Arch Linux

gardenair

Member

Registered: 2021-08-17

Posts: 42

[SOLVED] Static IP, Internet not working.

I have installed Arch Linux on the laptop. At the start of the installation, I use "iwctl" command and at the end of the installation I also install " netctl ".

Now I plug my wired cable in my LAN port and try to use it. Prior I was using Windows 10 on the same machine with the following Static IP address

IP 10.1.81.250
Subnet mask 255.255.255.0
GateWay 10.1.81.1
DNS 8.8.8.8

In my Arch Linux, I use the command

[root@testpc ~]# ip address add 10.1.81.250/24 broadcast + dev eno1

Then I use ip addr command

[root@testpc ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 0f:1f:bf:22:b4:e0 brd ff:ff:ff:ff:ff:ff
    altname enp0s25
    inet 10.1.81.250/24 brd 10.1.81.255 scope global eno1
       valid_lft forever preferred_lft forever
3: wlp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether e6:23:09:35:f7:51 brd ff:ff:ff:ff:ff:ff permaddr 87:3b:1b:14:16:c5

Then I try to ping my gateway which was successfully done.

[root@testpc ~]# ping 10.1.81.1
PING 10.1.81.1 (10.1.81.1) 56(84) bytes of data.
64 bytes from 10.1.81.1: icmp_seq=1 ttl=255 time=3.19 ms
64 bytes from 10.1.81.1: icmp_seq=2 ttl=255 time=1.15 ms
64 bytes from 10.1.81.1: icmp_seq=3 ttl=255 time=1.15 ms
64 bytes from 10.1.81.1: icmp_seq=4 ttl=255 time=0.867 ms
64 bytes from 10.1.81.1: icmp_seq=5 ttl=255 time=1.08 ms

There is another computer on the same network which I can also ping.

[root@testpc ~]# ping 10.1.81.249
PING 10.1.81.249 (10.1.81.249) 56(84) bytes of data.
64 bytes from 10.1.81.249: icmp_seq=1 ttl=64 time=0.910 ms
64 bytes from 10.1.81.249: icmp_seq=2 ttl=64 time=0.245 ms
64 bytes from 10.1.81.249: icmp_seq=3 ttl=64 time=0.256 ms
64 bytes from 10.1.81.249: icmp_seq=4 ttl=64 time=0.583 ms
64 bytes from 10.1.81.249: icmp_seq=5 ttl=64 time=0.643 ms
64 bytes from 10.1.81.249: icmp_seq=6 ttl=64 time=0.368 ms
^C
--- 10.1.81.249 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5060ms
rtt min/avg/max/mdev = 0.245/0.500/0.910/0.237 ms
[root@testpc ~]#

The following command shows the output.

[root@testpc ~]# ip route
10.1.81.0/24 dev eno1 proto kernel scope link src 10.1.81.250
[root@testpc ~]# ip link show dev eno1
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 0f:1f:bf:22:b4:e0 brd ff:ff:ff:ff:ff:ff
    altname enp0s25
[root@testpc ~]#

In the  /etc/resolv.conf file I also add nameserver  8.8.8.8 The issue is the machine can not ping any site  even 8.8.8.8
My internet is not working. Kindly guide me on where I am doing mistake on how may I fix the issue.

Last edited by gardenair (2021-09-15 09:58:02)

Raynman

Member

Registered: 2011-10-22

Posts: 1,539

Re: [SOLVED] Static IP, Internet not working.

You haven't added your gateway. You only have one entry in the routing table for 10.1.81.0/24. You need to add a route for hosts outside your network segment:

ip route add default via 10.1.81.1 dev eno1

Or, since you mentioned netctl: https://wiki.archlinux.org/title/Netctl … e_profiles

gardenair

Member

Registered: 2021-08-17

Posts: 42

Re: [SOLVED] Static IP, Internet not working.

Well thanks for guiding me.  Appreciate you give me a hint . Well, it means that assigning an IP address to a machine is the 1st step i.e

[root@testpc ~]# ip address add 10.1.81.250/24 broadcast + dev eno1

then

the second command will be to add a route.

[root@testpc ~]# ip route add default via 10.1.81.1 dev eno1
here what default means?

and the 3rd thing will be to add the DNS inside /etc/resolv.conf file which I have already added

Concluding this means there are three steps for it.

1- ip address add
2- ip route add
3- /etc/resolv.conf

So with the combination of these three steps the machine can talk with the rest of the world?  am I right?

Last edited by gardenair (2021-09-08 18:22:28)

Raynman

Member

Registered: 2011-10-22

Posts: 1,539

Re: [SOLVED] Static IP, Internet not working.

Correct, those are also the three steps listed in Network_configuration#Static_IP_address.

#Check_the_connection adds two more steps to the beginning, closer to the hardware.

Edit: the default route is also covered there: https://wiki.archlinux.org/title/Networ … ting_table

Last edited by Raynman (2021-09-08 18:28:52)

gardenair

Member

Registered: 2021-08-17

Posts: 42

Re: [SOLVED] Static IP, Internet not working.

Thanks for your guidance. I have successfully connect my Arch Linux machine. Now
I also use systemd method to connect it.Following are the steps.

root@testpc ~]# cd /etc/systemd/network
[root@testpc network]# touch eno1.network

root@testpc ~]# vim /etc/systemd/network/eno1.network

[Math]
Name=eno1

[Network]
Address=10.1.81.250/24
Gateway=10.1.81.1
DNS=8.8.8.8

[root@testpc ~]#  systemctl start systemd-networkd
[root@testpc ~]#  systemctl enable systemd-networkd

Now i can ping 8.8.8.8 successfully. One thing I want to ask that i am using XFCE desktop environment on my Arch system. To  see my Network Connection on system tray I run

[root@testpc ~]#  pacman -S network-manager-applet
then
[root@testpc ~]# nm-applet
I shows the Network Icon but as I press "Ctrl + z" the icon disappear. How may I  keep the connect  permanent on my system tray ?

Thanks in advance.

Last edited by gardenair (2021-09-15 05:36:23)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,935

Re: [SOLVED] Static IP, Internet not working.

If that's what you want to use you should disable and stop systemd-networkd and start and enable NetworkManager instead and configure the connection in a networkmanager tool. And see: https://wiki.archlinux.org/title/Networ … rt_to_DHCP

You mentioned 4 different networking tools over the course of this thread, this can lead to all sorts of issues. Decide for one if you want system tray integration the only real choice you have is NetworkManager, make sure everything else, systemd-networkd, iwd, netctl have to be disabled for this to work properly.

As for keeping it running, add the nm-applet to your session/DE autostart would be simplest, but if you want to keep it running from within a terminal you can add a &

nm-applet &

Last edited by V1del (2021-09-15 06:15:20)

gardenair

Member

Registered: 2021-08-17

Posts: 42

Re: [SOLVED] Static IP, Internet not working.

Thanks a lot for guiding me.Appreciate it.