Designing IP Addressing and Selecting Routing Protocols Part 1

Oct 11, 2026 12:48 · 58:10 · English · Whisper Turbo · 7 اسپيڪر
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Hi, hello there.
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Welcome to designing IP addressing and selecting routing protocols.
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This video lecture begins
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with a discussion of the design of an IP address
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or IPB4 addressing scheme.
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It continues with an introduction to IPv6 or
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IPv6 and a discussion of IPv4
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to IPv6 migration strategies.
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Afterwards,
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It describes considerations for selecting the most appropriate network routing
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protocol.
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First,
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routing protocol features are discussed,
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followed by a description of various routing protocols appropriate
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for the enterprise use.
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The video discusses why certain protocols are suitable
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for specific modules in the enterprise architecture.
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It concludes with a description.
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of some advanced routing protocol deployment features,
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including redistribution,
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filtering,
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and summarization.
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Let's get started.
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Designing IP Addressing.
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Designing
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an IP Addressing Plan.
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This section explores private and public address
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types, how to determine the size of the network in relation
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to addressing plan,
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and how to plan an IP addressing hierarchy.
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This section concludes with a discussion of various IP address
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assignment and name resolution methods.
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Prerequisite
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knowledge.
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This includes IPB for address and mask structure,
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IPB for classes and CIDR or the CIDR,
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static addressing,
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dynamic addressing with DHCP,
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DNS,
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private and public addresses.
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the network address translation,
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and the port address translation,
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static network address translation,
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dynamic network address translation,
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and overloading.
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So these are the prerequisite topic prior to designing
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IP addressing.
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Private and public
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IPB4 addresses.
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Recall from the previous video that IPB4
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or IP address space is divided into public and
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private spaces.
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That is for IPv4 and IPv6.
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Private addresses are reserved IP addresses that
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are used to implement within the company's
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network.
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So that is used internally within the organization's
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network, not on the internet.
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Private addresses must therefore be mapped to
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company's external registered addresses when sending anything on
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the internet.
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Public IP addresses are provided for external communication.
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The figure illustrates the use of
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private and public addresses in the network.
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So what are the guidelines for the use of private and public addresses
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in the enterprise network?
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Now as shown here in the figure,
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the typical enterprise network uses both private
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and public IP addresses.
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So private IP addresses are used throughout the enterprise campus.
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Also on the enterprise
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branch and enterprise teleworker modules.
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The following modules include public
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addresses.
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You've got the internet connectivity where
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public IP addresses are used for internet
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connections and publicly accessible servers.
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You also have that on e -commerce module.
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where public IP addresses are used for the database,
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application,
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and web servers.
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The remote access and virtual private network
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or VPN module,
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the enterprise data center module,
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and the one in the metropolitan area network or MAN and
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the site -to -site VPN module,
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where public IP addresses are used for certain connections.
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Network
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size and IP addressing planning.
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So determining the size of the network.
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So the first step in designing an IP addressing plan
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is determining the size of the network
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to establish how many IP subnets and how many IP addresses
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are needed on each subnet.
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So to gather this information.
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we need to answer the following questions here.
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First,
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how many locations does the network consists of?
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The designer must determine the number and type of
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locations.
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Next would be how many devices in each
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location needs addresses.
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The network designer must determine the
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number of devices that need to be addressed,
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including end systems,
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router interfaces,
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switches,
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firewall interfaces,
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and any other devices.
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Next would be,
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what are the IP addressing requirements for individual locations?
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So the designer must collect information about which
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system will use dynamic addressing,
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which will use static addresses,
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and which systems can use private instead of
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public addresses.
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Next would be what subnet size is appropriate.
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Based on the collected information about the number of networks
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and planned switch deployment,
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the designer estimates the appropriate subnet size.
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For example,
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deploying a 48 -port switches would mean that
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subnets with 64 host addresses would be appropriate,
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assuming one device per port.
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Determining the network topology.
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Initially,
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the designer should acquire a general picture of the network topology.
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This will help determine the correct information together about network
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size and its relation to the IP addressing plan.
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With this general network topology information,
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the designer determines the number of locations,
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location types,
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and their correlations.
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The network location information for the topology shown in the figure is
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shown in the table on the next slide.
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So basically,
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this includes the size of individual locations.
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So the network size in terms of the IP addressing
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plan relates to the number of devices and interfaces that needs
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an IP addresses.
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To establish the overall network size
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in a simplistic way,
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The designer determines the appropriate number of workstations,
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servers,
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the IP phones,
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router interfaces,
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switch management,
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and layer 3 interfaces.
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This also includes firewall interfaces or
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the other network devices at each location.
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Now,
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this estimate provides the minimum overall number of IP addresses that
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are needed for the network.
