Question

1

How to check my ip is static or dhcp

rated 0 times [ 1] [ 0] / answers: 1 / hits: 2497 / 3 Years ago, tue, august 10, 2021, 1:39:52

When I run more interfaces I get

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).



source /etc/network/interfaces.d/*



# The loopback network interface

auto lo

iface lo inet loopback

I am on wifi. How to konw my ip is static or dynamic? When run ip addr I get

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: enp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000

    link/ether e0:d5:5e:78:64:ef brd ff:ff:ff:ff:ff:ff

3: wlx00e02d051a2d: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000

    link/ether 00:e0:2d:05:1a:2d brd ff:ff:ff:ff:ff:ff

    inet 192.168.43.87/24 brd 192.168.43.255 scope global dynamic noprefixroute wlx00e02d051a2d

       valid_lft 2283sec preferred_lft 2283sec

    inet6 2401:4900:4c6a:ba87:2348:3cc3:5ff9:337/64 scope global noprefixroute 

       valid_lft forever preferred_lft forever

    inet6 fe80::5cde:b91:60ef:2ee1/64 scope link noprefixroute 

       valid_lft forever preferred_lft forever

I think ipv4 is dynamic, what about ipv6? Is it static?

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overine

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answered 3 Years ago eryeath · Accepted Answer

If you run ip addr from a terminal window the output should tell you. The line that starts with inet in the output will tell you. Dynamic will say but Static will be blank. Plus, the line containing valid_lft and preferred_lft will show time remaining if dynamic. I have put some examples below.

DHCP or Dynamic IP Address:

$ ip addr

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000

    link/ether 40:8d:5c:4f:12:03 brd ff:ff:ff:ff:ff:ff

    altname enp3s0

    inet 10.0.0.100/24 brd 10.0.0.255 scope global dynamic noprefixroute eth0

       valid_lft 28899sec preferred_lft 28899sec

Static IP Address:

$ ip addr

4: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000

    link/ether bc:5f:f4:79:66:fe brd ff:ff:ff:ff:ff:ff

    inet 10.0.0.220/24 brd 10.0.0.255 scope global bond0

       valid_lft forever preferred_lft forever

Hope this helps!