SlideShare a Scribd company logo
1 of 26
Download to read offline
© 2008 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 1
Chapter 9: Subnetting
IP Networks
Introduction to Networking
Presentation_ID 2© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Chapter 9
9.1 Subnetting an IPv4 Network
9.2 Addressing Schemes
9.3 Design Considerations for IPv6
9.4 Summary
Presentation_ID 3© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Chapter 9: Objectives
 Explain why routing is necessary for hosts on different
networks to communicate.
 Describe IP as a communication protocol used to identify a
single device on a network.
 Given a network and a subnet mask, calculate the number of
host addresses available.
 Calculate the necessary subnet mask in order to
accommodate the requirements of a network.
 Describe the benefits of variable length subnet masking
(VLSM)
 Explain how IPv6 address assignments are implemented in a
business network.
Presentation_ID 4© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Network Segmentation
Reasons for Subnetting
Large networks need to be segmented into smaller sub-networks,
creating smaller groups of devices and services in order to:
 Control traffic by containing broadcast traffic within subnetwork
 Reduce overall network traffic and improve network performance
Subnetting - process of segmenting a network into multiple smaller
network spaces called subnetworks or Subnets.
Communication Between Subnets
 A router is necessary for devices on different networks and subnets
to communicate.
 Each router interface must have an IPv4 host address that belongs to
the network or subnet that the router interface is connected to.
 Devices on a network and subnet use the router interface attached to
their LAN as their default gateway.
Presentation_ID 5© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv4 Network
IP Subnetting is FUNdamental
Presentation_ID 6© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv4 Network
Basic Subnetting
 Borrowing Bits to Create Subnets
 Borrowing 1 bit 21 = 2 subnets
Subnet 1
Network 192.168.1.128-255/25
Mask: 255.255.255.128
Subnet 0
Network 192.168.1.0-127/25
Mask: 255.255.255.128
Borrowing 1 Bit from the host portion creates 2 subnets with the same subnet mask
Presentation_ID 7© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv4 Network
Subnets in Use
Subnet 0
Network 192.168.1.0-127/25
Subnet 1
Network 192.168.1.128-255/25
Presentation_ID 8© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv4 Network
Subnetting Formulas
Calculate Number of Subnets
Calculate Number of Hosts
Presentation_ID 9© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv4 Network
Creating 4 Subnets
Borrowing 2 bits to create 4 subnets. 22 = 4 subnets
Presentation_ID 10© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv4 Network
Creating 8 Subnets
Borrowing 3 bits to Create 8 Subnets. 23 = 8 subnets
Presentation_ID 11© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv4 Network
Creating 8 Subnets(continued)
Presentation_ID 12© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Determining the Subnet Mask
Subnetting Based on Host Requirements
There are two considerations when planning subnets:
 Number of Subnets required
 Number of Host addresses required
Formula to determine number of useable hosts
2^n-2
2^n (where n is the number the number of host bits remaining) is
used to calculate the number of hosts
-2 Subnetwork ID and broadcast address cannot be used on each
subnet
Presentation_ID 13© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Determining the Subnet Mask
Subnetting Network-Based Requirements
Calculate number of subnets
Formula 2^n (where n is the number of bits borrowed)
Subnet needed for
each department in
graphic
Presentation_ID 14© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Determining the Subnet Mask
Subnetting To Meet Network Requirements
It is important to balance the number of subnets needed
and the number of hosts required for the largest subnet.
 Design the addressing scheme to accommodate the
maximum number of hosts for each subnet.
Allow for growth in
each subnet.
Presentation_ID 15© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Determining the Subnet Mask
Subnetting To Meet Network Requirements (cont)
Presentation_ID 16© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Benefits of Variable Length Subnet Masking
Traditional Subnetting Wastes Addresses
Traditional subnetting - same number of addresses is
allocated for each subnet.
Subnets that require fewer addresses have unused
(wasted) addresses. For example, WAN links only need 2
addresses.
Variable Length Subnet Mask (VLSM) or subnetting a
subnet provides more efficient use of addresses.
Presentation_ID 17© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Benefits of Variable Length Subnet Masking
Variable Length Subnet Masks (VLSM)
VLSM allows a network space to be divided in unequal
parts.
Subnet mask will vary depending on how many bits have
been borrowed for a particular subnet.
Network is first subnetted, and then the subnets are
subnetted again.
Process repeated as necessary to create subnets of
various sizes.
Presentation_ID 18© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Benefits of Variable Length Subnet Masking
Basic VLSM
Presentation_ID 19© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Benefits of Variable Length Subnet Masking
VLSM in Practice
Using VLSM subnets, the LAN and WAN segments in
example below can be addressed with minimum waste.
 Each LANs will be assigned a subnet with /27 mask.
Each WAN link will be assigned a subnet with /30 mask.
Presentation_ID 20© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Benefits of Variable Length Subnet Masking
VLSM Chart
Presentation_ID 21© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Structured Design
Planning to Address the Network
Allocation of network addresses should be planned and
documented for the purposes of:
Preventing duplication of addresses
Providing and controlling access
Monitoring security and performance
Addresses for Clients - usually dynamically assigned using
Dynamic Host Configuration Protocol (DHCP)
Sample Network
Addressing Plan
Presentation_ID 22© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv6 Network
Subnetting Using the Subnet ID
An IPv6 Network Space is subnetted to support
hierarchical, logical design of the network
Presentation_ID 23© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv6 Network
IPV6 Subnet Allocation
Presentation_ID 24© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Subnetting an IPv6 Network
Subnetting into the Interface ID
IPv6 bits can be borrowed from the interface ID to create
additional IPv6 subnets
Presentation_ID 25© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Chapter 9: Summary
 Process of segmenting a network, by dividing it into to
multiple smaller network spaces, is called subnetting.
 Subnetting a subnet, or using Variable Length Subnet
Mask (VLSM) was designed to avoid wasting addresses.
 IPv6 address space is a huge address space so it is
subnetted to support the hierarchical, logical design of
the network not to conserve addresses.
 Size, location, use, and access requirements are all
considerations in the address planning process.
 IP networks need to be tested to verify connectivity and
operational performance.
Presentation_ID 26© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

