When I try to disable IPv6 in Network Systems Preferences under Advanced, TCP/IP the only options I am presented with are "Automatic", "Manually", and "Link-local only". Shouldn't there be an option "Off" also? Is there some other way to turn off IPv6 in Mavericks?
iMac, OS X Mavericks (10.9.1), 40 Mbps Internet
Why? What are you trying to accomplish?
Grant
I'm having a problem with DNS server addresses in Network Preferences. They won't "stick", meaning that they disappear when I reboot and I have to reenter them again. I was told by somebody else that turning off IPv6 would solve the problem.
Anyway, since I wrote, I have learned to turn off IPv6 using a unix command, viz.,
networksetup -setv6off Ethernet
However, it didn't help with the problem I'm having with DNS settings and, obviously, turning off IPv6 probably isn't a great long-term solution anyway. Must be a bug that Apple needs to address.
I'm not having that problem - it would appear that either you have a setting wrong or something is corrupted.
When did this begin?
Grant
Why not copy the DNS addresses, and enter them manually as "additional" DNS addresses
How do you have the machine configured? DHCP? Manually? Static address with DHCP?
Grant
Problem began when I installed Mavericks.
I'm not quite sure about your suggestion about copying DNS addresses manually as "additional" addresses. That's exactly what I have to do each time I reboot, which is the problem. The only address that will persist between reboots is a 127.0.. address. I'm not sure where that comes from. Assigned by the OS, I guess. The others that I enter manually simply disappear when I reboot.
The Configure IPv4 field in Network Preferences is set to "Using DHCP". Do you think it would help to set it to a different option?
Thanks for your responses.
The problem appears to be some breakdown between your mac and the DNS server/DHCP server that gives you your IP address, your gateway and your DNS.
If you go to network CP —> advanced —> DNS and click + you should be able to add addresses. This allows you to add addresses besides the automatically assigned ones - for example for a corporate LAN. Put the ISP ones in that way and see if it persists - this way they are not coming from the ISP.
I would call the ISP. 10.6.8 has not changed in ages.
Grant
Whoa, Mavericks? This is the snow leopard discussion. Sorry, but that caught me by surprise.
Nonetheless, i have 10.9 on 3 machines and it works fine with various ISP and VPN configurations, DHCP or manual
Grant
Sorry, I guess I haven't made myself clear and the heading for Snow Leopard was something I hadn't noticed. The problem we're discussing is indeed a new problem for me with Mavericks.
Anyway. I've done exactly what you last suggested - added DNS addresses the way you outlined. Everything works fine until I reboot, then the DNS addresses simply disappear and I have to reenter them.
You can disable it on Mavericks using
networksetup -setv6off wi-fi
networksetup -setv6off ethernet
At this point the 'Off' item will start appearing in the IPv6 drop down list, in network prefs (like it did in SL)
HI Carpil,
to continue the same discussion i found following things on my Mavericks,
$ networksetup -listallnetworkservices
An asterisk (*) denotes that a network service is disabled.
Ethernet Adaptor (en3)
Wi-Fi
Bluetooth PAN
Thunderbolt Bridge
Ethernet Adaptor (en1)
Bluetooth DUN
$ networksetup -setv6off "Thunderbolt Bridge"
$ networksetup -setv6off "Bluetooth DUN"
$ networksetup -setv6off "Ethernet Adaptor (en1)"
$ networksetup -setv6off "Ethernet Adaptor (en3)"
$ networksetup -setv6off "Bluetooth PAN"
$ networksetup -setv6off "WI-Fi"
$ networksetup -listallnetworkservices
An asterisk (*) denotes that a network service is disabled.
Ethernet Adaptor (en3)
Wi-Fi
Bluetooth PAN
Thunderbolt Bridge
Ethernet Adaptor (en1)
Bluetooth DUN
why it is not switching it off
and also i can see ipv6 address ::1 and fe80:1::1 being present
and also when i run $ netstat -i ipv6 -gps
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
lo0 16384 <Link#1> 1155 0 1155 0 0
lo0 16384 localhost ::1 1155 - 1155 - -
lo0 16384 127 localhost 1155 - 1155 - -
lo0 16384 nikhils-mac fe80:1::1 1155 - 1155 - -
so I Was curious how to disable it, and why this command not executing after i give admin user password.
carpii wrote:
You can disable it on Mavericks using
networksetup -setv6off wi-fi
networksetup -setv6off ethernet
At this point the 'Off' item will start appearing in the IPv6 drop down list, in network prefs (like it did in SL)
I am not so up on these Mac command line commands ... is there a way to list what the current status is for this?
I am on El Capitan now though. I wanted to find a way to turn IPV6 off, and noticed that the off is not an option.
bruxxx wrote:
carpii wrote:
You can disable it on Mavericks using
networksetup -setv6off wi-fi
networksetup -setv6off ethernet
At this point the 'Off' item will start appearing in the IPv6 drop down list, in network prefs (like it did in SL)
I am not so up on these Mac command line commands ... is there a way to list what the current status is for this?
I am on El Capitan now though. I wanted to find a way to turn IPV6 off, and noticed that the off is not an option.
ifconfig # with it off
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 68:a8:6d:2d:5c:d4
inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255
nd6 options=1<PERFORMNUD>
media: autoselect
status: active
vs
ifconfig # with it link-local only
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 68:a8:6d:2d:5c:d4
inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255
inet6 fe80::6aa8:6dff:fe2d:5cd4%en1 prefixlen 64 scopeid 0x5
nd6 options=1<PERFORMNUD>
media: autoselect
status: active
Notice when it is link-local only, there is an inet6 line that does not appear when it is off.
There are most likely other ways.
Thanks BobHarris, that worked just as advertised.
Do you know the "get" command necessary to query this in networksetup, if there is one?
- hope i didn't break anything by turning ipv6 off.
bruxxx wrote:
Thanks BobHarris, that worked just as advertised.
Do you know the "get" command necessary to query this in networksetup, if there is one?
The closest I can find is
networksetup -getinfo Ethernet
networksetup -getinfo Wi-Fi
But you would have to play with different settings and see how the -getinfo changed to see if you could detect a pattern. The 'ifconfig' command seems to give more info than -getinfo, but that is just me.
- hope i didn't break anything by turning ipv6 off.
I do not know. At one time you could turn it off. It is possible that there are some inter-device services that are using an IPv6 protocol. This is all just a wild guess. Like between a Mac, an iPhone, an Apple TV, a Time Capsule, an Airport Extreme, Apple Watch, etc... Again just a wild guess.
I doubt anything related to surfing, email, software updates, etc... depend on IPv6.
I need to disable IPv6 in Mavericks.
