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solstice

Member

Registered: 2006-10-27

Posts: 239

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2 interfaces, resolvconf and systemd-resolve

hi,

I have 2 interfaces.
wlan0 is setup by netctl-auto (dhcp), 192.168.2.13/28, gw 192.168.2.1, nameserver 192.168.2.1

then I setup manually wlan1.
I run

wpa_supplicant -B -i wlan1 -c <(wpa_passphrase mySSID myPassphrase)
dhcpcd wlan1

wlan1 got 192.168.1.13 ip, gw 192.168.1.1, nameserver 192.168.1.1

I remove the default route to 192.68.2.0 network to keep the one to 192.168.1.0

ip route del default via 192.168.2.1

and also remove the DNS from wlan0 with

resolvconf -d wlan0.dhcp

then resolvconf -l gives me as expected

# resolv.conf from wlan1.dhcp
nameserver 192.168.1.1

it's the content of /etc/resolv.conf also

but I am unable to resolve name
I had to use

systemd-resolve --set-dns=192.168.1.1 -i wlan1

Why ?

Last edited by solstice (2018-04-28 19:52:07)

gerdesj

Member

Registered: 2016-04-17

Posts: 16

Re: 2 interfaces, resolvconf and systemd-resolve

You have two default gateways.  There can only be one unless you know what you are doing (eg manipulate "metric")

Have a look at the output of:

$ cat /etc/resolv.conf
$ ip a
$ ip r

... and think carefully about what "default via" means.