Better yet, have dhclient retry that bind call itself, at least for a short while, before throwing an error.
-- 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/1447715 Title: dhclient -6: Can't bind to dhcp address: Cannot assign requested address Status in DHCP: New Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading to Ubuntu 15.04 my computer is unable to obtain an IPv6 address via DHCPv6. The root cause is that dhclient is exiting with the following message: ----------------------------------------------------- Can't bind to dhcp address: Cannot assign requested address Please make sure there is no other dhcp server running and that there's no entry for dhcp or bootp in /etc/inetd.conf. Also make sure you are not running HP JetAdmin software, which includes a bootp server. If you think you have received this message due to a bug rather than a configuration issue please read the section on submitting bugs on either our web page at www.isc.org or in the README file before submitting a bug. These pages explain the proper process and the information we find helpful for debugging.. exiting. ----------------------------------------------------- The problem seems to exist in isc-dhcp-client 4.3.1-5ubuntu2 (15.04 version) because downgrading to isc-dhcp-client 4.2.4-7ubuntu14 (14.10 version) allows me to obtain an address. NetworkManager is the one launching dhclient. The two invocations (one for IPv4 and one for IPv6) are: dhclient_start(): running: /sbin/dhclient -d -q -sf /usr/lib/NetworkManager/nm-dhcp-helper -pf /run/sendsigs.omit.d /network-manager.dhclient-eth0.pid -lf /var/lib/NetworkManager /dhclient-c0a3dfde-5c0b-4cef-9c3b-563cfb1fb9d2-eth0.lease -cf /var/lib/NetworkManager/dhclient-eth0.conf eth0 dhclient_start(): running: /sbin/dhclient -d -q -6 -N -sf /usr/lib/NetworkManager/nm-dhcp-helper -pf /run/sendsigs.omit.d /network-manager.dhclient6-eth0.pid -lf /var/lib/NetworkManager/dhclient6-c0a3dfde-5c0b-4cef-9c3b- 563cfb1fb9d2-eth0.lease -cf /var/lib/NetworkManager/dhclient6-eth0.conf eth0 I do not see anything suspicious with the way both dhclients are invoked. Given that a downgrade allows me to obtain an IPv6 address I think this might be a bug in the ISC DHCP client rather than in NetworkManager. To manage notifications about this bug go to: https://bugs.launchpad.net/dhcp/+bug/1447715/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
