It's not IPV6 for a man to live his life as a IPV4 (iii)

A strange woman sits across from me.
A long letter and a picture of an old man

I don't want to know her story.
Maybe I'm a little more sorry than I may be.

It's like you're in a faraway place I'm on my way home
And I dreamed I sang for you yesterday
Singing a moving song seems to be born sad
I can open my eyes and you'll sleep by my side

I used to be tired of depicting every future.
Until they all become real now.

And I want to go back to the moment I met you
No disturbing dreams, no trivial things.

A brother of a year with tears in his glass and asked me
He said, what do you think I can think about besides music and love?
I looked at her face like a mirror.
I said to him, look at you.

It's like she's in a faraway place, you're on your way home.
I dreamed of you singing for her yesterday
Singing a moving song seems to be born sad
Open your eyes and she'll sleep in peace

I used to be tired of depicting every future.
Until they all become real now.
And I want to go back to the moment I met you
No disturbing dreams, no trivial things.

I used to be tired and quiet waiting for you to come back
No disturbing dreams, no trivial things.

A song "Come and Go Poetry", for fear that everything is too late, weekends in overtime, thoughts do not know where to run?

Office culture is the drawback of this, even if there is no work, do not pretend that they are very busy appearance, the most taboo holiday back, all also to give a period of relaxation, life is not every day is a holiday, work is to earn a little spiritual loss, otherwise, Operation Dimension will be a soldier, Ching Lloyd, this soldier to busy not up, Sometimes you don't know what you're doing. Study yourself, think so many East son will not, from where to start, so still deal with the mood in dealing with things, this looks more appropriate. If the topic is IPv4, then why not make up your mind about the network protocol ...

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A song "city says"
I have a layer of red skin on my body.
It's covered with thorns.
They're all around you every day.
When you sit and stand, they look at you.
I see the way you used to be
Like a kid with a balloon.
You think it can fly you far, but
It flew away, and you haven't opened your eyes yet.
This is what this life is like.
I'm used to you, son.
You think it can fly you far, but
It closes his eyes and you see only your shadow.

(music)
Get out of here and take your loved ones.
My body can be trampled by you as long as you have not forgotten the dream of the past
Kiss here and look back at me
One day you have wings, please fly for me
Get out of here and take your loved ones.
My body can be trampled by you as long as you have not forgotten the dream of the past
Kiss here and look back at me
One day you have wings, please fly for me
Those warm times.
It's a gift I gave you.

IPV4:

IPV4 address number of 32-bit, that is, up to 2 of the 32-time computer can be linked to the Internet, nearly a decade, due to the rapid development of the Internet, IP address demand is increasing, making IP address issuance more stringent, The information indicates that the global IPV4 address may have been fully completed in the 2005-2008-year period.

Of the approximately 4 billion addresses allowed by IPV4, three address blocks are reserved for private networks. These address blocks are not routable outside the private network, and hosts within the private network cannot communicate directly with the public network. But through the network address translation, they can do the latter.

And then what. Then represents the IPV4 of the past, just like the simple occupation of operations, will soon be forgotten. Just a matter of time, so in the IPv4 world, we are 32-bit, this 32 is like the song fat that can't Meet the girl, do not like to say that they are fat skinny. Even if the affectionate singing Buddha in a line, or can not accompany Miss Dong ride a zebra, casually said six fan is too dirty, as six Hyun on take minded, lack still can't stop Jasmine Ann after Nanshan still "South".

IPv6:

IPV6 concept has been out for a long time, why the current mainstream or IPv4? (know)

Is it because the popularity of routers makes subnetting more common and increases IP in a disguised way? Or the other?

