Stefan, I think the answer is yes. Just a few minutes before my lease was going to expire, I did: "sudo dhclient enp4s0" However, I didn't notice any change in the leases file, so I expected internet it to stop working after the expire time, but it didn't stop working. So I looked at my tcpdump captures and realized that the lease was granted, it just didn't update the leases file.
I never killed anything first, and dhclient is still running... Oh, crap, I see I now have a bunch of dhclients running. doug@DOUG-64:~$ ps aux | grep dhcl root 1049 0.0 0.0 181364 2808 ? Ss Feb29 0:00 /sbin/dhclient -1 -v -pf /run/dhclient.enp4s0.pid -lf /var/lib/dhcp/dhclient.enp4s0.leases -I -df /var/lib/dhcp/dhclient6.enp4s0.leases enp4s0 root 7008 0.0 0.0 181364 2796 ? Ss 07:34 0:00 dhclient enp4s0 root 7368 0.0 0.0 181364 2744 ? Ss 08:01 0:00 dhclient enp4s0 root 7616 0.0 0.0 181364 2688 ? Ss 08:36 0:00 dhclient enp4s0 root 7810 0.0 0.0 181364 2816 ? Ss 08:36 0:00 dhclient enp4s0 I was just trying to avoid having a gap in internet access. I don't really want to do the ifdown && ifup method if I can avoid it. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1551351 Title: dhclient does not renew leases Status in isc-dhcp package in Ubuntu: Confirmed Status in isc-dhcp source package in Xenial: Confirmed Bug description: Release: Xenial I think this only recently started after some bind9 updates triggered a rebuild. When booting dhclient gets started and acquires an IP address, but it does seem to lock up somewhere as it does not renew the lease. In my environment I set the lease time to 5 minutes, so I notice such things rather soon. I looked on the dhcp server side but saw any further dhcp messages come in from the client side. Related bugs: * bug 1551415: systemctl stop networking hang / timeout ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: isc-dhcp-client 4.3.3-5ubuntu8 ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3 Uname: Linux 4.4.0-9-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 Date: Mon Feb 29 12:32:52 2016 DhclientLeases: SourcePackage: isc-dhcp UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1551351/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
