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87 votes
Accepted

Is "IPv10" a joke or a serious RFC draft?

As Ron said, anyone can write a proposal. I have a hard time taking proposals seriously from someone who suggests interconnecting satellites with optical fiber, though. Also, I can't imagine this ...
Teun Vink's user avatar
  • 17.4k
28 votes

Is "IPv10" a joke or a serious RFC draft?

You must remember that anyone can submit proposals to the IETF, and they are taken seriously, until they are either adopted or die due to lack of interest. This particular proposal has expired and ...
Ron Maupin's user avatar
  • 99.8k
19 votes

Is "IPv10" a joke or a serious RFC draft?

Is “IPv10” a joke or a serious RFC draft? Both. That draft doesn't solve a single problem but opens a can of new ones. I guess that bloke is serious and he doesn't get what ridiculous schemes he's ...
Zac67's user avatar
  • 84.9k
6 votes
Accepted

How does computer in IPv4 network communicate with computer in IPv6 network

IPv4 and IPv6 are two completely separate protocols, with separate, incompatible packet headers and addressing, and an IPv4-only host cannot directly communicate with an IPv6-only host. The correct ...
Ron Maupin's user avatar
  • 99.8k
5 votes
Accepted

What are the correct protocol versions (v4 vs v6) for packets inside DS-Lite tunnels?

The consensus of the comments is The segments are inside IPv4 The protocol of TCP happens to be 6 and it's not its IP version number As you say, if you're looking for 4s vs 6s for protocol versions, ...
jonathanjo's user avatar
  • 16.3k
4 votes
Accepted

Understand DSCP and Precedence Values in Ipv4 or Ipv6 packet

The IPv4 DSCP (IPv6 Traffic Flow) packet header field can be used to mark packets for later treatment in network congestion. There are recommendations and guidelines for interpreting these values a ...
Ron Maupin's user avatar
  • 99.8k
4 votes
Accepted

What "IVI" from "IVI Translation" stands for?

This document presents the CERNET IVI translation design and deployment for the IPv4/IPv6 coexistence and transition. In Roman numerals, the "IV" stands for 4, and "VI" stands for ...
Ricky's user avatar
  • 32.3k
4 votes
Accepted

IPv4 to IPv6 one-to-one mapping for a whole Class A range

First IPv4 network classes are dead, killed in 1993 by RFCs 1518 and 1519, which defined CIDR (Classless Inter-Domain Routing). Modern networking doesn't use network classes, and it has not for many ...
Ron Maupin's user avatar
  • 99.8k
4 votes

How does computer in IPv4 network communicate with computer in IPv6 network

Welcome to the messy world of the IPv6 transition. IPv4 and IPv6 are two seperate protocols that do not directly interoperate. The IPv6 proponents idea was that we would all move to dual stack, ...
Peter Green's user avatar
  • 13.3k
4 votes
Accepted

Is it possible to see a Teredo IPv6 address in IPv6 neighbor cache?

You won't see Teredo addresses in the neighbor cache, because Teredo creates a virtual point to point link and therefore has no neighbors. A neighbor is another device (which, for this purpose, speaks ...
Michael Hampton's user avatar
4 votes

Security implications of IPv6 tunneling over IPv4

I've read that IPv6 over IPv4 tunnels are a security risk because IPv6 traffic cannot be intercepted by Intrusion Detection Systems and Firewalls. That's completely untrue. Maybe some specific, very ...
Teun Vink's user avatar
  • 17.4k
3 votes
Accepted

Translation from unique local to global unicast address

There's a multitude of IPv4-to-IPv6 transitioning mechanisms - for an overview check WP:IPv6 transition mechanism. IPv6 is normally deployed (and should be) with local and public IP addresses ...
Zac67's user avatar
  • 84.9k
3 votes

What are the correct protocol versions (v4 vs v6) for packets inside DS-Lite tunnels?

Turns out, Wireshark confirms what our engine said - that the packet inside IPv4 layer is indeed TCPv6. As jonathanjo already wrote: The (6) is the IPv4 (!) protocol number which is 6 for TCP and 17 ...
Martin Rosenau's user avatar
3 votes
Accepted

IPv4 only host on a dual stack environment

Dual-stacked hosts can easily get to either IPv4 or IPv6 devices. You need to make sure that DNS is correctly set up. Such a host will probably default to IPv6 if there is a AAAA record, so you do not ...
Ron Maupin's user avatar
  • 99.8k
3 votes

Security implications of IPv6 tunneling over IPv4

There are a few tunneling protocols, but I'm guessing you're talking about these: (1) 6to4 tunnels, which are trivially stopped by firewalls, as they are clearly marked as IPv4 protocol 41. (2) teredo ...
user84215's user avatar
  • 131
3 votes

IPv6 Subnetworks Explanation

Maybe the simplest one: Is a v6 address static? Or can I make it static like a v4 one so that I can reach my printer at home for example? IPv6 addresses like ipv4 ones can be either dynamic or static....
Peter Green's user avatar
  • 13.3k
2 votes

IPv6 subnetting with different end device requirements

Just use a /64 for every network, don't overthink it. And with a /48 you have more than enough /64's to use one for every network and use one /64 to split into /127's for point to point links. If you ...
Teun Vink's user avatar
  • 17.4k
2 votes
Accepted

Error in IPv4-to-IPv6 mapping of Google IT Support Professional online course?

Google's course is wrong. As you correctly discovered, IPv4 address 192.168.1.1 does not map to the IPv6 address 0:0:0:0:0:ffff:d1ad:35a7. That said, it's possible that you will be marked "wrong&...
End Antisemitic Hate's user avatar
2 votes
Accepted

Benefits for adopting ipv6 internally?

What is the current status of ipv6 adoption in terms of usefulness? Google maintains an IPv6 adoption page, and there is a per country adoption tab. Specifically, if I have a network of ...
Ron Maupin's user avatar
  • 99.8k
2 votes

Is it possible to see a Teredo IPv6 address in IPv6 neighbor cache?

If you are seeing teredo addresses in a neigbour cache then something is seriously misconfigured. Teredo creates a virtual interface on the teredo client allowing it to communicate with other teredo ...
Peter Green's user avatar
  • 13.3k
1 vote
Accepted

ISATAP configuration not working when adding hosts

solved, Problem was not enabling ipv6 unicast routing. this can be done by using: ipv6 unicast-routing.
Shak's user avatar
  • 121
1 vote

Is "IPv10" a joke or a serious RFC draft?

It's a serious attempt to solve a real problem. Whether the solution is good or bad (it's probably rubbish), its problem statement is correct: the current strategy of trying to implement IPv6 has so ...
thomasrutter's user avatar
1 vote

IPv6 create many gateways

A different setup would probably make more sense for IPv6. Putting multiple /64s on one layer-2 domain isn't very useful. Just one /64 has 2^64 addresses. You could let each server pick addresses from ...
Sander Steffann's user avatar
1 vote

Identifying teredo packets and teredo relay port

The thing you have to understand about Teredo is it's NOT a traditional client-server protocol. It's a NAT traversal based protocol. Relays have more in common with clients than they do with servers. ...
Peter Green's user avatar
  • 13.3k
1 vote

Migration from IPv4 to IPv6 strategies

While IPv4 addresses are no longer being given out like candy that doesn't mean it's nessacery or practical to get rid of IPv4 completely in the near future. Turning up ipv6 is a good first step ...
Peter Green's user avatar
  • 13.3k

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