More Related Content

What's hot

CCNA 1 Routing and Switching v5.0 Chapter 2
CCNA 1 Routing and Switching v5.0 Chapter 2CCNA 1 Routing and Switching v5.0 Chapter 2
CCNA 1 Routing and Switching v5.0 Chapter 2Nil Menon
 
CCNAv5 - S4: Chapter8 monitoring the network
CCNAv5 - S4: Chapter8 monitoring the networkCCNAv5 - S4: Chapter8 monitoring the network
CCNAv5 - S4: Chapter8 monitoring the networkVuz Dở Hơi
 
CCNA 1 Routing and Switching v5.0 Chapter 1
CCNA 1 Routing and Switching v5.0 Chapter 1CCNA 1 Routing and Switching v5.0 Chapter 1
CCNA 1 Routing and Switching v5.0 Chapter 1Nil Menon
 
CCNA RS_NB - Chapter 6
CCNA RS_NB - Chapter 6CCNA RS_NB - Chapter 6
CCNA RS_NB - Chapter 6Irsandi Hasan
 
CCNA RS_NB - Chapter 11
CCNA RS_NB - Chapter 11CCNA RS_NB - Chapter 11
CCNA RS_NB - Chapter 11Irsandi Hasan
 
Ccna v5-S1-Chapter 10
Ccna v5-S1-Chapter 10Ccna v5-S1-Chapter 10
Ccna v5-S1-Chapter 10Hamza Malik
 
CCNA RS_NB - Chapter 5
CCNA RS_NB - Chapter 5CCNA RS_NB - Chapter 5
CCNA RS_NB - Chapter 5Irsandi Hasan
 
CCNA 1 Routing and Switching v5.0 Chapter 8
CCNA 1 Routing and Switching v5.0 Chapter 8CCNA 1 Routing and Switching v5.0 Chapter 8
CCNA 1 Routing and Switching v5.0 Chapter 8Nil Menon
 
Chapter 01 - Exploring the Network
Chapter 01 -  Exploring the NetworkChapter 01 -  Exploring the Network
Chapter 01 - Exploring the NetworkYaser Rahmati
 
CCNA RS_ITN - Chapter 3
CCNA RS_ITN - Chapter 3CCNA RS_ITN - Chapter 3
CCNA RS_ITN - Chapter 3Irsandi Hasan
 
CCNA RS_ITN - Chapter 9
CCNA RS_ITN - Chapter 9CCNA RS_ITN - Chapter 9
CCNA RS_ITN - Chapter 9Irsandi Hasan
 
CCNA 1 Routing and Switching v5.0 Chapter 9
CCNA 1 Routing and Switching v5.0 Chapter 9CCNA 1 Routing and Switching v5.0 Chapter 9
CCNA 1 Routing and Switching v5.0 Chapter 9Nil Menon
 
CCNAv5 - S1: Chapter 1 Exploring The Network
CCNAv5 - S1: Chapter 1 Exploring The NetworkCCNAv5 - S1: Chapter 1 Exploring The Network
CCNAv5 - S1: Chapter 1 Exploring The NetworkVuz Dở Hơi
 
CCNA RS_ITN - Chapter 4
CCNA RS_ITN - Chapter 4CCNA RS_ITN - Chapter 4
CCNA RS_ITN - Chapter 4Irsandi Hasan
 
Ccna r&s overview presentation
Ccna r&s overview presentationCcna r&s overview presentation
Ccna r&s overview presentationpersonal
 
CCNA 1 Routing and Switching v5.0 Chapter 3
CCNA 1 Routing and Switching v5.0 Chapter 3CCNA 1 Routing and Switching v5.0 Chapter 3
CCNA 1 Routing and Switching v5.0 Chapter 3Nil Menon
 
CCNAv5 - S4: Chapter3 Point to-point Connections
CCNAv5 - S4: Chapter3 Point to-point ConnectionsCCNAv5 - S4: Chapter3 Point to-point Connections
CCNAv5 - S4: Chapter3 Point to-point ConnectionsVuz Dở Hơi
 
CCNAv5 - S2: Chapter1 Introsuction to switched networks
CCNAv5 - S2: Chapter1 Introsuction to switched networksCCNAv5 - S2: Chapter1 Introsuction to switched networks
CCNAv5 - S2: Chapter1 Introsuction to switched networksVuz Dở Hơi
 
CCNA RS_ITN - Chapter 2
CCNA RS_ITN - Chapter 2CCNA RS_ITN - Chapter 2
CCNA RS_ITN - Chapter 2Irsandi Hasan
 

What's hot (19)

CCNA 1 Routing and Switching v5.0 Chapter 2
CCNA 1 Routing and Switching v5.0 Chapter 2CCNA 1 Routing and Switching v5.0 Chapter 2
CCNA 1 Routing and Switching v5.0 Chapter 2
 
CCNAv5 - S4: Chapter8 monitoring the network
CCNAv5 - S4: Chapter8 monitoring the networkCCNAv5 - S4: Chapter8 monitoring the network
CCNAv5 - S4: Chapter8 monitoring the network
 
CCNA 1 Routing and Switching v5.0 Chapter 1
CCNA 1 Routing and Switching v5.0 Chapter 1CCNA 1 Routing and Switching v5.0 Chapter 1
CCNA 1 Routing and Switching v5.0 Chapter 1
 
CCNA RS_NB - Chapter 6
CCNA RS_NB - Chapter 6CCNA RS_NB - Chapter 6
CCNA RS_NB - Chapter 6
 
CCNA RS_NB - Chapter 11
CCNA RS_NB - Chapter 11CCNA RS_NB - Chapter 11
CCNA RS_NB - Chapter 11
 
Ccna v5-S1-Chapter 10
Ccna v5-S1-Chapter 10Ccna v5-S1-Chapter 10
Ccna v5-S1-Chapter 10
 
CCNA RS_NB - Chapter 5
CCNA RS_NB - Chapter 5CCNA RS_NB - Chapter 5
CCNA RS_NB - Chapter 5
 
CCNA 1 Routing and Switching v5.0 Chapter 8
CCNA 1 Routing and Switching v5.0 Chapter 8CCNA 1 Routing and Switching v5.0 Chapter 8
CCNA 1 Routing and Switching v5.0 Chapter 8
 
Chapter 01 - Exploring the Network
Chapter 01 -  Exploring the NetworkChapter 01 -  Exploring the Network
Chapter 01 - Exploring the Network
 
CCNA RS_ITN - Chapter 3
CCNA RS_ITN - Chapter 3CCNA RS_ITN - Chapter 3
CCNA RS_ITN - Chapter 3
 
CCNA RS_ITN - Chapter 9
CCNA RS_ITN - Chapter 9CCNA RS_ITN - Chapter 9
CCNA RS_ITN - Chapter 9
 
CCNA 1 Routing and Switching v5.0 Chapter 9
CCNA 1 Routing and Switching v5.0 Chapter 9CCNA 1 Routing and Switching v5.0 Chapter 9
CCNA 1 Routing and Switching v5.0 Chapter 9
 
CCNAv5 - S1: Chapter 1 Exploring The Network
CCNAv5 - S1: Chapter 1 Exploring The NetworkCCNAv5 - S1: Chapter 1 Exploring The Network
CCNAv5 - S1: Chapter 1 Exploring The Network
 
CCNA RS_ITN - Chapter 4
CCNA RS_ITN - Chapter 4CCNA RS_ITN - Chapter 4
CCNA RS_ITN - Chapter 4
 
Ccna r&s overview presentation
Ccna r&s overview presentationCcna r&s overview presentation
Ccna r&s overview presentation
 
CCNA 1 Routing and Switching v5.0 Chapter 3
CCNA 1 Routing and Switching v5.0 Chapter 3CCNA 1 Routing and Switching v5.0 Chapter 3
CCNA 1 Routing and Switching v5.0 Chapter 3
 
CCNAv5 - S4: Chapter3 Point to-point Connections
CCNAv5 - S4: Chapter3 Point to-point ConnectionsCCNAv5 - S4: Chapter3 Point to-point Connections
CCNAv5 - S4: Chapter3 Point to-point Connections
 
CCNAv5 - S2: Chapter1 Introsuction to switched networks
CCNAv5 - S2: Chapter1 Introsuction to switched networksCCNAv5 - S2: Chapter1 Introsuction to switched networks
CCNAv5 - S2: Chapter1 Introsuction to switched networks
 
CCNA RS_ITN - Chapter 2
CCNA RS_ITN - Chapter 2CCNA RS_ITN - Chapter 2
CCNA RS_ITN - Chapter 2
 

Viewers also liked

Ccna v5-S1-Chapter 11
Ccna v5-S1-Chapter 11Ccna v5-S1-Chapter 11
Ccna v5-S1-Chapter 11Hamza Malik
 
Ccna v5-S1-Chapter 8
Ccna v5-S1-Chapter 8Ccna v5-S1-Chapter 8
Ccna v5-S1-Chapter 8Hamza Malik
 
Ccna v5-S1-Chapter 3
Ccna v5-S1-Chapter 3Ccna v5-S1-Chapter 3
Ccna v5-S1-Chapter 3Hamza Malik
 
