Types of Areas Supported by Ospfv3: [Essay Example], 448 words GradesFixer
This essay has been submitted by a student. This is not an example of the work written by professional essay writers.

Types of Areas Supported by Ospfv3

downloadDownload printPrint

Pssst… we can write an original essay just for you.

Any subject. Any type of essay.

We’ll even meet a 3-hour deadline.

Get your price

121 writers online

Download PDF

OSPFv3 supports different types of areas depending on the requirements of a network. These areas are:

Pssst... we can write an original essay just for you

Any subject. Any type of essay.

We’ll even meet a 3-hour deadline.

121 writers online
  • Normal Area: Normal area also referred to as regular area connects to the backbone area via one or more area border routers. The link state advertisement (LSA) types that are exchanged between a normal area and the backbone area are the Inter–Area– Prefix LSAs and AS External LSAs. ASBRs are used in normal Areas.
  • Stub Area: In order to reduce the amount of external routing information that is flooded in an area, that area can be configured as a stub area. A stub Area also connects to the autonomous systems backbone Area via one or more ABRs but does not allow the use of internal ASBRs and flooding of AS External LSAs, since these LSAs are normally flooded all over the autonomous system to disseminate external route information. A stub area uses Inter–Area–Prefix LSA as a default route for all routing information that needs to be forwarded via the backbone area to the external autonomous system. For IPv6, prefix length of this LSA is set to 0.
  • Not–So–Stubby–Area (NSSA): NSSA is like a stub area. However, in an NSSA, ASBR is used to allow autonomous system external routes into an NSSA using redistribution. The ASBR redistributes the external routes and then generates type 7 LSAs that are flooded within the NSSA. In NSSA, Type 5 LSA is not allowed. However, an ABR can be optionally configured to connect the NSSA to other areas to convert type 7 LSAs to Type 5 LSAs and then floods these converted LSAs all over the autonomous system (Cisco.com, 2016).

Designated Router (DR) and Backup Designated Router (BDR)

Different types of networks present OSPF with a unique challenge to manage. A network could be point–to–point or a multiple access network providing a shared medium for multiple routers to communicate. In a multiple access network, if each router floods the network with LSAs, the same information about a link state will be forwarded from multiple sources, leading to a large amount of router CPU load and bandwidth consumption. In a multi–access network, OSPF uses a single router called designated router (DR) to control how LSAs are flooded. The purpose of using the DR is to minimize the number of adjacencies formed so that all topology tables on routers can be synchronized.

A backup designated router (BDR) is a hot standby router for the DR in the same network type. The BDR receives LSA packets and routing updates from OSPF adjacent routers but does not flood the LSA updates. The BDR only works if the DR fails. Each router in a multiple access network establishes adjacency with the DR and the BDR.

infoRemember: This is just a sample from a fellow student.

Your time is important. Let us write you an essay from scratch

100% plagiarism-free

Sources and citations are provided

Find Free Essays

We provide you with original essay samples, perfect formatting and styling

Cite this Essay

To export a reference to this article please select a referencing style below:

Types of Areas Supported by Ospfv3. (2019, January 03). GradesFixer. Retrieved April 19, 2021, from https://gradesfixer.com/free-essay-examples/types-of-areas-supported-by-ospfv3/
“Types of Areas Supported by Ospfv3.” GradesFixer, 03 Jan. 2019, gradesfixer.com/free-essay-examples/types-of-areas-supported-by-ospfv3/
Types of Areas Supported by Ospfv3. [online]. Available at: <https://gradesfixer.com/free-essay-examples/types-of-areas-supported-by-ospfv3/> [Accessed 19 Apr. 2021].
Types of Areas Supported by Ospfv3 [Internet]. GradesFixer. 2019 Jan 03 [cited 2021 Apr 19]. Available from: https://gradesfixer.com/free-essay-examples/types-of-areas-supported-by-ospfv3/
copy to clipboard

Sorry, copying is not allowed on our website. If you’d like this or any other sample, we’ll happily email it to you.

    By clicking “Send”, you agree to our Terms of service and Privacy statement. We will occasionally send you account related emails.


    Attention! this essay is not unique. You can get 100% plagiarism FREE essay in 30sec

    Recieve 100% plagiarism-Free paper just for 4.99$ on email
    get unique paper
    *Public papers are open and may contain not unique content
    download public sample

    Sorry, we cannot unicalize this essay. You can order Unique paper and our professionals Rewrite it for you



    Your essay sample has been sent.

    Want us to write one just for you? We can custom edit this essay into an original, 100% plagiarism free essay.

    thanks-icon Order now

    Hi there!

    Are you interested in getting a customized paper?

    Check it out!
    Having trouble finding the perfect essay? We’ve got you covered. Hire a writer

    GradesFixer.com uses cookies. By continuing we’ll assume you board with our cookie policy.


    Haven't found the right essay?

    Get an expert to write you the one you need!


    Professional writers and researchers


    Sources and citation are provided


    3 hour delivery