IPv6

Brain_Power

Please post any tips or easy rules to remember for IPv6, in relation to CCNA questions.

Thanks!

Roguetadhg

4,8,128

4 Hexidecimal.
8 Groups.
128 Bit

The 128 is a little more difficult to remember, but I find the 4/8 to be an easy rule.

synseq

Brain_Power wrote: »

Please post any tips or easy rules to remember for IPv6, in relation to CCNA questions.


Thanks!

There are several things I would focus on such as the features of Ipv6.. Auto-config, plug and play, no broadcasts(replaced with multicasting). Identifying valid IPv6 addresses: X:X:X:X:X:X:X:X where X is a 16-bit hexadecimal field, 128 bits long(expressed in hexidecimal), single loopback address(0000:0000:0000:0000:0000:0000:0000:0001).


Since 16 bits are reserved for the local portion of subnets, in an IPv6 network it is possible to generate 65536 subnets.


6 to 4 tunneling, ISATAP tunneling, and teredo tunneling.


Common IPV6 addresses:
Loopback address - ::1
Link-local address - FE80::/10
Site-local address - FEC0::/10
Global address - 2000::/3
Multicast address - FF00::/8


Ipv6 Multicast addresses(well-known) -


ff02::1 All nodes on the local network segment
ff02::2 All routers on the local network segment
ff02::5 OSPFv3 AllSPF routers
ff02::6 OSPFv3 AllDR routers
ff02::9 RIP routers
ff02::a EIGRP routers


The entire global-unicast IPv6 address range is from 2000::/128 to 3FFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF/128, which results in a total of over 42,535,295,865,117,307,932,921,825,928,971,000,000 usable addresses(only 1/8 of total ipv6 address space, IPv6 uses up to 128 bits which provides approximately 3.4 * 1038 addresses).


That is just some of the basics I doubt the CCNA cert will have more than a few questions regarding Ipv6. Good luck.