┌[swm@lamuella] [~]
└─╼$ nmcli connection down 'Kabelnetzwerkverbindung 1'
Connection 'Kabelnetzwerkverbindung 1' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/6)
┌[swm@lamuella] [~]
└─╼$ date="$(date --date='2015-04-18' '+%s')" && sudo sed -i "s/starts [0-9]\+;/starts $date;/" /var/lib/NetworkManager/dhclient6-e1ae4c0b-657b-4618-93a5-be25d555c02d-eth0.lease
[sudo] password for swm: 
┌[swm@lamuella] [~]
└─╼$ nmcli connection up 'Kabelnetzwerkverbindung 1'
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
┌[swm@lamuella] [~]
└─╼$ ip a show dev eth0
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether b8:70:f4:e0:18:bd brd ff:ff:ff:ff:ff:ff
    inet 131.234.11.235/26 brd 131.234.11.255 scope global dynamic eth0
       valid_lft 458sec preferred_lft 458sec
    inet6 2001:638:502:811:100:f8d5:2995:a69b/128 scope global dynamic 
       valid_lft 596sec preferred_lft 371sec
    inet6 fe80::ba70:f4ff:fee0:18bd/64 scope link 
       valid_lft forever preferred_lft forever
┌[swm@lamuella] [~]
└─╼$ pswuC dhclient 
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      4706  0.0  0.1  14768  9792 ?        S    20:40   0:00 /usr/bin/dhclient -d -q -sf /usr/lib/networkmanager/nm-dhcp-helper -pf /var/run/dhclient-eth0.pid -lf /var/lib/NetworkManager/dhclient-e1ae4c0b-657b-4618-93a5-be25d555c02d-eth0.lease -cf /var/lib/NetworkManager/dhclient-eth0.conf eth0
┌[swm@lamuella] [~]
└─╼$ sudo /usr/bin/dhclient -d -6 -N -sf /usr/lib/networkmanager/nm-dhcp-helper -pf /var/run/dhclient6-eth0.pid -lf /var/lib/NetworkManager/dhclient6-e1ae4c0b-657b-4618-93a5-be25d555c02d-eth0.lease -cf /var/lib/NetworkManager/dhclient6-eth0.conf.nm-bak eth0
Internet Systems Consortium DHCP Client 4.3.2
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
PRC: Confirming active lease (INIT-REBOOT).
XMT: Forming Confirm, 0 ms elapsed.
XMT:  X-- IA_NA f4:e0:18:bd
XMT:  | X-- Confirm Address 2001:638:502:811:100:f8d5:2995:a69b
XMT:  V IA_NA appended.
XMT: Confirm on eth0, interval 960ms.
RCV: Reply message on eth0 from fe80::212:3fff:fe42:12f4.
RCV:  X-- Server ID: 00:01:00:01:1c:80:b1:b4:00:12:3f:42:12:f4
message status code Success: "All addresses still on link."
PRC: Bound to lease 00:01:00:01:1c:80:b1:b4:00:12:3f:42:12:f4.
PRC: Rebind event scheduled in -160415 seconds, to run for 150 seconds.
PRC: Depreference scheduled in -160490 seconds.
PRC: Expiration scheduled in -160265 seconds.
PRC: Rebinding lease on eth0.
PRC: Depreference scheduled in -160490 seconds.
PRC: Expiration scheduled in -160265 seconds.
PRC: Address 2001:638:502:811:100:f8d5:2995:a69b depreferred.
PRC: Expiration scheduled in -160265 seconds.
PRC: Address 2001:638:502:811:100:f8d5:2995:a69b expired.
PRC: Bound lease is devoid of active addresses.  Re-initializing.
PRC: Soliciting for leases (INIT).
XMT: Forming Solicit, 0 ms elapsed.
XMT:  X-- IA_NA f4:e0:18:bd
XMT:  | X-- Request renew in  +3600
XMT:  | X-- Request rebind in +5400
XMT: Solicit on eth0, interval 1020ms.
RCV: Advertise message on eth0 from fe80::212:3fff:fe42:12f4.
RCV:  X-- IA_NA f4:e0:18:bd
RCV:  | X-- starts 1429468867
RCV:  | X-- t1 - renew  +0
RCV:  | X-- t2 - rebind +0
RCV:  | X-- [Options]
RCV:  | | X-- IAADDR 2001:638:502:811:100:f8d5:2995:a69b
RCV:  | | | X-- Preferred lifetime 375.
RCV:  | | | X-- Max lifetime 600.
RCV:  X-- Server ID: 00:01:00:01:1c:80:b1:b4:00:12:3f:42:12:f4
RCV:  Advertisement recorded.
PRC: Selecting best advertised lease.
PRC: Considering best lease.
PRC:  X-- Initial candidate 00:01:00:01:1c:80:b1:b4:00:12:3f:42:12:f4 (s: 154, p: 0).
XMT: Forming Request, 0 ms elapsed.
XMT:  X-- IA_NA f4:e0:18:bd
XMT:  | X-- Requested renew  +3600
XMT:  | X-- Requested rebind +5400
XMT:  | | X-- IAADDR 2001:638:502:811:100:f8d5:2995:a69b
XMT:  | | | X-- Preferred lifetime +7200
XMT:  | | | X-- Max lifetime +7500
XMT:  V IA_NA appended.
XMT: Request on eth0, interval 1050ms.
RCV: Reply message on eth0 from fe80::212:3fff:fe42:12f4.
RCV:  X-- IA_NA f4:e0:18:bd
RCV:  | X-- starts 1429468867
RCV:  | X-- t1 - renew  +0
RCV:  | X-- t2 - rebind +0
RCV:  | X-- [Options]
RCV:  | | X-- IAADDR 2001:638:502:811:100:f8d5:2995:a69b
RCV:  | | | X-- Preferred lifetime 375.
RCV:  | | | X-- Max lifetime 600.
RCV:  X-- Server ID: 00:01:00:01:1c:80:b1:b4:00:12:3f:42:12:f4
PRC: Bound to lease 00:01:00:01:1c:80:b1:b4:00:12:3f:42:12:f4.
PRC: Renewal event scheduled in 300 seconds, to run for 150 seconds.
PRC: Depreference scheduled in 375 seconds.
PRC: Expiration scheduled in 600 seconds.
^C
