CCNA 3 v7.0 Curriculum: Module 2 – Single-Area OSPFv2 Configuration PDF

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Summary

Welcome to Single-Area OSPFv2 Configuration!

Now that you know about single-area OSPFv2, you can probably think of all the ways it could benefit your own network. As a link-state protocol, OSPF is designed to not only find the fastest available route, it is designed to create fast, avai...

Description

CCNA 3 v7.0 Curriculum Mục lục: CCNA 3 v7.0 Curriculum: Module 2 – Single-Area OSPFv2 Configuration....................................................8 2.0. Introduction......................................................................................................................................8 2.0.1. Why should I take this module?.................................................................................................8 2.0.2. What will I learn to do in this module?......................................................................................8 2.1. OSPF Router ID.................................................................................................................................9 2.1.1. OSPF Reference Topology..........................................................................................................9 2.1.2. Router Configuration Mode for OSPF.......................................................................................10 2.1.3. Router IDs................................................................................................................................10 2.1.4. Router ID Order of Precedence................................................................................................11 2.1.5. Configure a Loopback Interface as the Router ID.....................................................................12 2.1.6. Explicitly Configure a Router ID................................................................................................13 2.1.7. Modify a Router ID...................................................................................................................14 2.1.8. Syntax Checker – Configure R2 and R3 Router IDs...................................................................15 2.2.1. The network Command Syntax................................................................................................16 2.2.2. The Wildcard Mask..................................................................................................................17 2.2.4. Configure OSPF Using the network Command.........................................................................18 2.2.5. Syntax Checker – Configure R2 and R3 Using the network Command.....................................19 2.2.6. Configure OSPF Using the ip ospf Command...........................................................................20 2.2.7. Syntax Checker – Configure R2 and R3 Using the ip ospf Command........................................21 2.2.8. Passive Interface......................................................................................................................22 2.2.9. Configure Passive Interfaces....................................................................................................23 2.2.10. Syntax Checker – Configure R2 and R3 Passive Interfaces......................................................24 2.2.11. OSPF Point-to-Point Networks...............................................................................................27 2.2.12. Loopbacks and Point-to-Point Networks................................................................................30 2.2.13. Packet Tracer – Point-to-Point Single-Area OSPFv2 Configuration.........................................30 2.2.13 Packet Tracer – Point-to-Point Single-Area OSPFv2 Configuration......................................31 

Packet Tracer – Point-to-Point Single-Area OSPFv2 Configuration (Answers).....................31

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Packet Tracer – Point-to-Point Single-Area OSPFv2 Configuration (Instructor Version)......31 o

Addressing Table............................................................................................................32

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Objectives......................................................................................................................32

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Background....................................................................................................................32

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Instructions....................................................................................................................33 Part 1: Configure router IDs...............................................................................................33 Part 2: Configure Networks for OSPF Routing....................................................................33 Part 3: Configure Passive Interfaces...................................................................................35 Part 4: Verify OSPF Configuration.......................................................................................36

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Answer Scripts................................................................................................................38 Router R1...........................................................................................................................38 Router R2...........................................................................................................................39 Router R3...........................................................................................................................39

2.3. Multiaccess OSPF Networks............................................................................................................39 2.3.1. OSPF Network Types................................................................................................................39 2.3.2. OSPF Designated Router..........................................................................................................40 2.3.3. OSPF Multiaccess Reference Topology.....................................................................................41 2.3.4. Verify OSPF Router Roles.........................................................................................................42  Untitled..................................................................................................................................42  R2 BDR...................................................................................................................................44  R3 DR.....................................................................................................................................46 2.3.5. Verify DR/BDR Adjacencies......................................................................................................47 R1 Adjacencies...............................................................................................................................48 R2 Adjacencies...............................................................................................................................48 R3 Adjacencies...............................................................................................................................49 2.3.6. Default DR/BDR Election Process.............................................................................................49 2.3.7. DR Failure and Recovery..........................................................................................................51 R3 Fails...........................................................................................................................................51 R3 Re-Joins Network......................................................................................................................52 R4 Joins Network...........................................................................................................................53 R2 Fails...........................................................................................................................................53 2.3.8. The ip ospf priority Command.................................................................................................54 2.3.9. Configure OSPF Priority............................................................................................................54 2.3.10. Syntax Checker – Configure OSPF Priority..............................................................................56 2.3.11. Packet Tracer – Determine the DR and BDR...........................................................................62

2.3.11 Packet Tracer – Determine the DR and BDR........................................................................62 

Addressing Table............................................................................................................63

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Objectives......................................................................................................................63

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Scenario.........................................................................................................................64

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Instructions....................................................................................................................64 Part 1: Examine DR and BDR Changing Roles.....................................................................64 Step 1: Wait until the amber link lights turn green......................................................64 Step 2: Verify the current OSPF neighbor states...........................................................65 Step 3: Turn on IP OSPF adjacency debugging..............................................................65 Step 4: Disable the Gigabit Ethernet 0/0 interface on RC.............................................66 Step 5: Restore the Gigabit Ethernet 0/0 interface on RC............................................67 Step 6: Disable the GigabitEthernet0/0 interface on RB..............................................68 Step 7: Restore the GigabitEthernet0/0 interface on RB..............................................68 Step 8: Turn off Debugging............................................................................................68 Part 2: Modify OSPF Priority and Force Elections...............................................................68 Step 1: Configure OSPF priorities on each router..........................................................68 Step 2: Force an election by resetting the OSPF process on the routers......................69 Step 3: Verify DR and BDR elections were successful.....................................................69