From the university maintenance I have done for several years, the main reason for the slow development of IPV6 is that V4 V6 is incompatible. This is the most important reason!!!
The specific reasons are as follows:
1.ipv4 and IPv6 incompatible, resulting in IPV6 network if there is a point does not support IPV6 then separated two IPV6 network, must use IPV6 over XXXX tunnel, and configuration, maintenance, performance and other reasons, not a strong demand, certainly someone willing to do this tunnel, network management also too troublesome.
2. Domestic Network engineer, maintenance class of personnel for IPv6 proficient less, use fewer people, learn less people, learn less, and lead to use fewer people.
3.ipv6 Theoretically, a 64-bit processor is required to ensure the best performance. Need to upgrade equipment, but for any one of the profitable network is unwilling to do high investment, low returns.
4.NAT and other network protocols, a good solution to the public network IP address problem, delay the demand for IPV6.
5. Now the equipment manufacturers, most of the supporting software sold separately, it is said that when you buy equipment, there is no IPv6 function, although the later version will support, but if you want to upgrade support IPV6 version, sorry, please purchase a new version. As far as I know, prices are generally very expensive.
6. At present, IPv4 address is scarce, in Europe, North America and so on, there is no shortage of China's so severe. China is the most scarce, but our demand for the IP address of the public network is not necessary. Often we use NAT to meet the needs of daily Internet chatting.

To say the reason, I think there is only one word: money.

IPV4 (hereinafter referred to as V4, the same) and IPV6 (hereinafter referred to as V6, the same below) two agreements differ too much, and the current V4 is not so bad to completely not be able to use the extent, so whether it is hardware manufacturers or ISPs have no power to change the V6 address.

In other words, to change, need money, the benefits of this money is not very significant, the yield is too poor, so are not willing to change.

First NAT temporarily solves the problem of insufficient addresses, although NAT causes many end users to not have direct point-to-point connections, but there is no problem with regular network usage, and there are various ways to penetrate NAT.

Although the private address segment adds up to less than two A-class addresses,If you have 1% of the world's IP addresses using NAT, it's basically the equivalent of doubling the number of existing addresses.。

Hardware upgrades are always accompanied by a variety of trouble, to money, to compatibility and so on, Take a look at the speed at which the USB3.0 replaces the USB2.0, and it is estimated that it will take many years to completely eliminate USB2.0, and it has been years since the SATA HDD retired the IDE hard drive, and most AHCI controllers still retain support for IDE mode. This is still the case when there is a consumer demand and the old hardware is completely unable to meet the demand. And V4 still can meet the needs of most people, then to be replaced by V6, the road to go is still very long.

To fully promote the V6, the need from the backbone to the end user of all the equipment to upgrade, the backbone of the network is not only telecommunications, unicom networks, but also the banking, railways, military and so on the internal network, but also mobile, Unicom's mobile communications data network, no matter which network transformation, Have to pay a huge cost. I have been involved in the transformation of the core equipment of a network, I know the cost is hundreds of millions of dollars, the scale is not big, if these network full transformation, I estimate should be a super tens of billions of projects.

Backbone network After the transformation is all right? No, there are various end devices, home network cards, routers, computer software needs to be upgraded. Fortunately, the mainstream operating system has been supporting the V6, other aspects, can only say one step to calculate it.

And most crucially, the entire internet is now on top of the V4 network, so V6 data sometimes requires 6to4 technology to get to the destination, and to change the situation, you need to switch the entire Internet into a V6 network, and then let all V4 messages use 4TO6 technology for transmission. I do not know how much the cost of this switch, and how much cost, but I guess the partial network is certain, this part of how big is not good to say. Ordinary users can afford the cost of breaking the net, but some important enterprises such as electricity, railways, airlines, banks, the cost of these broken nets is not good to say.

It has been mentioned that IoT technology is driving V6, and I think the impetus may be limited, because V6 's protocol is more complex than V4, because the current network is V4, and to support V4 and V6 stacks at the same time, it is a burden for devices with limited performance and storage space in the IoT. Of course, if the internet of things has always been the V4 address, then it may be more difficult for V6 to roll over. The more widely a protocol is used, the more difficult it is to be replaced, and only to tinker with the original basis. V4 and V6 in the face of the dilemma also lies in this, in addition, even if the entire Chinese network is replaced by V6, the global still have so many backward countries still use V4 equipment to do?

Money, in the final analysis, is the problem of money. There is not enough money to invest, there is not enough return.

This is going to be different from IPv6 and IPv4. Many students think IPv4 replaced with IPv6 software update, as long as the download and installation on the line. In fact, these two are completely different protocols, the IPv6 address is 128 bits, its packet format is completely different from the IPv4. Not only is the package format different, but the IPv4 protocol number in IPv6 also varies greatly. For example, the ICMP protocol has a protocol number of one in IPv4, while the next header of ICMPv6 in IPv6 is 58. This also determines that the deployment of IPv6 is by no means simply IPv4 the address of the device in the network to IPv6.

In the network, unicast traffic needs to be routed. Imagine that your device has a IPv6 address, but without a IPv6 route, it is natural that the packets will not be forwarded correctly. So the first problem now is to let routing devices around the world learn IPv6 routing through bgp-v4.

IPv6 has been proposed in the last century, but the introduction of CIDR and NAT technology has also slowed the crisis of IPv4 address depletion. As far as the present situation is, the driving force for IPv6 development is the internet of things and the mobile network (and of course, the juniper of that master figure Jeffard lobbying around). In the mobile network, the direct traffic of the base station actually goes to the 6to4 tunnel, that is, we can not see the IPv6 address on the public web. On the other hand, the Internet of things research is very slow, basically is to throw money, can a little research results is the world can count of those it oligarchs. Therefore, the general enterprise and the user to IPv6 not so urgent demand, this is also the IPv6 deployment sluggish important reason.

Of course, IPv6 's replacement of IPv4 in the next decade will be a must, and the drawbacks of NAT are making the network architecture increasingly complex and deviating from the original idea of network pioneers for the user-side equality. The increasing complexity of network problems increases the cost of network maintenance, which is what network equipment providers are reluctant to see. We can see from the update of the operation commands of Cisco and juniper that IPv6 is really not far away from us.

GFW in IPv6 is not so to force, I listen to our teacher said that when a central senior leader asked GFW can be used in IPv6, answer Yue not fully ready, so he said: "That this first put."

The layering of the Internet makes each layer have different protocols and specifications, except the IP layer (network layer) only IP protocol. As the only slender waist between the layers, the change of the IP layer affects many other layers.
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5 people agree

I am a college student, I am from the perspective of my university to publish some views, as a way to use it.

IPv6 This word is studied brother's mouth learned, "and so IPv6 out, download off-campus resources is no longer a dream." "At that time 2011 just entered the university, to these unfamiliar words very no concept, so constantly ask classmates, ask senior, not a few very understand, teacher class is also dragonfly water." Study without any propaganda, let alone encouragement. Now, downloading off-campus resources is still a dream.

Some time ago, an accidental opportunity from a technical cow that can use IPv6, the steps are very simple, the C-disk host file update on the line. Sure enough, Facebook, YouTube and other foreign sites on board. However, after the client upgrade has not seen LadyGaga Twitter, it seems that the school is not only discouraged, but also unwilling to prevent students to see some "fresh" things.

Should be a free and open University, with the most use of computers, such as eating, easy to accept new things youth of the university are not propaganda, promote IPv6, I think "IPv6 concept has come out for a long time, why is the mainstream or IPv4?" "It will be a problem when I graduate," he added.

Personal Opinion:
Mainly because IPV6 and IPV4 incompatible, need to re-replace equipment, transition is not smooth, so we tend to first to the value of IPV4 dry. No need to spend extra money to re-update the device. So support IPV6 site is still not many, only Google and other foreign web site support, there seems to be no site support, such as Baidu does not support (here is not absolutely sure, but in schools can use IPV6 visit Google, cannot access Baidu).
At present IPV6 is still mainly in the education network many schools open. The school may have the cause of achievement, willing to pay to buy IPV6 equipment. However, in the control of the network, do not want to spend more money to upgrade equipment, unwilling to give up fees and other reasons, refused to spend effort to publicize IPV6.
Take my school, in the school for many years, do not know their school actually still have IPV6, because the school basically does not advertise at all. Reason, privately think is use IPV6 words, do not go school gateway, also do not have to pay money to school. Corroboration is that the school insisted that only in the laboratory and other small areas of the use of IPV6, and the vast number of wireless classrooms, dormitory areas are not open IPV6.