Ccna v5-S1-Chapter 2
Ccna v5-S1-Chapter 2Ccna v5-S1-Chapter 2
Ccna v5-S1-Chapter 2Hamza Malik
 
Ccna v5-S1-Chapter 1
Ccna v5-S1-Chapter 1Ccna v5-S1-Chapter 1
Ccna v5-S1-Chapter 1Hamza Malik
 
CCNAv5 - S4: Chapter 9 troubleshooting the network
CCNAv5 - S4: Chapter 9 troubleshooting the networkCCNAv5 - S4: Chapter 9 troubleshooting the network
CCNAv5 - S4: Chapter 9 troubleshooting the networkVuz Dở Hơi
 
CCNA Advanced Routing Protocols
CCNA Advanced Routing ProtocolsCCNA Advanced Routing Protocols
CCNA Advanced Routing ProtocolsDsunte Wilson
 
CCNA Routing Protocols
CCNA Routing ProtocolsCCNA Routing Protocols
CCNA Routing ProtocolsDsunte Wilson
 
CCNA Introducing Networks
CCNA Introducing NetworksCCNA Introducing Networks
CCNA Introducing NetworksDsunte Wilson
 
CCNA Basic Switching and Switch Configuration
CCNA Basic Switching and Switch ConfigurationCCNA Basic Switching and Switch Configuration
CCNA Basic Switching and Switch ConfigurationDsunte Wilson
 
Lesson.7: Configuring IP Routing B
Lesson.7: Configuring IP Routing BLesson.7: Configuring IP Routing B
Lesson.7: Configuring IP Routing BMahmmoud Mahdi
 
Lesson 4: Network Infrastucture
Lesson 4: Network InfrastuctureLesson 4: Network Infrastucture
Lesson 4: Network InfrastuctureMahmmoud Mahdi
 
Lesson 9: Managing Files
Lesson 9: Managing FilesLesson 9: Managing Files
Lesson 9: Managing FilesMahmmoud Mahdi
 
Lesson1: Introduction To Networking Concepts
Lesson1: Introduction To Networking ConceptsLesson1: Introduction To Networking Concepts
Lesson1: Introduction To Networking ConceptsMahmmoud Mahdi
 

Viewers also liked (20)

Ccna v5-S1-Chapter 11
Ccna v5-S1-Chapter 11Ccna v5-S1-Chapter 11
Ccna v5-S1-Chapter 11
 
Ccna v5-S1-Chapter 8
Ccna v5-S1-Chapter 8Ccna v5-S1-Chapter 8
Ccna v5-S1-Chapter 8
 
Ccna v5-S1-Chapter 3
Ccna v5-S1-Chapter 3Ccna v5-S1-Chapter 3
Ccna v5-S1-Chapter 3
 
Ccna v5-S1-Chapter 2
Ccna v5-S1-Chapter 2Ccna v5-S1-Chapter 2
Ccna v5-S1-Chapter 2
 
Ccna v5-S1-Chapter 1
Ccna v5-S1-Chapter 1Ccna v5-S1-Chapter 1
Ccna v5-S1-Chapter 1
 
CCNA IP Addressing
CCNA IP AddressingCCNA IP Addressing
CCNA IP Addressing
 
CCNAv5 - S4: Chapter 9 troubleshooting the network
CCNAv5 - S4: Chapter 9 troubleshooting the networkCCNAv5 - S4: Chapter 9 troubleshooting the network
CCNAv5 - S4: Chapter 9 troubleshooting the network
 
CCNA TCP/IP
CCNA TCP/IPCCNA TCP/IP
CCNA TCP/IP
 
CCNA Advanced Routing Protocols
CCNA Advanced Routing ProtocolsCCNA Advanced Routing Protocols
CCNA Advanced Routing Protocols
 
CCNA Routing Protocols
CCNA Routing ProtocolsCCNA Routing Protocols
CCNA Routing Protocols
 
CCNA Introducing Networks
CCNA Introducing NetworksCCNA Introducing Networks
CCNA Introducing Networks
 
CCNA Basic Switching and Switch Configuration
CCNA Basic Switching and Switch ConfigurationCCNA Basic Switching and Switch Configuration
CCNA Basic Switching and Switch Configuration
 
Exploration network chapter6
Exploration network chapter6Exploration network chapter6
Exploration network chapter6
 
Ite pc v40_chapter9
Ite pc v40_chapter9Ite pc v40_chapter9
Ite pc v40_chapter9
 
Lesson.7: Configuring IP Routing B
Lesson.7: Configuring IP Routing BLesson.7: Configuring IP Routing B
Lesson.7: Configuring IP Routing B
 
IP Subnetting
IP SubnettingIP Subnetting
IP Subnetting
 
Lesson 4: Network Infrastucture
Lesson 4: Network InfrastuctureLesson 4: Network Infrastucture
Lesson 4: Network Infrastucture
 
Lesson 9: Managing Files
Lesson 9: Managing FilesLesson 9: Managing Files
Lesson 9: Managing Files
 
