Package: ifupdown
Version: 0.8.19
Severity: normal
* Steps to reproduce:
1. Configure interface with a static ipv6 address
# cat /etc/network/interfaces.d/eth1
auto eth1
iface eth1 inet static
10.2.3.4
netmask 255.255.255.0
iface eth1 inet6 static
address fd60:d925:aaaa::bbbb
netmask 64
2. Restart networking service. Note that the address is assigned:
# systemctl restart networking
# ip -6 addr show dev eth1
inet6 fd60:d925:aaaa::bbbb/64 scope global
valid_lft forever preferred_lft forever
3. Now unplug interface and restart networking service
* Expected Results:
- Networking service restarts successfully
* Actual results
- Networking service goes to failed state
* Cause
I think this line of code
https://salsa.debian.org/debian/ifupdown/blob/master/inet6.defn#L98
causes ifup to fail if the interface is unplugged. In particular after unplug
and restart, my ipv6 address
is added as "tentative" and settle-dad.sh does not like it:
# ip -6 addr show dev eth1
inet6 fd60:d925:aaaa::bbbb/64 scope global tentative
valid_lft forever preferred_lft forever
* Workaround:
Put "dad-attempts 0" in the ipv6 stanza with static address.
However, I would like to have the DAD capacbility.
Would it be possible to set dad-attempts condionally
i.e. add `nodad` also if the interface is unplugged
https://salsa.debian.org/debian/ifupdown/blob/master/inet6.defn#L95 ?
--- up and down scripts installed:
/etc/network/if-down.d:
total 4
-rwxr-xr-x 1 root root 332 Jun 2 2015 upstart
lrwxrwxrwx 1 root root 32 Aug 9 00:23 wpasupplicant ->
../../wpa_supplicant/ifupdown.sh
/etc/network/if-post-down.d:
total 0
lrwxrwxrwx 1 root root 23 Jan 23 2017 avahi-daemon -> ../if-up.d/avahi-daemon
lrwxrwxrwx 1 root root 32 Aug 9 00:23 wpasupplicant ->
../../wpa_supplicant/ifupdown.sh
/etc/network/if-pre-up.d:
total 0
lrwxrwxrwx 1 root root 32 Aug 9 00:23 wpasupplicant ->
../../wpa_supplicant/ifupdown.sh
/etc/network/if-up.d:
total 12
-rwxr-xr-x 1 root root 484 Jan 23 2017 avahi-daemon
-rwxr-xr-x 1 root root 972 Mar 1 2018 openssh-server
-rwxr-xr-x 1 root root 1483 Jun 2 2015 upstart
lrwxrwxrwx 1 root root 32 Aug 9 00:23 wpasupplicant ->
../../wpa_supplicant/ifupdown.sh
-- System Information:
Debian Release: 9.6
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.0-8-amd64 (SMP w/1 CPU core)
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8),
LANGUAGE=en_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages ifupdown depends on:
ii adduser 3.115
ii init-system-helpers 1.48
ii iproute2 4.9.0-1+deb9u1
ii libc6 2.24-11+deb9u3
ii lsb-base 9.20161125
Versions of packages ifupdown recommends:
ii isc-dhcp-client [dhcp-client] 4.3.5-3+deb9u1
Versions of packages ifupdown suggests:
ii ppp 2.4.7-1+4
pn rdnssd <none>
-- no debconf information
