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  • CCNA ICND2 640-816 Lab – OSPF Simulation

    Wednesday, August 11th, 2010

    A sporting goods manufacturer has decided to network three (3) locations to improve efficiency in inventory control. The routers have been named to reflect the location: Boston, Frankfurt, and Lancaster. The necessary networking has been completed at each location, and the routers have been configured with single area OSPF as the routing protocol. The Lancaster […]

    CCNA ICND2 Lab 10 – Configure OSPF Protocol in a Single Area

    Monday, July 26th, 2010

    Lab Topology: Lab Requirements: 1. The router names are P4S1, P4S2 and P4S3.

    CCNP BSCI Notes – OSPF Network Topologies

    Tuesday, March 30th, 2010

    OSPF Network Topology Options OSPF assumes a subnet is broadcast-capable by default. OSPF Network Types Broadcast multiaccess Point-to-point Point-to-multipoint broadcast Point-to-multipoint nonbroadcast Nonbroadcast multiaccess (NBMA)

    CCNP BSCI Notes – Understanding Simple Single-Area OSPF

    Thursday, November 19th, 2009

    OSPF Fundamentals Link-state routing protocols utilize more internal resources in favor of reducing bandwidth consumption. All OSPF routers in an area share the same Link State Database (LSDB). Link State Advertisements (LSAs) are flooded to all neighboring routers. OSPF tables:

    OSPF Convergence

    Monday, August 24th, 2009

    Resiliency and redundancy to circuit failure is provided by the convergence capabilities of OSPF at layer 3. There are two components to OSPF routing convergence: detection of topology changes and recalculation of routes. Detection of topology changes is supported in two ways by OSPF. The first, and quickest, is a failure or change of status  […]

    CCNA 640-802 Bible – Configure,Verify and Troubleshoot OSPF(2)

    Friday, August 21st, 2009

    1. Refer to the exhibit. Router1 was just successfully rebooted. Identify the current OSPF router ID for Router1. A: B: C:

    CCNA 640-802 Bible – Configure,Verify and Troubleshoot OSPF(1)

    Friday, August 21st, 2009

    1. The OSPF Hello protocol performs which of the following tasks? (Choose two.) A:It provides dynamic neighbor discovery. B:It detects unreachable neighbors in 90 second intervals. C:It maintains neighbor relationships. D:It negotiates correctness parameters between neighboring interfaces. E:It uses timers to elect the router with the fastest links as the designated router. F:It broadcasts hello […]

    Freedown – OSPF: Anatomy of an Internet Routing Protocol

    Thursday, August 6th, 2009

    Written for TCP/IP network administrators, protocol designers, and network application developers, this book gives the most complete and practical view ever into the inner workings of Internet routing. The book focuses on OSPF (Open Shortest Path First), a common TCP/IP routing protocol that provides robust and efficient routing support in the most demanding Internet environments. […]

    OSPF – Things to Remember

    Monday, August 3rd, 2009

    1. The IP header of an OSPF packet specifies protocol number 89. 2. To establish OSPF neighbor adjacency, hello/dead timers, MTU (otherwise have to use "ip ospf mtu-ignore") must match. Unique router-id is also required. 3. Routers in stub area can only be adjacent with the routers in stubs or totally stubby area. Routers in […]