Rules
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Using Stub Areas
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Stub Area Configuration
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OSPF Stub Area Configuration Example
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Using Totally Stubby Areas
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Totally Stubby Configuration
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Totally Stubby Configuration Example
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Routing Table in a Standard Area
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Routing Table in a Stub Area
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Routing Table in a Stub Area with Summarization
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Routing Table in a Totally Stubby Area
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Not-So-Stubby Areas
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NSSA Configuration
SS C f
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Example: NSSA Configuration
NSSA T t ll St bb C fi ti
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NSSA Totally Stubby Configuration
Sh C d f St b d NSSA
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Show Command for Stub and NSSA
OSPF A th ti ti T
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OSPF Authentication Types
C fi i OSPF Si l P d A th ti ti
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Configuring OSPF Simple Password Authentication
Example Simple Password Authentication Configuration
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Example Simple Password Authentication Configuration
R2 Configuration for Simple Password Authentication
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R2 Configuration for Simple Password Authentication
Verifying Simple Password Authentication
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Verifying Simple Password Authentication
Configuring OSPF MD5 Authentication
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Configuring OSPF MD5 Authentication
Example MD5 Authentication Configuration
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Example MD5 Authentication Configuration
R2 Configuration for MD5 Authentication
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R2 Configuration for MD5 Authentication
Verifying MD5 Authentication
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Verifying MD5 Authentication
Troubleshooting Simple Password Authentication
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Troubleshooting Simple Password Authentication
Troubleshooting Simple Password Authentication Problems
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Troubleshooting Simple Password Authentication Problems
Troubleshooting MD5 Authentication
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Troubleshooting MD5 Authentication
Troubleshooting MD5 Authentication Problems
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Troubleshooting MD5 Authentication Problems
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