First of all, the IPv4 address in China is not enough to use is an indisputable fact.
Second, not only in China, with the development of new technologies, IPv4 must not meet the needs of users.
But the IPv4 transition to IPv6 is definitely not as simple as upgrading a patch, and not as automatic as Windows Update.
(1). The content provided by ICP is first migrated/compatible to IPv6.
(2). ISPs have to do a good job of laying IPv6 backbone networks.
(3). Hardware vendors (Router switches ... ) also need to do a variety of coordination work.
(4). It is best to make the user feel free to replace.

Just write aFrameSomeone read and write.
Of course, the order should be (2) + (3) Go forward first, (4) transition, (1) will naturally follow.

A series of methods used to prevent IPv4 addresses from being exhausted, such as NAT, etc., andcan't solve the problem of address perfectly., but also has a certain impact on network performance or increase the cost of management. Not to mention wait until the era of the Internet of things, all kinds of equipment to access the network, the address is not enough.

Now the major domestic ISPs are upgrading their backbone network to the V6 network, in a few other answers I also saw someone mentioned V4 V6 interoperability problem, because at that time when the design was not considered interoperability, so from the message structure, is not.


now the study of transition technology, common or better used is usually a tunnel, translation。
Tunnel, according to theoretical analysis is the impact of network performance, the same, the state of translation will also increase management costs, so the current research direction is mainly stateless translation. Since then, the backbone network has become 6, the problem of interoperability will become 4-6-4, 4-6-6,6-6-4 these three problems. No more than is in 4 and 6 of the border to do a stateless translation, well-matched such as DNSV6, can achieve 46 interoperability. Of course, for some application layer things, may still be a tunnel supplement,Therefore, there will be no state translation-oriented, tunnel-assisted transition technology。

Some would say,native double stack is not very good, the original double stack do not consider the problem of interoperability。
Double stack is really a good thing, 4 6 of the problem to separate 4 Walk 4 road 6 walk 6 to the bridge. However, this is not a transitional evolution, but a sense of standing in place, will not promote the promotion of IPv6 technology has a positive impetus.

Now V6 encountered the problem is, because of the cost of replacement, short period of V4 exhaustion and not to the point of urgency, not to mention there are various ways to help V4 "Life", so ISP although the country pushed away, but the enthusiasm is not particularly high. As a hardware manufacturer, it will only be done if there is a need. Including the ICP, the user has gone to 6, it naturally support V6.

Users, slowly guide it, it is best to have some killer application came into being

1, how ie6\7\8 still so many people use? It's hard to change the user's habits.

GFW V6 version Development Manpower shortage

Feel because enough to do, give a fake example: My Computer with XP, and then you let me upgrade Win7, you say Win7 how good. I said, my original program can run on the Win7? You said, no, there will be compatibility problems, the solution is that you can spend money to buy the latest version of the program. Then I will say, do not upgrade me. XP is better.

IPV6 is like a newer, more advanced, and never-limited global Internet path,
And now the backbone, edge and terminal compatibility upgrade between V4 is no longer a technical blank.
But the point is not to discuss the significance of building the road itself,
But what kind of intelligent applications and resources will this road carry, connect and innovate for the new technology world?

Even if it's still mirrors. So the IPv6 estimate adaptation of the IoT is a problem, so give yourself a personal hazard, will study to the end? ....

This article is from the "lake and Laughter" blog, please make sure to keep this source http://hashlinux.blog.51cto.com/9647696/1788258

It's not IPV6 for a man to live his life as a IPV4 (iii)