Assignment
AssignmentAssignment
Assignment
 
Lesson1: Introduction To Networking Concepts
Lesson1: Introduction To Networking ConceptsLesson1: Introduction To Networking Concepts
Lesson1: Introduction To Networking Concepts
 

Similar to Ccna v5-S1-Chapter 9

Chapter 9 : Subnetting IP networks
Chapter 9 : Subnetting IP networksChapter 9 : Subnetting IP networks
Chapter 9 : Subnetting IP networksteknetir
 
CCNAv5 - S1: Chapter 9 - Subnetting Ip Networks
CCNAv5 - S1: Chapter 9 - Subnetting Ip NetworksCCNAv5 - S1: Chapter 9 - Subnetting Ip Networks
CCNAv5 - S1: Chapter 9 - Subnetting Ip NetworksVuz Dở Hơi
 
Chapter 09 - Subnetting IP Networks
Chapter 09 - Subnetting IP NetworksChapter 09 - Subnetting IP Networks
Chapter 09 - Subnetting IP NetworksYaser Rahmati
 
CCNA RS_NB - Chapter 8
CCNA RS_NB - Chapter 8CCNA RS_NB - Chapter 8
CCNA RS_NB - Chapter 8Irsandi Hasan
 
CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8
CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8
CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8Waqas Ahmed Nawaz
 
08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdf08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdfRobinRohit2
 
08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdf08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdfPilarAlulema2
 
Week5 f2017(1)
Week5 f2017(1)Week5 f2017(1)
Week5 f2017(1)trayyoo
 
CCNA Discovery 3 - Chapter 4
CCNA Discovery 3 - Chapter 4CCNA Discovery 3 - Chapter 4
CCNA Discovery 3 - Chapter 4Irsandi Hasan
 
CCNAv5 - S3: Chapter1 Introduction to Scaling Networks
CCNAv5 - S3: Chapter1 Introduction to Scaling NetworksCCNAv5 - S3: Chapter1 Introduction to Scaling Networks
CCNAv5 - S3: Chapter1 Introduction to Scaling NetworksVuz Dở Hơi
 
Sca n instructorppt_chapter1_final
Sca n instructorppt_chapter1_finalSca n instructorppt_chapter1_final
Sca n instructorppt_chapter1_finalCamTESOL2015
 
CCNA RS_NB - Chapter 7
CCNA RS_NB - Chapter 7CCNA RS_NB - Chapter 7
CCNA RS_NB - Chapter 7Irsandi Hasan
 
CCNA Discovery 2 - Chapter 4
CCNA Discovery 2 - Chapter 4CCNA Discovery 2 - Chapter 4
CCNA Discovery 2 - Chapter 4Irsandi Hasan
 
CCNAv5 - S4: Chapter2 Connecting To The Wan
CCNAv5 - S4: Chapter2 Connecting To The WanCCNAv5 - S4: Chapter2 Connecting To The Wan
CCNAv5 - S4: Chapter2 Connecting To The WanVuz Dở Hơi
 
Exploration routing chapter_6
Exploration routing chapter_6Exploration routing chapter_6
Exploration routing chapter_6Joshua Torres
 
Chapter 08 - IP Addressing
Chapter 08 - IP AddressingChapter 08 - IP Addressing
Chapter 08 - IP AddressingYaser Rahmati
 
CCNAv5 - S1: Chapter 8 - Ip Addressing
CCNAv5 - S1: Chapter 8 - Ip AddressingCCNAv5 - S1: Chapter 8 - Ip Addressing
CCNAv5 - S1: Chapter 8 - Ip AddressingVuz Dở Hơi
 
Chapter 8 : IP addressing
Chapter 8 : IP addressingChapter 8 : IP addressing
Chapter 8 : IP addressingteknetir
 

Similar to Ccna v5-S1-Chapter 9 (20)

Chapter 9 : Subnetting IP networks
Chapter 9 : Subnetting IP networksChapter 9 : Subnetting IP networks
Chapter 9 : Subnetting IP networks
 
CCNAv5 - S1: Chapter 9 - Subnetting Ip Networks
CCNAv5 - S1: Chapter 9 - Subnetting Ip NetworksCCNAv5 - S1: Chapter 9 - Subnetting Ip Networks
CCNAv5 - S1: Chapter 9 - Subnetting Ip Networks
 
Chapter 09 - Subnetting IP Networks
Chapter 09 - Subnetting IP NetworksChapter 09 - Subnetting IP Networks
Chapter 09 - Subnetting IP Networks
 
Subnetting
SubnettingSubnetting
Subnetting
 
CCNA RS_NB - Chapter 8
CCNA RS_NB - Chapter 8CCNA RS_NB - Chapter 8
CCNA RS_NB - Chapter 8
 
CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8
CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8
CCNA (R & S) Module 01 - Introduction to Networks - Chapter 8
 
08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdf08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdf
 
08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdf08_Subnetting_IP_Networks.pdf
08_Subnetting_IP_Networks.pdf
 
Week5 f2017(1)
Week5 f2017(1)Week5 f2017(1)
Week5 f2017(1)
 
CCNA Discovery 3 - Chapter 4
CCNA Discovery 3 - Chapter 4CCNA Discovery 3 - Chapter 4
CCNA Discovery 3 - Chapter 4
 
