Presented by Wendell Odom, CCIE No pearsonITcertification.com/odom OSPF Concepts and Configuration

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R4 Fa0/ Captured at 150 % mag for OneNote S0/0/0 S0/0/1 S0/1/0 S0/0/1 S0/0/0 R1 R2R3R4 Today’s Sample Network For copies of key figures during the live show, browse to Certskills.com, lower right.

Fa0/ S0/0/0 S0/0/1 S0/1/0 R network Welcome – Our Agenda Today

OSPF Configuration Options 1)Enable OSPF ( router ospf process-id ) 2)Enable OSPF on interfaces ( network DDN WC_mask area area-id ) 3)Set Router ID( router-id DDN, or interface loopback number ) 4)Set Hello and Dead Intervals( ip ospf hello-interval number, ip ospf dead-interval number ) 5)Tune OSPF metrics( ip ospf cost number, or bandwidth number, or auto-cost-reference-bandwidth number ) 6)Enable OSPF authentication( ip ospf authentication, or area authentication ) 7)Set Number of equal routes( maximum-paths number )

Likely Points of CCNA Config Confusion 1)Mechanics of network commands and wildcard masks 2)“Best” options for same 3)OSPF Process ID matching (or not) 4)Unique OSPF Router ID

Exact Match ( ) Match Subnet ( – Subnet_Mask) Match Classful Network ( – Network_Mask) Match All ( ) OSPF WC Mask Options

Fa0/ S0/0/0 S0/0/1 S0/1/0 R network Exact Match

Exact Match ( ) Match Subnet ( – Subnet_Mask) Match Classful Network ( – Network_Mask) Match All ( ) OSPF WC Mask Options

Match Subnet Wildcard Mask Subnet Mask

Fa0/ S0/0/0 S0/0/1 S0/1/0 R network network Match Subnet

Exact Match ( ) Match Subnet ( – Subnet_Mask) Match Classful Network ( – Network_Mask) Match All ( ) OSPF WC Mask Options

Match Class A Network Wildcard Mask Default Class A Network Mask

Fa0/ S0/0/0 S0/0/1 S0/1/0 R network network Match Network

Exact Match ( ) Match Subnet ( – Subnet_Mask) Match Classful Network ( – Network_Mask) Match All ( ) OSPF WC Mask Options

Fa0/ S0/0/0 S0/0/1 S0/1/0 R network network Match All

Exact Match ( ) Match Subnet ( – Subnet_Mask) Match Classful Network ( – Network_Mask) Match All ( )

R4 Fa0/ Captured at 150 % mag for OneNote S0/0/0 S0/0/1 S0/1/0 S0/0/1 S0/0/0 R1 R2R3R4 Single Area OSPF Design Area 0

R4 Fa0/ Captured at 150 % mag for OneNote S0/0/0 S0/0/1 S0/1/0 S0/0/1 S0/0/0 R1 R2R3R4 Single Area OSPF Config router ospf 1 network area 0 router ospf 1 network area 0 router ospf 1 network area 0 router ospf 4 network area 0 network area 0

R4 Fa0/ Captured at 150 % mag for OneNote S0/0/0 S0/0/1 S0/1/0 S0/0/1 S0/0/0 R1 R2R3R4 Multi-Area OSPF Design Area 0 Area 14

R4 Fa0/ Captured at 150 % mag for OneNote S0/0/0 S0/0/1 S0/1/0 S0/0/1 S0/0/0 R1 R2R3R4 Multi-Area OSPF Config router ospf 1 network area 0 network area 0 network area 0 network area 14 (Unchanged) router ospf 4 network area 14 network area 14 (Unchanged)

R4 Fa0/ Captured at 150 % mag for OneNote S0/0/0 S0/0/1 S0/1/0 S0/0/1 S0/0/0 R1 R2R3R4 What are the OSPF Router IDs?

WendellOdom Like WendellOdom More Resources Find lists of Cisco certification tools, suggestions, & links at certskills.comcertskills.com Register to win a CCNA Exam and CCNA Products at pearsonitcertification.com/ccnasalepearsonitcertification.com/ccnasale Ends March 31, 2012 Wendell’s Blogs, including an OSPF lab related to today’s webinar: certskills.com/blogscertskills.com/blogs

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Q&A

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