refer to the exhibit. what is the global ipv6 address of the host in uncompressed format? This is a topic that many people are looking for. bluevelvetrestaurant.com is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, bluevelvetrestaurant.com would like to introduce to you IPv6- How to get a global unicast with EUI 64 method?. Following along are instructions in the video below:
And this is sunny welcome back. Today. My topic is how a host gets a a unique global unicast address ipv6 a global unicast address is a similar to ipv4 ip address is used when a host wants to use the internet here is one example of a global unicast.
Eight groups are with 16 bit who hexadecimal numbers separated by colons 128. Bit law or together. Very long and complicated.
The hexadecimal numbers are not his sensitive lowercase letters are suggested to use even. Though i use arrow keys here for years. To come a global unicast address.
Always starts with 2 0 0. 1. A global unicast address consists over three parts the first 48.
Bit is called global routing prefix and the next 16. Bit is called subnet id. The third part 64 bit la is interface identifier or simply.
Interface id. Which is host a portion of ip address all together a global unicast address is 128 bit la. How does your device get a global unicast.
The process evolves in two parts. The first 64. Bit part.
Which includes the global routing prefix and the subnet id comes from your default gateway. The second 64. Bit is a generated by your device.
It is now lets talk about how your device gets the first 64. Bit part of a global unicast address here is how it works and ipv6 global unicast address is a generally assigned in a hierarchical manner internet assigned numbers authority or simply i a a a a top dog who is responsible for the des wrote ip. Addressing and other internet.
Protocol resources sis at the very top. Assigning the first a 16 bit to anyone does this at this point. Two zero zero.
One is the first 16 bit remember for all global unicast addresses. A new number will be giving maybe nine many years later but for years to come if you see any ipv6 address starts with two zero zero. One you know is a global unicast.
The second level is your regional isp. Which will add another 16. Bit such as 1 2.
3. 4. In this example thus.
Anyone. Under your regional isp would get to 0 0. 1.
1. 2. 3.
4. As routing prefix. The process goes on to the third level your isp will add another 16 bit.
Such as abc.
Thus. Anyone downstairs will get to 0 0. 1.
1. 2. 3.
4. Abcd as routing prefix. Now is it comes down to your organization or your companys default gateway.
Which will add one more see ting bid subnet id. Such as five six seven eight as routing prefix thus any device anyone dance tears will get 64 bit as routing prefix. Now lets talk about the second 64.
Bit id for your device. The second is 64 bit portion or interface id is it typically derived from your device marriages plus. The second portion is a decided by your device not by anyone else on the network.
A mac address is a 48 bit long. The first 24. Bit is called ui organizationally unique identifier.
Which identifies the manufacturer the second 24. Bit is called nic or network interface controller. How does a device self generate a 64 bit long interface id with the 48.
Bit. Law marriages. This method is using a feature called eui.
64. Gui stands for extended unique identifier. Which allows a device or host to assign itself a unique 64 bit ipv6 interface id eui 64 is a key benefit over ipv4 as a host is more in control eliminating the need of manual configuration or dhcp servers ip configuration.
Suppose your device mac address is a 0 0. To 1 to f be 561. 0.
Actual 16. Bit of a hex number f f f. E.
Is inserted to the middle of messages. Now. We have 64 bit of id.
The next step is a bit weird because we will flip the seventh bit from the left in order to demonstrate how it works we needed to change the first two hex numbers 0 0. To binary which is a xeros now flip the seventh bit. Which means if the seventh bit in the mac address from left is one we change it to zero or if the semi forbid is zero.
We change it to one please do not worry about the reason. Why we need to flip the seventh bit right now. And lets only focus on the process.
Now we get the interface id next step. We can combine these two parts global routing. Part and eui.
64. Part and we get a unique global unicast address keep in mind different operating systems have their own method to generate the interface id part cisco ios linux and unix systems use eu our. I 64 method microsoft windows use a random value to generate the second portion.
I hope this video is helpful thank you very much and see you next time all dont forget to subscribe music you .
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