IPv6 Resolving when ping

Hi Guys,

Some some reason, when I ping a server it is resolving to a IPV6 address.  I also noticed that all the servers for this client have both the IPv4 and IPv6 checked.  However, the servers have a static IP address for IPv4.  should I disable IPv6 on DHCP and uncheck the IPv6 box on all the servers?  Is that the right approach?
sergio vegasystems administratorAsked:
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JAN PAKULAICT Infranstructure ManagerCommented:
dont do it

Disabling IPv6 Breaks Functionality

Are there negative consequences to disabling IPv6 on a Windows 7 PC? Several features of Windows 7 depend on IPv6 to function as intended, including:

DirectAccess, which allows users to remotely access corporate resources whenever they have Internet connectivity, as if they were directly connected to the corporate LAN.
Remote Assistance, which enables users to invite remote users to connect to their computer to help them when they have problems.

HomeGroup, which makes it easy for users to share their libraries and printers on their home network.


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JAN PAKULAICT Infranstructure ManagerCommented:

ping <name or ip> -4  (for ipv4)

the same goes for ipv6, just add -6
If both IPV6 and IPV4 are working correctly in your environment I would leave them enabled.  There no 'right' approach, but moving toward IPV6 is a good goal.

Think about why you have static IP addresses in version 4.  Most likely you locating boxes these by address rather than by name and therefore you don't want that address to change which is a possibility in the DHCP model.  An example of this may be a static NAT on your router mapping a public address to an inside address. Another example, is your DHCP server.  It will give out the DNS server addresses and not names.  So if you doing your own DNS these usually need a static IP address.

Normally, if you need you servers to have a static IPV4 address, then you will want to assign them a static IPV6 address.  

Also keep in mind, in windows ping -4 will force an IPV4 ping and ping -6 will force a IPV6 ping.  With Linux ping command is always IPV4, to do a IPV6 ping use need to use the ping6 command.
sergio vegasystems administratorAuthor Commented:
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