I got a Ubuntu Server 16.04 LTs, it's a VM on a ESX (VMware). This server was in dhcp config and it worked fine until today. (I know a server should be in static address but in my case, i don't really need to be static). Today, I restarted the server (the VM) and there is not more IPv4 for the server, only a IPv6.
I didn't change anything in the config, i will show you the differents files/configs that I think is usefull, if you need more just ask.
/etc/hosts
127.0.0.1 localhost
127.0.1.1 my_hostname
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
/etc/hostname
my_hostname
/etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
output from ifconfig
command
eth0 Link encap:Ethernet HWaddr 00:50:56:94:d1:ae
adr inet6: fe80::250:56ff:fe94:d1ae/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:68852 erreurs:0 :0 overruns:0 frame:0
TX packets:1120 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:5658008 (5.6 MB) Octets transmis:329017 (329.0 KB)
lo Link encap:Boucle locale
inet adr:127.0.0.1 Masque:255.0.0.0
adr inet6: ::1/128 Scope:Hôte
UP LOOPBACK RUNNING MTU:65536 Metric:1
Packets reçus:26990 erreurs:0 :0 overruns:0 frame:0
TX packets:26990 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1
Octets reçus:1997350 (1.9 MB) Octets transmis:1997350 (1.9 MB)
I try to release IPv4 dhclient -4 -r -v
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/eth0/00:50:56:94:d1:ae
Sending on LPF/eth0/00:50:56:94:d1:ae
Sending on Socket/fallback
same for IPv6 dhclient -6 -r -v
Removed stale PID file
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on Socket/eth0
Sending on Socket/eth0
**And it block here**
I also tried to ask a nex IP after dhclient -4 -v
DHCPDISCOVER on eth0 to 255.255.255.255 port 67
...
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
I know the IP address of the DHCP server, so I specified it, dhclient -4 -v -s IP_ADDRESS_DHCP_SERVER
DHCPDISCOVER on eth0 to IP_ADDRESS_DHCP_SERVER port 67
...
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
I don't know what to do any more, I tried to disable IPv6 but I just don't get any IP after that. I don't get it, it worked fine yesterday...
If you have an idea, I take it !
Thanks