IP address

Computer NameDNSTCPIP Properties
I have a Windows 7 PC (Name: Bbloomfield) on the network that receives IP address from the DHCP server from the Domain Controller. The IP address is 192.168.1.74 and  computer name is "BBloomfield.nxxxco.com".

When I ping the computer name from this computer, it displays IPv6 address as shown below instead of 192.168.1.74 . However when I ping the computer name from another computer on the same network, it returns 192.168.1.74.

DNS server shows 192.168.1.74 as seen above.

----------------------------------------------------------------------
C:\Users\rab>ping bbloomfield.nxxxco.com
Pinging BBloomfield.nxxxco.com [fe80::80a2:cb53:35ad:3eda%11] with 32 bytes of d
ta:
Reply from fe80::80a2:cb53:35ad:3eda%11: time<1ms   4 times
-----------------------------------------------------------------------
C:\Users\rab>IPCONFIG /ALL
  Link-local IPv6 Address . . . . . : fe80::80a2:cb53:35ad:3eda%11(Preferred)
  IPv4 Address. . . . . . . . . . . : 192.168.1.74(Preferred)
-----------------------------------------------------------------------

Is this because IPv6 is enabled on TCP/IP property window? We do not use IPv6 at all. There are less than 15 PCs in the office. Should I disable IPv6 on each computer TCP/IP properties? Is there a downside for disabling IPv6?
LVL 1
sgleeAsked:
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Prashant GirennavarCommented:
You can disable ipV6 on client systems , if your enviornment is not using ipV6.

The reason you are seeing IPV6 IP address is you have the IPV6 enabled on the NIC as you have stated , also I Belive , the registry entry for DHCP for IPv6 has not  been disabled.

So , I would suggest uncheck the ipV6 from NIC property and disable it from registry as well,

Read my article where to disable  it in Registry


http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Windows_Server_2008/A_10589-Disabling-IPv6-on-Servers-Workstations-using-Group-Policy-Preferences.html

More on this topic is here,

http://blogs.technet.com/b/netro/archive/2010/11/24/arguments-against-disabling-ipv6.aspx

Hope this helps.

Thanks,

-Prashant Girennavar
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Brian PiercePhotographerCommented:
It will do no harm to leave IP6 enabled, even though you do not use IP6 as such some windows functions increasingly use IP6
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sgleeAuthor Commented:
What is obvious problem/disadvantage with disabling IPv6?
Based on articles given above, IPv6 does not seem to apply on a 15 computer network.
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skullnobrainsCommented:
on a windows network, it is said that some features require ipv6. microsoft's docs state in various places that ipv6 is mandatory for proper domain operation though none of the ones i browsed ever listed the features that would fail without it. any other system will not care if it uses ipv6 or ipv4.

i can tell you that a regular dc setup with file shares, possibly roaming profiles, and GPOs works fine without ipv6.

ipv6 does apply on a 15 computers network but is uselessly complex, likely insecure, messy by design...
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Fred MarshallPrincipalCommented:
When I ping the computer name from this computer, it displays IPv6 address as shown below instead of 192.168.1.74 . However when I ping the computer name from another computer on the same network, it returns 192.168.1.74.
You can ping with the "-4" option to get ipV4 addresses.
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