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Troubleshooting Question

Ubuntu cannot ping its neighbor

Last Modified: 2020-10-16

I am new to Ubuntu. An Ubuntu device is connected to a router with same ip subnet, but it cannot ping the router and then I noticed it cannot ping itself too. It looks like it does not have ip address on it. Please see the below. Do you think so? if so, can you give suggestion or share a link how to add ip address on the interface? Thank you

root@NetworkAutomation-1:~# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::58bb:7dff:fe82:ac8a  prefixlen 64  scopeid 0x20<link>
        ether 5a:bb:7d:82:ac:8a  txqueuelen 1000  (Ethernet)
        RX packets 100  bytes 9979 (9.9 KB)
        RX errors 0  dropped 93  overruns 0  frame 0
        TX packets 15  bytes 1146 (1.1 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet  netmask
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 96  bytes 7264 (7.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 96  bytes 7264 (7.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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