CCNAv5 - S3: Chapter1 Introduction to Scaling Networks
CCNAv5 - S3: Chapter1 Introduction to Scaling NetworksCCNAv5 - S3: Chapter1 Introduction to Scaling Networks
CCNAv5 - S3: Chapter1 Introduction to Scaling Networks
 
Sca n instructorppt_chapter1_final
Sca n instructorppt_chapter1_finalSca n instructorppt_chapter1_final
Sca n instructorppt_chapter1_final
 
CCNA RS_NB - Chapter 7
CCNA RS_NB - Chapter 7CCNA RS_NB - Chapter 7
CCNA RS_NB - Chapter 7
 
CCNA Discovery 2 - Chapter 4
CCNA Discovery 2 - Chapter 4CCNA Discovery 2 - Chapter 4
CCNA Discovery 2 - Chapter 4
 
CCNAv5 - S4: Chapter2 Connecting To The Wan
CCNAv5 - S4: Chapter2 Connecting To The WanCCNAv5 - S4: Chapter2 Connecting To The Wan
CCNAv5 - S4: Chapter2 Connecting To The Wan
 
Exploration routing chapter_6
Exploration routing chapter_6Exploration routing chapter_6
Exploration routing chapter_6
 
Chapter 08 - IP Addressing
Chapter 08 - IP AddressingChapter 08 - IP Addressing
Chapter 08 - IP Addressing
 
CCNAv5 - S1: Chapter 8 - Ip Addressing
CCNAv5 - S1: Chapter 8 - Ip AddressingCCNAv5 - S1: Chapter 8 - Ip Addressing
CCNAv5 - S1: Chapter 8 - Ip Addressing
 
Chapter 8 : IP addressing
Chapter 8 : IP addressingChapter 8 : IP addressing
Chapter 8 : IP addressing
 
CCNA Icnd110 s04l03
CCNA Icnd110 s04l03CCNA Icnd110 s04l03
CCNA Icnd110 s04l03
 

Recently uploaded

Decoding the Tweet _ Practical Criticism in the Age of Hashtag.pptx
Decoding the Tweet _ Practical Criticism in the Age of Hashtag.pptxDecoding the Tweet _ Practical Criticism in the Age of Hashtag.pptx
Decoding the Tweet _ Practical Criticism in the Age of Hashtag.pptxDhatriParmar
 
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...Nguyen Thanh Tu Collection
 
CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptxCLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptxAnupam32727
 
Grade Three -ELLNA-REVIEWER-ENGLISH.pptx
Grade Three -ELLNA-REVIEWER-ENGLISH.pptxGrade Three -ELLNA-REVIEWER-ENGLISH.pptx
Grade Three -ELLNA-REVIEWER-ENGLISH.pptxkarenfajardo43
 
Sulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their usesSulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their usesVijayaLaxmi84
 
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...Nguyen Thanh Tu Collection
 
DiskStorage_BasicFileStructuresandHashing.pdf
DiskStorage_BasicFileStructuresandHashing.pdfDiskStorage_BasicFileStructuresandHashing.pdf
DiskStorage_BasicFileStructuresandHashing.pdfChristalin Nelson
 
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITWQ-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITWQuiz Club NITW
 
ICS 2208 Lecture Slide Notes for Topic 6
ICS 2208 Lecture Slide Notes for Topic 6ICS 2208 Lecture Slide Notes for Topic 6
ICS 2208 Lecture Slide Notes for Topic 6Vanessa Camilleri
 
Comparative Literature in India by Amiya dev.pptx
Comparative Literature in India by Amiya dev.pptxComparative Literature in India by Amiya dev.pptx
Comparative Literature in India by Amiya dev.pptxAvaniJani1
 
How to Uninstall a Module in Odoo 17 Using Command Line
How to Uninstall a Module in Odoo 17 Using Command LineHow to Uninstall a Module in Odoo 17 Using Command Line
How to Uninstall a Module in Odoo 17 Using Command LineCeline George
 
Scientific Writing :Research Discourse
Scientific  Writing :Research  DiscourseScientific  Writing :Research  Discourse
Scientific Writing :Research DiscourseAnita GoswamiGiri
 
Unraveling Hypertext_ Analyzing Postmodern Elements in Literature.pptx
Unraveling Hypertext_ Analyzing  Postmodern Elements in  Literature.pptxUnraveling Hypertext_ Analyzing  Postmodern Elements in  Literature.pptx
Unraveling Hypertext_ Analyzing Postmodern Elements in Literature.pptxDhatriParmar
 
PART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFE
PART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFEPART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFE
PART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFEMISSRITIMABIOLOGYEXP
 
The role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenshipThe role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenshipKarl Donert
 
6 ways Samsung’s Interactive Display powered by Android changes the classroom
6 ways Samsung’s Interactive Display powered by Android changes the classroom6 ways Samsung’s Interactive Display powered by Android changes the classroom
6 ways Samsung’s Interactive Display powered by Android changes the classroomSamsung Business USA
 
Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...
Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...
Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...HetalPathak10
 
