Package: isc-dhcp-client
Version: 4.4.1-2
Severity: important
Dear Maintainer,
dhclient failed to renew address or set routes for me. I found the following in
syslog:
Nov 24 19:08:41 orion dhclient[1840]: Can't allocate interface enx0015fflease
{#012 interface .
Nov 24 19:08:41 orion dhclient[1840]:
Nov 24 19:08:41 orion dhclient[1840]: If you think you have received this
message due to a bug rather
Nov 24 19:08:41 orion dhclient[1840]: than a configuration issue please read
the section on submitting
Nov 24 19:08:41 orion dhclient[1840]: bugs on either our web page at
www.isc.org or in the README file
Nov 24 19:08:41 orion dhclient[1840]: before submitting a bug. These pages
explain the proper
Nov 24 19:08:41 orion dhclient[1840]: process and the information we find
helpful for debugging.
Nov 24 19:08:41 orion dhclient[1840]:
Nov 24 19:08:41 orion dhclient[1840]: exiting.
I recognized the "enx0015ff..." string as part of the name that a USB LTE modem
I use gets, when it is attached to the system. It was not attached at the time
dhclient was failing to work.
So then I looked in /var/lib/dhcp/dhclient.leases and found this section:
lease {
interface "enx0015fflease {
interface "wls1";
fixed-address 172.16.0.70;
option subnet-mask 255.255.254.0;
option routers 172.16.0.1;
option dhcp-lease-time 86400;
option dhcp-option-overload 3;
option dhcp-message-type 5;
option domain-name-servers 172.16.0.1;
option dhcp-server-identifier 172.16.0.1;
renew 4 2019/11/21 08:00:31;
rebind 4 2019/11/21 18:23:18;
expire 4 2019/11/21 21:23:18;
}
which to me appears to have bad syntax in that the curly braces do not match
and there are two interface names specified for one lease block.
When I deleted this bad block, dhclient worked fine again.
I had not previously made any manual modifications to the dhclient.leases file.
Kind regards,
Michael Redman
-- System Information:
Debian Release: 10.2
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.19.0-6-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages isc-dhcp-client depends on:
ii debianutils 4.8.6.1
ii iproute2 4.20.0-2
ii libc6 2.28-10
ii libdns-export1104 1:9.11.5.P4+dfsg-5.1
ii libisc-export1100 1:9.11.5.P4+dfsg-5.1
Versions of packages isc-dhcp-client recommends:
ii isc-dhcp-common 4.4.1-2
Versions of packages isc-dhcp-client suggests:
ii avahi-autoipd 0.7-4+b1
pn isc-dhcp-client-ddns <none>
pn resolvconf <none>
-- no debconf information
