Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
Q: How to avoid starting network interfaces on boot?
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Networking & Security
View previous topic :: View next topic  
Author Message
Silmano
n00b
n00b


Joined: 10 Mar 2012
Posts: 59

PostPosted: Thu Oct 30, 2014 9:22 am    Post subject: Q: How to avoid starting network interfaces on boot? Reply with quote

I'm reinstalling Gentoo on my laptop and I'm finding a weird behaviour when configuring my network. The laptop has both wired and wireless networking configured in /etc/conf.d/net like the following:
Code:
# Ethernet
config_enp5s0="192.168.1.120 netmask 255.255.255.0"
routes_enp5s0="default via 192.168.1.1"

# WiFi
modules_wlp3s0="wpa_supplicant"
config_wlp3s0="dhcp"


I don't have net.enp5s0 nor net.wlp3s0 included in any runlevel (I have the links from net.lo created), since I usually move the laptop around and I'll like to start the interface myself. The problem I'm finding is that both enp5s0 and wlp3s0 are getting dhcp addresses at boot (and since I don't have the wpa_supplicant fully configured yet, the wifi is getting an invalid IP)
Code:
-> % ifconfig
enp5s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.208  netmask 255.255.255.0  broadcast 192.168.1.255
        ether e8:11:32:17:81:30  txqueuelen 1000  (Ethernet)
        RX packets 1761  bytes 157798 (154.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1340  bytes 265914 (259.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 0  (Local Loopback)
        RX packets 154  bytes 12196 (11.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 154  bytes 12196 (11.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp3s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 169.254.208.124  netmask 255.255.0.0  broadcast 169.254.255.255
        ether 00:1b:b1:f0:9c:bf  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


And the different run level list:
Code:
-> % rc-update
                acpid |      default
             bootmisc | boot
                devfs |                       sysinit
                dmesg |                       sysinit
                 fsck | boot
             hostname | boot
              hwclock | boot
              keymaps | boot
            killprocs |              shutdown
    kmod-static-nodes |                       sysinit
                local |      default
           localmount | boot
             loopback | boot
              metalog |      default
              modules | boot
             mount-ro |              shutdown
                 mtab | boot
             netmount |      default
                 ntpd |      default
               procfs | boot
                 root | boot
            savecache |              shutdown
                 sshd |      default
                 swap | boot
            swapfiles | boot
               sysctl | boot
                sysfs |                       sysinit
         termencoding | boot
         tmpfiles.dev |                       sysinit
       tmpfiles.setup | boot
                 udev |                       sysinit
           udev-mount |                       sysinit
              urandom | boot
                  xdm |      default


Since I installed yesterday almost half of the installed packages, I don't really know if its because I modified any configuration file or because there's a package that is making the networks start without knowing it.

Is there any way to keep the IP configuration for both interfaces but tell Gentoo not to start them at boot (just start net.lo if needed)?
Back to top
View user's profile Send private message
charles17
Advocate
Advocate


Joined: 02 Mar 2008
Posts: 2583

PostPosted: Thu Oct 30, 2014 9:29 am    Post subject: Reply with quote

Would the solution of https://forums.gentoo.org/viewtopic-t-1002390-highlight-.html help?

For the services started please check
Quote:
$ rc-config show all
Back to top
View user's profile Send private message
Silmano
n00b
n00b


Joined: 10 Mar 2012
Posts: 59

PostPosted: Thu Oct 30, 2014 10:20 am    Post subject: Reply with quote

I think the problem is net-misc/dhcpcd. I've deleted net.wlp3s0 link and deleted its configuration from /etc/conf.d/net, but its still being started:
Code:
Oct 30 11:14:41 [dhcpcd] version 6.4.7 starting
Oct 30 11:14:41 [dhcpcd] dev: loaded udev
Oct 30 11:14:41 [dhcpcd] wlp3s0: starting wpa_supplicant
Oct 30 11:14:42 [dhcpcd] no interfaces have a carrier
Oct 30 11:14:42 [dhcpcd] forked to background, child pid 1697
Oct 30 11:14:42 [dhcpcd] wlp3s0: waiting for carrier
Oct 30 11:14:42 [dhcpcd] enp5s0: waiting for carrier
Oct 30 11:14:42 [dhcpcd] wlp3s0: carrier acquired
Oct 30 11:14:42 [dhcpcd] DUID 00:01:00:01:1b:e3:be:00:00:1b:b1:f0:9c:bf
Oct 30 11:14:42 [dhcpcd] wlp3s0: IAID b1:f0:9c:bf
Oct 30 11:14:42 [dhcpcd] wlp3s0: carrier lost
Oct 30 11:14:47 [dhcpcd] enp5s0: carrier acquired
Oct 30 11:14:47 [dhcpcd] enp5s0: IAID 32:17:81:30
Oct 30 11:14:47 [dhcpcd] enp5s0: rebinding lease of 192.168.1.208
Oct 30 11:14:48 [dhcpcd] wlp3s0: using IPv4LL address 169.254.208.124
Oct 30 11:14:48 [dhcpcd] wlp3s0: adding route to 169.254.0.0/16
Oct 30 11:14:52 [dhcpcd] wlp3s0: soliciting a DHCP lease
Oct 30 11:14:53 [dhcpcd] enp5s0: leased 192.168.1.208 for 86400 seconds
Oct 30 11:14:53 [dhcpcd] enp5s0: adding route to 192.168.1.0/24
Oct 30 11:14:53 [dhcpcd] enp5s0: adding default route via 192.168.1.10


How do I tell net-misc/dhcpcd to avoid overwritting net.enp5s0 IP configuration?

EDIT: Why does net-misc/dhcpcd by-pass init.d scripts now? I've been reading the wiki (http://wiki.gentoo.org/wiki/Network_management_using_DHCPCD) and it now seems net-misc/dhcpcd is the boss of the networks right now and will start them despite your init.d scripts. I've edited my /etc/dhcpcd.conf adding enp5s0 configuration and now it gets the static address.

Its been a while since I last configured this laptop, but any idea why net-misc/dhcpcd bypasses all configuration files and just reads its own? Any suitable alternative to just regain control of the interfaces via /etc/conf.d/net and init.d scripts?
Back to top
View user's profile Send private message
charles17
Advocate
Advocate


Joined: 02 Mar 2008
Posts: 2583

PostPosted: Thu Oct 30, 2014 10:43 am    Post subject: Reply with quote

Settings in /etc/conf.d/net are only relevant for Gentoo net.* scripts, regardless if started manually or from the runlevel.
Once you start /etc/init.d/dhcpcd then only /etc/dhcpcd.conf is relevant. https://wiki.gentoo.org/wiki/Network_management_using_DHCPCD#Migration_from_Gentoo_net..2A_scripts

You'd better decide for only one network manager. Either dhcpcd or netifrc (Gentoo net.* scripts).
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Networking & Security All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum