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Why would my computer (Vista Business) begin to start pinging using IPv6? I have not to my knowledge made any change to enable this.

When I ping a local computer with it's hostname, ping has started to display the IP6 address it resolves to and not the IPv4 address.

Any ideas?

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Because computer can understand only numbers and not name like ( 0 and 1).And also when you work on domain there is a Reverse Look-up zone which has done this function. –  user94341 Aug 16 '11 at 9:31

3 Answers 3

It's probably because when ping looks up the hostname your DNS returns an ip6 address. Check with whomever is in charge of your DNS server.

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Just go to network card properties, uncheck the IPV6 address option and restart the machine. default ping to hostname will resolve to ipv4 address.

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Not an answer to the question which is just "why". Also you will want IPv6 support when possible. –  MDeSchaepmeester Jul 31 at 21:19

Because some one bright decided it was time for all of us to move to IPv6 and one of the numerous Microsoft updates changed ping to return the IPv6 address. It also had Windows machines publish the IPv6 address in the DNS server making a bloody mess out of the DNS database files.

Now the solution is to go to 200 + machines and turn off IPv6.

Sorry if I sound a little bitter.

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