LinuxQuestions.org - [SOLVED] The network is not up

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The network is not up

Hello,
My Debian box has three NICs:

Code:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: Client: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000

    link/ether 34:60:f9:cc:2e:8b brd ff:ff:ff:ff:ff:ff

3: Server: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000

    link/ether 34:60:f9:d4:92:06 brd ff:ff:ff:ff:ff:ff

4: Control: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000

    link/ether 08:62:66:c8:c3:e8 brd ff:ff:ff:ff:ff:ff

    altname enp0s25

I want to manually set the IP address of the NIC named Control. I added the following lines to the interfaces file:

Code:

auto Control

iface Control inet static

address 172.21.50.28

netmask 255.255.255.128

broadcast 172.21.50.127

After it, the network is not up.

Thank you.

debian uses network manager to configure networking. To use the interfaces file you need to stop/disable network manager and start/enable networking service.

You can configure static ip settings with network manager using the utility nmcli or via its desktop applet.

I guess it won't work without gateway, but you know what are you doing.

Quote:

Originally Posted by pan64 (Post 6466155)

I guess it won't work without gateway, but you know what are you doing.

Hello,
Thank you so much for your reply.
I added a gateway and did:

Code:

# systemctl restart networking

But, I got an error.

Quote:

Originally Posted by Jason.nix (Post 6466507)

Hello,
Thank you so much for your reply.
I added a gateway and did:

Code:

# systemctl restart networking

But, I got an error.

Show the error here

Hello,
Thank you so much for all replies.
I just did a restart and problem solved.