Tree View Decoration Attribute in the Odoo 17
Tree View Decoration Attribute in the Odoo 17Tree View Decoration Attribute in the Odoo 17
Tree View Decoration Attribute in the Odoo 17Celine George
 

Recently uploaded (20)

prashanth updated resume 2024 for Teaching Profession
prashanth updated resume 2024 for Teaching Professionprashanth updated resume 2024 for Teaching Profession
prashanth updated resume 2024 for Teaching Profession
 
Decoding the Tweet _ Practical Criticism in the Age of Hashtag.pptx
Decoding the Tweet _ Practical Criticism in the Age of Hashtag.pptxDecoding the Tweet _ Practical Criticism in the Age of Hashtag.pptx
Decoding the Tweet _ Practical Criticism in the Age of Hashtag.pptx
 
Introduction to Research ,Need for research, Need for design of Experiments, ...
Introduction to Research ,Need for research, Need for design of Experiments, ...Introduction to Research ,Need for research, Need for design of Experiments, ...
Introduction to Research ,Need for research, Need for design of Experiments, ...
 
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
CHUYÊN ĐỀ ÔN THEO CÂU CHO HỌC SINH LỚP 12 ĐỂ ĐẠT ĐIỂM 5+ THI TỐT NGHIỆP THPT ...
 
CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptxCLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
 
Grade Three -ELLNA-REVIEWER-ENGLISH.pptx
Grade Three -ELLNA-REVIEWER-ENGLISH.pptxGrade Three -ELLNA-REVIEWER-ENGLISH.pptx
Grade Three -ELLNA-REVIEWER-ENGLISH.pptx
 
Sulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their usesSulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their uses
 
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...
 
DiskStorage_BasicFileStructuresandHashing.pdf
DiskStorage_BasicFileStructuresandHashing.pdfDiskStorage_BasicFileStructuresandHashing.pdf
DiskStorage_BasicFileStructuresandHashing.pdf
 
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITWQ-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW
 
ICS 2208 Lecture Slide Notes for Topic 6
ICS 2208 Lecture Slide Notes for Topic 6ICS 2208 Lecture Slide Notes for Topic 6
ICS 2208 Lecture Slide Notes for Topic 6
 
Comparative Literature in India by Amiya dev.pptx
Comparative Literature in India by Amiya dev.pptxComparative Literature in India by Amiya dev.pptx
Comparative Literature in India by Amiya dev.pptx
 
How to Uninstall a Module in Odoo 17 Using Command Line
How to Uninstall a Module in Odoo 17 Using Command LineHow to Uninstall a Module in Odoo 17 Using Command Line
How to Uninstall a Module in Odoo 17 Using Command Line
 
Scientific Writing :Research Discourse
Scientific  Writing :Research  DiscourseScientific  Writing :Research  Discourse
Scientific Writing :Research Discourse
 
Unraveling Hypertext_ Analyzing Postmodern Elements in Literature.pptx
Unraveling Hypertext_ Analyzing  Postmodern Elements in  Literature.pptxUnraveling Hypertext_ Analyzing  Postmodern Elements in  Literature.pptx
Unraveling Hypertext_ Analyzing Postmodern Elements in Literature.pptx
 
PART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFE
PART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFEPART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFE
PART 1 - CHAPTER 1 - CELL THE FUNDAMENTAL UNIT OF LIFE
 
The role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenshipThe role of Geography in climate education: science and active citizenship
The role of Geography in climate education: science and active citizenship
 
6 ways Samsung’s Interactive Display powered by Android changes the classroom
6 ways Samsung’s Interactive Display powered by Android changes the classroom6 ways Samsung’s Interactive Display powered by Android changes the classroom
6 ways Samsung’s Interactive Display powered by Android changes the classroom
 
Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...
Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...
Satirical Depths - A Study of Gabriel Okara's Poem - 'You Laughed and Laughed...
 
Tree View Decoration Attribute in the Odoo 17
Tree View Decoration Attribute in the Odoo 17Tree View Decoration Attribute in the Odoo 17
Tree View Decoration Attribute in the Odoo 17
 

