Course Content
Address Resolution
Explain how ARP and ND enable communication on a network
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CCNA: Switching, Routing, and Wireless Essentials
The second course in the CCNA curriculum focuses on switching technologies and router operations that support small-to-medium business networks and includes wireless local area networks (WLAN) and security concepts.
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CCNA: Enterprise Networking, Security, and Automation
The third CCNA course describes the architectures and considerations related to designing, securing, operating, and troubleshooting enterprise networks – including wide area network (WAN) technologies & quality of service (QoS) mechanisms for secure remote access, along with software-defined networking, virtualization, & automation concepts supporting network digitization.
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CCNA Course
About Lesson

Subnet an IPv6 Network

Implement a subnetted IPv6 addressing scheme.

Subnet Using the Subnet ID

IPv6 was designed with subnetting in mind.

  • A separate subnet ID field in the IPv6 GUA is used to create subnets.
  • The subnet ID field is the area between the Global Routing Prefix and the interface ID.

IPv6 Subnetting Example

Given the 2001:db8:acad::/48 global routing prefix with a 16 bit subnet ID.

  • Allows 65,536 /64 subnets
  • The global routing prefix is the same for all subnets.
  • Only the subnet ID hextet is incremented in hexadecimal for each subnet.

 

IPv6 Subnet Allocation

  • The example topology requires five subnets, one for each LAN as well as for the serial link between R1 and R2.

  • The five IPv6 subnets were allocated, with the subnet ID field 0001 through 0005. Each /64 subnet will provide more addresses than will ever be needed.

Router Configured with IPv6 Subnets

  • The example shows that each of the router interfaces on R1 has been configured to be on a different IPv6 subnet.

Other related topics

 

Topic Title Topic Objective
IPv4 Issues Explain the need for IPv6 addressing.
IPv6 Address Representation Explain how IPv6 addresses are represented.
IPv6 Address Types Compare types of IPv6 network addresses.
GUA and LLA Static Configuration Explain how to configure static global unicast and link-local IPv6 network addresses.
Dynamic Addressing for IPv6 GUAs Explain how to configure global unicast addresses dynamically.
Dynamic Addressing for IPv6 LLAs Configure link-local addresses dynamically.
IPv6 Multicast Addresses Identify IPv6 multicast addresses.
Subnet an IPv6 Network Implement a subnetted IPv6 addressing scheme.

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