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So the table provides an IP addresses requirements by location
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for the topology shown in the figure from the previous slides.
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So some additional addresses should
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be reserved to allow for seamless potential network growth.
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The commonly suggested reserve is 20 % for the
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main and regional offices and 10 % for
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remote offices.
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However, this can vary from case to case.
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The designers should carefully discuss future network growth with
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the organization's representative to obtain a more precise estimate
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of the required resources.
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Planning the
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IP addressing hierarchy.
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So the IP addressing hierarchy influences network
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routing.
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This section describes IP addressing hierarchy and
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how it reduces routing overhead.
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This section discusses
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the issues that influence the IP addressing plan,
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and the routing protocol choice including summarization,
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fixed length subnet masking or the FLSM,
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variable length subnet masking or the VLSM,
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and a classful and classless routing protocols.
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So benefits of hierarchical addressing.
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So a network designer decides how to implement the
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IP addressing hierarchy based on the network's size,
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geography,
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and topology.
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In a large network,
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hierarchy within the IP addressing plan is mandatory for
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a stable network,
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including stable routing tables.
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For the following reason,
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a planned hierarchical IP addressing structure
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with room for growth is recommended for networks of
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all sizes so this includes influence
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of ip addressing on routing okay
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so an ip addressing plan influences the networks over
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routing.
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Before allocating blocks of IP addresses to various
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parts of the network and assigning IP addresses to devices,
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consider the criteria for an appropriate and effective IP
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addressing scheme.
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So routing stability,
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service availability,
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network scalability,
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and modularity are some of the crucial and preferred network characteristics that
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are directly affected by IP address allocation and
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deployment.
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So the next one would be the modular design and scalable solutions.
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So whether building a new network or adding
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a new service on top of the existing infrastructure,
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a modular design helps to deliver a long
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-term scalable solution.
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So IP addressing modularity allows the aggregation
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of routing information on hierarchical basis.
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Next would be route aggregation.
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So route aggregation is used to reduce the routing overhead and
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improve routing stability and scalability.
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So however,
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to implement route aggregation,
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a designer must be able to divide the network into contiguous
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IP address areas and must have a solid
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understanding of IP address assignment,
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route aggregation,
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and hierarchical routing.
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So also,
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there is a summarization groups.
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So to reduce the routing overhead in a large network,
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a multi -level hierarchy might be required.
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The depth of the hierarchy depends on the network size
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and the size of the highest level summarization group.
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So the figure here shows an example of network
11:48
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
hierarchy.
11:48
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So a typical organization has
11:53
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
up to three levels of the hierarchy.
11:55
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So the first level
11:58
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
The network locations typically represented the first level of the hierarchy
12:02
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
in the enterprise network.
12:03
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So each location is typically represents
12:08
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
a group of summarized subnets known as summarization
12:13
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
group.
12:13
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So the second level,
12:16
S… Speaker 6 (Designing IP Addressing and Selecting Routing Protocols Part 1)
okay,
12:17
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so a second level of hierarchy can be done within the first level
12:21
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
summarization group.
12:22
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
For example,
12:23
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
A large location can be divided into smaller summarization groups that
12:28
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
represents the buildings or cities within that location.
12:32
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Not all first level summarization groups
12:36
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
require a second level of the hierarchy.
12:39
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And you've got
12:43
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
also the third level.
12:44
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So to further minimize the potential routing overhead and instability,
12:49
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
a third level of the hierarchy can exist within the second
12:53
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
level summarization group.
12:55
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So for example,
12:56
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
sections or floors within the individual buildings
13:00
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
can represent the third summarization group.
13:04
S… Speaker 5 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So
13:08
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
route summarization groups.
13:10
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So what are the impact of poorly designed IP addressing?
13:14
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So a poorly designed IP addressing scheme usually
13:19
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
results in IP addresses that are randomly
13:23
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
assigned on as needed basis.
13:27
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
In this case,
13:28
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the IP addresses are most likely dispersed through
13:32
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the network with no thought as to whether they can be grouped
13:37
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
or summarized.
13:38
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
A poor design provides no opportunity for
13:43
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
dividing the network into contiguous areas.
13:46
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
And therefore,
13:49
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
no means of implementing route summarization.
13:51
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now the benefits of route aggregations.
13:56
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Implementing a route aggregation on border routers
14:01
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
between contiguously addressed areas controls the routing
14:05
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
table size.
14:06
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So let's
14:10
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
have an example of the hierarchical IP addressing
14:15
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
and summarization plan.
14:17
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now recall that the number of available
14:21
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
host addresses on a subnet is calculated by the formula
14:25
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
2 raised to H.
