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Questions tagged [ipv6]

Questions about IPv6, the newest version of the Internet Protocol. This tag should be used when asking about personal/home network IPv6 addressing, or basic IPv6 knowledge. Questions related to company-grade IPv6 networks are off-topic and should be asked on Network engineering SE.

The length of an IPv6 address is 128 bits, compared to 32 bits in IPv4. Therefore the address space supports 2128 or approximately 3.4×1038 addresses. This means that many more devices can be connected directly to the Internet.

A typical IPv6 address would be represented like this:

fe80:0000:0000:0000:0202:b3ff:fe1e:8329

but there are rules for shortening the address such as removing leading zeros:

fe80:0:0:0:202:b3ff:fe1e:8329

or replacing consecutive groups of zeros with a double colon:

fe80::202:b3ff:fe1e:8329

IPv6 on Wikipedia

1295 questions
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3 answers

Why is there a percent sign '%' in the IPv6 address?

I am using the .NET Framework classes to get the IP addresses for my machine: Dns.GetHostAddresses(Dns.GetHostName()) I have a VirtualBox adapter which has both an IPv4 and IPv6 address. Using the .NET code, I am getting the IPv6 address as…
Amith George
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Is IPv6 'faster' than IPv4?

Are there any practical speed/latency gains from using IPv6, or is it just to make room for more IPs?
Jane Panda
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11
votes
8 answers

IPv6 for home users

What is the best way to use IPv6 if you are a home user. I have a number of vista/ws2k8/w7 machines at home, but they are behind a NAT firewall which is not IPv6 compliant! How can they be attached to a public IPv6 network? For example, I want to be…
Nick R
  • 595
8
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2 answers

How can I purchase an IPV6 address?

Is is now possible to purchase either a single IPV6 address or blocks of them considering how many there are available? I've come across a few questions on here but most of them from what I can see are referring to IPV4 addresses such as this one.
Alexis Tyler
  • 195
8
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1 answer

Disable or enable IPV6 in router?

I am trying kinda tinkering with my internet and read recently that some argue disabling or enabling IPV6 can actually a good/bad thing to do. I checked with my ISP and at the moment they have NOT implemented IPV6 within their infrastructure but…
user744222
  • 81
6
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1 answer

What is Hurricane Electric's IPv6-enabled DNS server?

Hurricane Electric has IPv6-enabled DNS servers for use with their tunnelbroker. What are the addresses for these servers?
joeforker
  • 642
6
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2 answers

IPv6 - Is my device accessible from the internet?

If I have an IPv6 provided by my router via DHCP, and my router also has an IPv6, because there is no NAT involved with IPv6, does that mean that my computer is accessible directly from the internet? In otherwords, does this mean that my port 80…
billsecond
  • 187
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2 answers

How to connect 2 PC by IPV6 in a LAN?

I have two PC, A and B, connected by a switch. I installed ipv6 on both of them. Autoconfigure give them 2 IPV6 address: A preferred link-local fe80::21e:4fff:fec4:50f7, life infinite B preferred link-local fe80::221:9bff:fe32:811e, life…
lilyonwind
  • 105
4
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3 answers

What is the best practice for ipv6 address assignment when using a dynamic prefix?

My ISP recently enabled ipv6 and I thought to myself this would be a good opportunity to roll out ipv6 on my LAN. Unfortunately, I only get a dynamic prefix so I never know the addresses / the subnet of my devices. This makes life difficult for me,…
Aljoscha Vollmerhaus
  • 71
4
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1 answer

IPv6 stateless autoconfiguration + DNS

How do you use radvd on linux/Ubuntu to distribute IPv6 DNS server addresses?
oliver602
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4
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1 answer

When will the LIR's run out of the IPv4 addresses?

"The Asia Pacific Network Information Centre, the RIR responsible for assigning IP addresses to the region, announced the release of its last available batch of IPv4 addresses on 15…
LanceBaynes
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3
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How do you view ipv6 websites through browser?

When I had Apache installed and running, I could type in "127.0.0.1" or the inet address I got from ifconfig, and I would be connected to my server. However, if I type in "http://[::1/128]" in my address bar, I just get a Google search. How do I…
math4tots
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Can two offices communicate if one uses IPv4 and the other IPv6?

If I get an IPv6 from my ISP for my new office branch, will I be able to communicate with my old branch that is using IPv4?
siraj
  • 31
2
votes
1 answer

Behavior of IPv6 Privacy Extensions

IPv6 privacy extensions are defined in RFC 4941. From that I understand that the temporary interface identifier is not only chosen anew when the temporary lifetimes expire, but also when the link changes. RFC 4941 says: 3.3. Generating Temporary…
countermode
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Why does IPv6 use 128 bit addressing?

When I first heard about IPv6, I just assumed that it doubled the number of addressing bits in IPv4, from 32 bits to 64 bits. This would have been enough for at least 2.6 billion addresses for each person on the planet. I just found out that the…
Mark Ransom
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