** Description changed: Platform: Qemu/libvirt on AMD64 Ubuntu version: 20.04 isc-dhcp-client version: 4.4.1-2.1ubuntu5 Problem: When dhclient is used during boot every few reboots the DHCP OFFER packets aren't pushed from the kernel to dhclient. The DISCOVER packets can be seen in strace and tcpdump. The OFFER packets can be seen in tcpdump, but no read event is triggered. Ubuntu 18.04 doesn't have the problem, neither does Debian 10. Building these dhclient versions on Ubuntu 20.04 alleviates the problem a little, but it still occurs. So this issue might also be kernel related. Attached diff shows a strace of all threads and a pcap showing the tcpdump output. + + Edit: + - Sometimes the dhclient command does receive the OFFER packet and connection is restored. + - In my testing running dhclient manually from the terminal when the OFFERs aren't received will result in a new dhclient session which does receive the OFFER packet and connection is restored.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926139 Title: dhclient doesn't receive dhcp offer from kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1926139/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