Ccna v5-S1-Chapter 9

  • 1. © 2008 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 1 Chapter 9: Subnetting IP Networks Introduction to Networking
  • 2. Presentation_ID 2© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Chapter 9 9.1 Subnetting an IPv4 Network 9.2 Addressing Schemes 9.3 Design Considerations for IPv6 9.4 Summary
  • 3. Presentation_ID 3© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Chapter 9: Objectives  Explain why routing is necessary for hosts on different networks to communicate.  Describe IP as a communication protocol used to identify a single device on a network.  Given a network and a subnet mask, calculate the number of host addresses available.  Calculate the necessary subnet mask in order to accommodate the requirements of a network.  Describe the benefits of variable length subnet masking (VLSM)  Explain how IPv6 address assignments are implemented in a business network.
  • 4. Presentation_ID 4© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Network Segmentation Reasons for Subnetting Large networks need to be segmented into smaller sub-networks, creating smaller groups of devices and services in order to:  Control traffic by containing broadcast traffic within subnetwork  Reduce overall network traffic and improve network performance Subnetting - process of segmenting a network into multiple smaller network spaces called subnetworks or Subnets. Communication Between Subnets  A router is necessary for devices on different networks and subnets to communicate.  Each router interface must have an IPv4 host address that belongs to the network or subnet that the router interface is connected to.  Devices on a network and subnet use the router interface attached to their LAN as their default gateway.
  • 5. Presentation_ID 5© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv4 Network IP Subnetting is FUNdamental
  • 6. Presentation_ID 6© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv4 Network Basic Subnetting  Borrowing Bits to Create Subnets  Borrowing 1 bit 21 = 2 subnets Subnet 1 Network 192.168.1.128-255/25 Mask: 255.255.255.128 Subnet 0 Network 192.168.1.0-127/25 Mask: 255.255.255.128 Borrowing 1 Bit from the host portion creates 2 subnets with the same subnet mask
  • 7. Presentation_ID 7© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv4 Network Subnets in Use Subnet 0 Network 192.168.1.0-127/25 Subnet 1 Network 192.168.1.128-255/25
  • 8. Presentation_ID 8© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv4 Network Subnetting Formulas Calculate Number of Subnets Calculate Number of Hosts
  • 9. Presentation_ID 9© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv4 Network Creating 4 Subnets Borrowing 2 bits to create 4 subnets. 22 = 4 subnets
  • 10. Presentation_ID 10© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv4 Network Creating 8 Subnets Borrowing 3 bits to Create 8 Subnets. 23 = 8 subnets
  • 11. Presentation_ID 11© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv4 Network Creating 8 Subnets(continued)
  • 12. Presentation_ID 12© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Determining the Subnet Mask Subnetting Based on Host Requirements There are two considerations when planning subnets:  Number of Subnets required  Number of Host addresses required Formula to determine number of useable hosts 2^n-2 2^n (where n is the number the number of host bits remaining) is used to calculate the number of hosts -2 Subnetwork ID and broadcast address cannot be used on each subnet
  • 13. Presentation_ID 13© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Determining the Subnet Mask Subnetting Network-Based Requirements Calculate number of subnets Formula 2^n (where n is the number of bits borrowed) Subnet needed for each department in graphic
  • 14. Presentation_ID 14© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Determining the Subnet Mask Subnetting To Meet Network Requirements It is important to balance the number of subnets needed and the number of hosts required for the largest subnet.  Design the addressing scheme to accommodate the maximum number of hosts for each subnet. Allow for growth in each subnet.
  • 15. Presentation_ID 15© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Determining the Subnet Mask Subnetting To Meet Network Requirements (cont)
  • 16. Presentation_ID 16© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Benefits of Variable Length Subnet Masking Traditional Subnetting Wastes Addresses Traditional subnetting - same number of addresses is allocated for each subnet. Subnets that require fewer addresses have unused (wasted) addresses. For example, WAN links only need 2 addresses. Variable Length Subnet Mask (VLSM) or subnetting a subnet provides more efficient use of addresses.
  • 17. Presentation_ID 17© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Benefits of Variable Length Subnet Masking Variable Length Subnet Masks (VLSM) VLSM allows a network space to be divided in unequal parts. Subnet mask will vary depending on how many bits have been borrowed for a particular subnet. Network is first subnetted, and then the subnets are subnetted again. Process repeated as necessary to create subnets of various sizes.
  • 18. Presentation_ID 18© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Benefits of Variable Length Subnet Masking Basic VLSM
  • 19. Presentation_ID 19© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Benefits of Variable Length Subnet Masking VLSM in Practice Using VLSM subnets, the LAN and WAN segments in example below can be addressed with minimum waste.  Each LANs will be assigned a subnet with /27 mask. Each WAN link will be assigned a subnet with /30 mask.
  • 20. Presentation_ID 20© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Benefits of Variable Length Subnet Masking VLSM Chart
  • 21. Presentation_ID 21© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Structured Design Planning to Address the Network Allocation of network addresses should be planned and documented for the purposes of: Preventing duplication of addresses Providing and controlling access Monitoring security and performance Addresses for Clients - usually dynamically assigned using Dynamic Host Configuration Protocol (DHCP) Sample Network Addressing Plan
  • 22. Presentation_ID 22© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv6 Network Subnetting Using the Subnet ID An IPv6 Network Space is subnetted to support hierarchical, logical design of the network
  • 23. Presentation_ID 23© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv6 Network IPV6 Subnet Allocation
  • 24. Presentation_ID 24© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Subnetting an IPv6 Network Subnetting into the Interface ID IPv6 bits can be borrowed from the interface ID to create additional IPv6 subnets
  • 25. Presentation_ID 25© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Chapter 9: Summary  Process of segmenting a network, by dividing it into to multiple smaller network spaces, is called subnetting.  Subnetting a subnet, or using Variable Length Subnet Mask (VLSM) was designed to avoid wasting addresses.  IPv6 address space is a huge address space so it is subnetted to support the hierarchical, logical design of the network not to conserve addresses.  Size, location, use, and access requirements are all considerations in the address planning process.  IP networks need to be tested to verify connectivity and operational performance.
  • 26. Presentation_ID 26© 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential