Transcript CCNA 3 Module 3 Single-Area OSPF

CCNA 3 Chapter 3
Single-Area OSPF
By
Your Name
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Objectives
• Link-state routing protocol
• Single-area OSPF concepts
• Single-area OSPF configuration
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Overview of Link-State and
Distance Vector Routing
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Link-State Routing Features
• Respond quickly to network
changes
• Send triggered updates only
when a network change has
occurred
• Send periodic updates
known as link-state
refreshes
• Use a hello mechanism to
determine the reachability of
neighbors
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How Routing Information Is
Maintained
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Link-State Routing Algorithms
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Advantages and Disadvantages
of Link-State Routing
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Comparing Distance Vector and
Link-State Routing
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Single-Area OSPF Concepts
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OSPF Overview
OSPF is becoming the preferred IGP protocol
when compared with RIPv1 and RIPv2
because it is scalable.
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OSPF Terminology
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Comparing OSPF with Distance
Vector Routing Protocols
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Shortest Path Algorithm
The best path is the lowest-cost path.
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OSPF Network Types
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OSPF Hello Protocol
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Steps in the Operation of OSPF
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Single-Area OSPF Configuration
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Configuring the OSPF
Routing Process
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Configuring OSPF Loopback
Address and Router Priority
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Configuring Router Priority
The priorities can be set to any value from 0 to 255. A value of 0
prevents that router from being elected. A router with the highest
OSPF priority will win the election for DR.
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Modifying OSPF Cost Metric
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Configuring OSPF Authentication
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Configuring OSPF Timers
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OSPF, Propagating a
Default Route
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Common OSPF
Configuration Issues
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Verifying OSPF Configuration
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show ip protocol
show ip route
show ip ospf interface
shop ip ospf
show ip ospf neighbor detail
show ip ospf database
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The debug and clear Commands
for OSPF Verification
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