What is IPv6 in CCNA?
IPv6 is the newest version of the IP protocol. IPv6 was developed to overcome many deficiencies of IPv4, most notably the problem of IPv4 address exhaustion. Unlike IPv4, which has only about 4.3 billion (2 raised to power 32) available addresses, IPv6 allows for 3.4 × 10 raised to power 38 addresses.
How much IPv6 is on CCNA?
Cisco CCNA IPv6 Advanced Features IPv6 has a vastly larger address space than IPv4. This results from the use of a 128-bit address, whereas IPv4 uses only 32 bits. The new address space thus supports 2128 (about 3.4×1038) addresses.
How do I use Cisco IPv6?
To configure IPv6 on a Cisco routers, you need to do two things:
- Enable IPv6 routing on a Cisco router using the ipv6 unicast-routing global configuration command.
- Configure the IPv6 global unicast address on an interface using the ipv6 address address/prefix-length [eui-64] command.
Is IPv6 difficult to learn?
But first, we have a bit of a challenge in learning and understanding the hexadecimal used to form an IPv6 address. Because we are so familiar with using base-10 and decimal notation for everything involving numbers, base-16 and hexadecimal notation may at first be a challenge, but it can be easy to learn.
How do you explain IPv6?
An Ipv6 address uses 128 bits as opposed to 32 bits in IPv4. Because an hexadecimal number uses 4 bits this means that an IPv6 address consists of 32 hexadecimal numbers. These numbers are grouped in 4’s giving 8 groups or blocks. The groups are written with a : (colon) as a separator.
How are IPv6 addresses used?
An Internet Protocol Version 6 address (IPv6 address) is a numeric label that is used to identify and locate a network interface of a computer or a network node participating in an computer network using IPv6. IP addresses are included in the packet header to indicate the source and the destination of each packet.
Why is IPv6 so complicated?
Those long IP addresses just look ugly, and managing IPv6 is much more complicated than managing IPv4. This is an important factor, because end users still have to deal with IP settings. Even in corporate environments, IPv6’s complexity means higher costs, while offering only limited benefits.
How do I enable IPv6 on a Cisco switch?
To enable IPv6 support on the Cisco 3560 switch, you simply change the SDM template and reload. Start by enabling the dual-ipv4-and-ipv6 template with one of three sub-options: S1(config)#sdm prefer dual-ipv4-and-ipv6?
Does IPv6 require DHCP?
DHCP and IPv6 IPv6 was intentionally designed to allow stateless IP address autoconfiguration (SLAAC). When stateless autoconfiguration is deployed, the host essentially grabs its own IP address with no need for an additional protocol like DHCP.
How do you calculate IPv6?
IPv6 addresses consist of 128-bit addressing and are represented in hexadecimal notation. In the above diagram, each dash represents 4 bits. Therefore 4+4+4+4 = 16 bits in each block. And 16 x 8 = 128-bit addressing.
Why NAT is not needed in IPv6?
The large number of public IPv6 addresses eliminates the need for NAT. Sites from the largest enterprises to single households can get public IPv6 network addresses. This avoids some of the NAT-induced application problems that are experienced by applications that require end-to-end connectivity.