14:29
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
okay or any variable minus two okay so where h
14:33
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
is the number of host bits okay so the number of bits set
14:38
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
to zero in the subnet mask so
14:42
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the first two columns in the table shows the location and
14:46
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the number of ip addresses required at each location for
14:51
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the sample network so the third column in this table is
14:55
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the next higher or the next highest power of two from
14:59
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the required
15:00
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
number of addresses this value is used to calculate the
15:04
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
required number of host bits okay and then assuming
15:08
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
that the class b address for instance 172 .16 .0 .0
15:12
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
.16 is used to address this network so you
15:16
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
might have the fifth column okay illustrate sample address blocks
15:20
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
allocated to each location
15:25
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Okay, so basically,
15:28
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
if the San Francisco campus requires 1 ,290,
15:32
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so you won't be getting an exact 1 ,290.
15:35
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So based on our formula,
15:36
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
2 raised to H,
15:37
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
that would yield to 2 ,048.
15:40
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So if you need 441,
15:43
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
that would yield to 512.
15:45
S… Speaker 6 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Okay,
15:46
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
and then if you need 21,
15:48
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so you could get 64 there,
15:51
S… Speaker 7 (Designing IP Addressing and Selecting Routing Protocols Part 1)
of course,
15:51
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
with the consideration of the future growth.
15:57
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
All right, so this is a complete address
16:01
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
block by location for San Francisco campus.
16:05
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So using the 172 .16 .0 .0 address
16:10
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
block, that is a class B network.
16:12
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
And after the careful planning for
16:16
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the redistribution of IP addresses,
16:17
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so we have come up with this assignment of
16:22
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
IP addresses per location.
16:27
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Okay, so there are online tools that you can use to
16:31
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
come up with this type of table.
16:34
S… Speaker 6 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Okay,
16:35
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so you don't have to manually compute the number
16:39
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
of hosts needed and of course the
16:43
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
division of the addresses within the block.
16:46
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
You just have to use that application.
16:48
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
You can go ahead and search that on the internet.
16:50
S… Speaker 5 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Okay,
16:54
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so another example is the hierarchical IP addressing plan.
16:59
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So take note that from the topology that we have,
17:03
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so basically that comprises of the San Francisco campus,
17:08
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the Denver region,
17:09
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
and the Houston region.
17:11
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So summarization point basically is on
17:15
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the edge network.
17:16
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So if it is on the Denver region,
17:19
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so that happens on the router connected to San Francisco campus.
17:23
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So details of routing remain within the area,
17:27
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
simplifying routing tables and reducing processing time.
17:31
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So if you want to know more about this
17:35
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
IP addressing scheme,
17:37
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
you can go ahead and check the videos or
17:42
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the provided videos.
17:44
S… Speaker 6 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Okay.
17:45
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Or the supplementary videos.
17:47
S… Speaker 3 (Designing IP Addressing and Selecting Routing Protocols Part 1)
All right.
17:49
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So next would be.
17:52
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So on the summarization point,
17:54
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
only summarized route,
17:57
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
for instance,
17:57
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
172 .16 .8 .0 .22 is
18:01
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
propagated on the rest of the network.
18:03
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So basically,
18:04
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
it will not propagate addresses
18:08
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
within the block.
18:09
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So it has to be summarized at some point in the network to simplify
18:13
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
and to minimize the use of the resources.
18:16
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So for the main campus,
18:18
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
2 ,048 addresses are allocated.
18:22
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So, 11 host bits are required.
18:24
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now,
18:26
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
this subnet is further divided into smaller subnets supporting
18:30
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
floors or wiring closets.
18:32
S… Speaker 4 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now,
18:33
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
for the Denver region,
18:35
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
1 ,024 addresses are allocated.
18:38
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
10 host bits are required.
18:42
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now,
18:43
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
this address block is further divided into smaller subnets supporting
18:47
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
buildings, floors,
18:48
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
or wiring closets.
18:50
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So that's how you plan distribution of IP addresses within
18:55
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the network.
18:55
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
And similarly,
18:56
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
for the Houston region,
18:59
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so there are about 1 ,024 addresses which
19:04
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
are also allocated and further subdivided as shown
19:08
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
in the table from the previous slide.
19:11
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So on this table here,
19:13
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
you've got Houston.
19:14
S… Speaker 4 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now this
19:18
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
figure illustrates one of the links in the Denver region
19:22
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
going down and how summarization is performed
19:26
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
to reduce the routing update or the traffic generated
19:31
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
by those routing updates.
19:33
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Managing IP
19:38
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
addresses.
19:38
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So there are a lot of ways on how to manage IP
19:43
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
addresses.
19:45
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
includes using DHCP in the enterprise,
19:48
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
using DNS in the enterprise,
19:50
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
and of course,
19:51
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
using the network address translation on the enterprise.
19:54
S… Speaker 4 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now,
19:56
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
using DHCP to assign an IP addresses.
20:00
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
DHCP or dynamic host configuration protocol is used to
20:04
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
provide dynamic IP address allocation to hosts.
20:07
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So DHCP uses a client -server model.
20:10
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
The DHCP server can be Windows Server,
20:14
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
a Unix -based server,
20:16
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
or it could be a Cisco IOS device.
20:18
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So Cisco IOS devices can also be DHCP
20:23
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
relay agents and DHCP clients.
20:27
S… Speaker 4 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now,
20:28
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
using the DNS or the domain name system for name resolution,
20:32
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so to resolve symbolic names to actual network
20:36
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
addresses,
20:37
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
applications use resolver or
20:41
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the name resolver programs,
20:43
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
which are usually part of the host operating system.
20:47
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
An application sends a query.
20:50
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
to a name resolver that resolves the request with either
20:54
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the local database host file or the dns server now
20:59
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
when numerous hosts or names must be resolved to ip
21:03
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
addresses statically defined resolution in hosts are
21:08
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
widely to maintain okay so to
21:12
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
ease this process dns is used for name resolution
21:17
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So DNS is a client -server mechanism used to
21:21
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
access a distributed database providing address -to -name resolution.
21:25
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So a DNS server is a special software
21:30
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
that usually resides on a dedicated hardware.
21:33
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So DNS servers are organized in hierarchical
21:37
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
structure.
21:37
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
A DNS server can query other DNS servers to
21:42
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
retrieve partial resolutions for a certain name,
21:45
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
for example.
21:46
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
One DNS server could resolve say Cisco .com
21:50
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
and another could resolve www.
21:53
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So next would be the
21:58
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
use of the network address translation or not.
22:00
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
This is a process in which one or more local
22:04
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
IP addresses is translated into one or more global
22:09
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
IP addresses and vice versa in order to provide
22:13
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
internet access to the local hosts.
22:19
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now recommended practices for IP address assignment.
22:23
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So we have the method here is either you assigned
22:27
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
it statically or you assigned it dynamically.
22:31
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So strategic address assignment.
22:34
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So infrastructure devices such as routers and switches should
22:39
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
be given a static IP assignment.
22:41
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now for the HCP,
22:45
S… Speaker 7 (Designing IP Addressing and Selecting Routing Protocols Part 1)
of course,
22:46
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
the end user devices.
22:48
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Just like,
22:49
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
for instance, if you are providing a free Wi -Fi access to the end users,
22:53
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
so we could put it in a DHCP
22:57
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
or dynamic assignment.
22:58
S… Speaker 3 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Okay.
22:59
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now,
23:00
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
number of end user devices.
23:02
S… Speaker 4 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So,
23:03
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
well, for static,
23:04
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
it could be up to 30 end user devices.
23:07
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So, if it is more than 30,
23:09
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
then it is recommended to use DHCP.
23:12
S… Speaker 3 (Designing IP Addressing and Selecting Routing Protocols Part 1)
So,
23:13
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
it's very hard to manually assign an IP address on multiple devices.
23:19
S… Speaker 4 (Designing IP Addressing and Selecting Routing Protocols Part 1)
Now,
23:19
S… Speaker 1 (Designing IP Addressing and Selecting Routing Protocols Part 1)
renumbering criteria requires manual reconfiguration
23:24
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for all the hosts.
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Whereas for DHCP,
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only DHCP server reconfiguration is needed.
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So address tracking,
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so it's easy address tracking for the static.
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Whereas for dynamic,
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it requires additional DHCP server configuration.
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Now,
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additional parameters,
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manual configurations of all hosts are required.
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Now, for DHCP,
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only DHCP server needs to be configured.
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Now,
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for high availability,
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IP addresses are available at any time.
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For DHCP,
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so redundant DHCP server is required.
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Now,
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for security concerns,
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well,
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we've got minor security risk for the static assignment.
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And then for...
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Dynamic.
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So any device gets an IP address.
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All right.
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Okay.
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So let's have an IP assignment or IP address assignment
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methods in an enterprise network.
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So what are the guidelines for assigning
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IP addresses in the enterprise network?
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So the typical enterprise network uses both static and
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dynamic addresses assignment methods.
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So as shown here in the figure.
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The static IP address assignment method is typically used for
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campus network infrastructure.
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Okay.
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And in all the modules.
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of the enterprise edge,
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the e -commerce,
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the internet connectivity,
25:04
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the remote access and VPN,
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and the one -end man and site -to -site VPN modules.
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Now,
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static addresses are required for systems such as server or network
25:14
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devices in which the IP address must be known at all times
25:19
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for connectivity.
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So general access or management.
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So whenever you assign an IP address to the server or router interfaces
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or switches,

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