2.4. Modify Single-Area OSPFv2............................................................................................................69 2.4.1. Cisco OSPF Cost Metric............................................................................................................69 2.4.2. Adjust the Reference Bandwidth.............................................................................................70 2.4.3. OSPF Accumulates Costs..........................................................................................................72 2.4.4. Manually Set OSPF Cost Value.................................................................................................74 2.4.5. Test Failover to Backup Route..................................................................................................76 2.4.6. Syntax Checker – Modify the Cost Values for R2 and R3..........................................................76 2.4.7. Hello Packet Intervals...............................................................................................................78 2.4.8. Verify Hello and Dead Intervals................................................................................................79 2.4.9. Modify OSPFv2 Intervals..........................................................................................................80 2.4.10. Syntax Checker – Modifying Hello and Dead Intervals on R3.................................................82 2.4.11. Packet Tracer – Modify Single-Area OSPFv2...........................................................................83 2.4.11 Packet Tracer – Modify Single-Area OSPFv2........................................................................83 

Addressing Table................................................................................................................84

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Objectives..........................................................................................................................85

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Scenario.............................................................................................................................85

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Instructions........................................................................................................................85 Part 1: Modify OSPF Default Settings.....................................................................................85 Step 1: Test connectivity between all end devices.............................................................85 Step 2: Adjust the hello and dead timers between R1 and R2...........................................85 Step 3: Adjust the bandwidth setting on R1.......................................................................86 Part 2: Verify Connectivity......................................................................................................87 Router R1.......................................................................................................................87 Router R2.......................................................................................................................87

2.5. Default Route Propagation..............................................................................................................87 2.5.1. Propagate a Default Static Route in OSPFv2.............................................................................87 2.5.2. Verify the Propagated Default Route.......................................................................................89 2.5.3. Packet Tracer – Propagate a Default Route in OSPFv2.............................................................91 2.5.3 Packet Tracer – Propagate a Default Route in OSPFv2.....................................................92 

Addressing Table............................................................................................................92

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Objectives......................................................................................................................93

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Background....................................................................................................................93

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Instructions....................................................................................................................93 Part 1: Propagate a Default Route......................................................................................93 Step 1: Test connectivity to the Web Server.................................................................93 Step 2: Configure a default route on R2........................................................................94 Step 3: Propagate the route in OSPF.............................................................................94 Step 4: Examine the routing tables on R1 and R3.........................................................94 Part 2: Verify Connectivity..................................................................................................95 Router R2.......................................................................................................................95

2.6.1. Verify OSPF Neighbors.............................................................................................................95 2.6.2. Verify OSPF Protocol Settings...................................................................................................97 2.6.3. Verify OSPF Process Information..............................................................................................98 2.6.4. Verify OSPF Interface Settings................................................................................................100 2.6.5. Syntax Checker – Verify Single-Area OSPFv2..........................................................................101 2.6.6. Packet Tracer – Verify Single-Area OSPFv2.............................................................................112 2.6.6 Packet Tracer – Verify Single-Area OSPFv2..........................................................................112 

Addressing Table..............................................................................................................112

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Objectives........................................................................................................................113

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Background / Scenario.....................................................................................................114

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Instructions......................................................................................................................114 Part 1: Verify the existing OSPFv2 network operation..........................................................114 Step 1: Verify OSPFv2 operation on R1...........................................................................114 Step 2: Verify OSPFv2 operation on R2...........................................................................116 Step 3: Verify OSPFv2 operation on R3...........................................................................118 Part 2: Add the new Branch Office LAN to the OSPFv2 network..........................................119 Step 1: Verify the OSPFv2 configuration on router R4....................................................119 Step 2: Connect the Branch Office router R4 to the OSPFv2 network............................120

2.7. Module Practice and Quiz.............................................................................................................122 2.7.1. Packet Tracer – Single-Area OSPFv2 Configuration................................................................122 2.7.1 Packet Tracer – Single-Area OSPFv2 Configuration.............................................................122 

Addressing Table..............................................................................................................123

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Objectives........................................................................................................................124

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Background......................................................................................................................124

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Instructions......................................................................................................................125

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Requirements...................................................................................................................125 • Activate OSPF using network statements and inverse masks on the routers in the Headquarters network..................................................................................................125 • Activate OSPF by configuring the interfaces of the network devices in the Data Service network, where required........................................................................................126 • Configure router IDs on the multiaccess network routers as follows:...............................126 • Configure OSPF so that routing updates are not sent into networks where they are not required...............................................................................................................................127 • Configure router BC-1 with the highest OSPF interface priority so that it will always be the designated router of the multiaccess network....................................................................128 • Configure a default route to the ISP cloud using the exit interface command argument..128 •Automati...