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roboto
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Joined: 15 Feb 2017
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Location: My IP address.
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 Posted: Wed Sep 06, 2017 1:33 am Post subject: [SOLVED] dhcpcd not working for IPv6 |
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I followed the dhcp set up instructions step by step in the Gentoo Handbook.
I rebooted and it did the dhcp method for IPv6, instead of IPv4.
So I couldn't connect to the internet.
The kernel .config:
https://paste.pound-python.org/show/AMTDQG6cuwcXCMGdAr2/
rc.log for my dhcpcd output: https://paste.pound-python.org/show/NfcWUPNlmuelPPh4vzZr/
Is there any way I can just use IPv4 instead of IPv6?
dhcp in portage is set to version 4, instead of 6, which is stupid.
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Answers please.
The true hater of man expects nothing from him and is indiscriminate to his works.
-Ayn Rand
| Quote: | | Dude. Minus 30 credibility points. |
Yep
Last edited by roboto on Sun Sep 10, 2017 1:13 am; edited 1 time in total |
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Maxxx
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Location: Italia
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| Posted: Wed Sep 06, 2017 10:06 am Post subject: |
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I don't be able to open your kernel config:
https://paste.pound-python.org/show/AMTDQG6cuwcXCMGdAr2/
Maybe you must enable IPV4 and disable IPV6.
I disabled IPV6 in my kernel and now i have only IPV4.
Furthermore, posting /etc/conf.d/net file would be usefull |
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roboto
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| Posted: Wed Sep 06, 2017 9:17 pm Post subject: |
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I'm not sure on how you disable IPv6 and enable IPv4, considering there's no "CONFIG_IPV4" option. Only CONFIG_IPV6
/etc/conf.d/net:
config_enp2s0="dhcp"
.config: https://paste.pound-python.org/show/RFWeJ5XgBA4N4mMAy1j5
_________________
Answers please.
The true hater of man expects nothing from him and is indiscriminate to his works.
-Ayn Rand
| Quote: | | Dude. Minus 30 credibility points. |
Yep |
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roboto
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Location: My IP address.
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| Posted: Wed Sep 06, 2017 9:41 pm Post subject: |
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I disabled IPv6 entirely just now in my .config and dhcpcd still uses IPv6 addresses. Its output this boot was slightly different.
https://paste.pound-python.org/show/gb8oykgF6RVRsHVfguD8
_________________
Answers please.
The true hater of man expects nothing from him and is indiscriminate to his works.
-Ayn Rand
| Quote: | | Dude. Minus 30 credibility points. |
Yep |
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Hu
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Joined: 06 Mar 2007
Posts: 21595
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| Posted: Thu Sep 07, 2017 12:45 am Post subject: |
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Normally, an IPv6-enabled system will also configure an IPv4 address. This is necessary because key parts of the Internet (in particular, residential ISPs) are years behind on their IPv6 deployment, so trying to run an IPv6 only stack is painful. Please explain why you believe you had only an IPv6 address.
| roboto wrote: | | dhcp in portage is set to version 4, instead of 6, which is stupid. |
Please explain this statement. The DHCP server package version in Portage is version 4. The DHCPCD (client) package in Portage is version 6. Neither of these has any bearing on what IP versions are supported.
| roboto wrote: | | I disabled IPv6 entirely just now in my .config and dhcpcd still uses IPv6 addresses. Its output this boot was slightly different. |
That log appears to cover several reboots, including ones from Tuesday, the day before your post. You did not indicate your local time at the time of the post, so we must guess which log entries were made with your IPv6-disabled kernel. I see one boot at 16:22 that tried to use IPv6. I see another boot at 16:33 that did not. |
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Maxxx
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| Posted: Thu Sep 07, 2017 8:07 am Post subject: |
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What's the output of
In this output, there should be "inet" line which means IPV4 while "inet6" means IPV6.
If you have "inet" line, your IPV4 is active and loaded from kernel.
For example, i disabled ipv6 directly in kernel and i haven't "inet6" line. |
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UberLord
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Joined: 18 Sep 2003
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Ant P.
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| Posted: Fri Sep 08, 2017 9:24 pm Post subject: |
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| UberLord wrote: | | Quote: | | dhcp_open: enp2s0: Address family not supported by protocol |
Oh dear, looks like AF_PACKET aka the Packet Filter isn't enabled in your kernel config.
| Quote: | | # CONFIG_PACKET is not set |
Yup, I was right :) |
Maybe nitpicking, but shouldn't all the dhcp client packages be using linux-info.eclass to check for that? |
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UberLord
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Hu
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| Posted: Sat Sep 09, 2017 12:40 am Post subject: |
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While that warning could be useful, remember that not all systems even have a kernel configuration available when the DHCP client is built, so the test needs to be optional. I have a bit of a sore point about the linux-info.eclass functions from a few years ago when packages kept needlessly dying because, while my kernel was configured correctly, they couldn't prove it, so they aborted.
Also, even when the configuration is available and shows AF_PACKET support, there's no guarantee that the package will be run on a well-configured system, only that the current build host is well-configured. |
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UberLord
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| Posted: Sat Sep 09, 2017 8:12 am Post subject: |
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| Hu wrote: | | I have a bit of a sore point about the linux-info.eclass functions from a few years ago when packages kept needlessly dying because, while my kernel was configured correctly, they couldn't prove it, so they aborted. |
That is truely nefarious!
It should just be a warning at most because it's not API/ABI breaking, just a runtime requirement and guess what - dhcpcd keeps running regardless because other protocols might just work.
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Use dhcpcd for all your automated network configuration needs
Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool |
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roboto
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| Posted: Sun Sep 10, 2017 1:12 am Post subject: |
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Enabling AF_PACKET solved my issue, dhcpcd now uses IPv6.
Thank you all very much.
_________________
Answers please.
The true hater of man expects nothing from him and is indiscriminate to his works.
-Ayn Rand
| Quote: | | Dude. Minus 30 credibility points. |
Yep |
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UberLord
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roboto
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| Posted: Sun Sep 10, 2017 1:23 am Post subject: |
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Oops, I meant to say IPv4, sorry.
_________________
Answers please.
The true hater of man expects nothing from him and is indiscriminate to his works.
-Ayn Rand
| Quote: | | Dude. Minus 30 credibility points. |
Yep |
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