Package: ifupdown
Version: 0.8.35
Severity: important
Tags: ipv6
Dear Maintainer,
My ISP (Spectrum in the US) no longer support SLAAC for IPv6 autoconfiguration.
Instead, DHCPv6 is
required. However, a configuration stanza like:
iface eth1 inet6 dhcp
accept_ra 0
autoconf 0
request_prefix 1
Will return a Prefix Deletgation (PD) but not an Interface Address (IN). The
generated dhclient
command line was:
/sbin/dhclient -6 -v -pf /run/dhclient6.eth1.pid -lf
/var/lib/dhcp/dhclient6.eth1.leases -I -P -N -df
/var/lib/dhcp/dhclient.eth1.leases eth1
Adding the -R command line flag resolves the issue, but I could not find a way
to add this via the
/etc/interfaces file (I tried adding `dhcp 1` but that had no effect). Running
the command above with
the -R flag correctly configures the prefix delegation and the WAN interface.
It did not add a default
route correctly, but that was probably because I did it manually. Using
`rdisc6` and adding it
manually via `ip -6 route add default via` worked.
I think the problem can be resolved by having a flag which will add the '-R'
flag to require all
DHCPv6 components to get a response, as the ISP's server seems to require
multiple queries to
get the PD and IN responses. I can provide logs of both with and without the
`-R` flag if that
will help.
-Carl
-- Package-specific info:
--- /etc/network/interfaces:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo eth1 eth2 he-ipv6 vlan1 vlan2 vlan3 vlan4 vlan5 vlan6 vlan7
iface lo inet loopback
# The primary network interface
iface eth1 inet dhcp
# This is an autoconfigured IPv6 interface
iface eth1 inet6 dhcp
accept_ra 0
autoconf 0
request_prefix 1
#post-up ip addr add 192.168.100.2/24 dev eth1
#pre-down ip addr del 192.168.100.2/24 dev eth1
iface he-ipv6 inet6 v4tunnel
endpoint 184.105.253.10
address 2001:470:1f0e:296::2
netmask 64
ttl 64
post-up ip -6 route flush table he
post-up ip -6 route add default via 2001:470:1f0e:296::1 table he
post-up ip -6 rule add priority 15001 from 2001:470:1f0f:296::/64 to
2000::/3 table he
post-up ip -6 rule add priority 15002 from 2001:470:b8b2::/48 to
2000::/3 table he
# Internal network interface
iface eth2 inet manual
iface vlan1 inet static
address 192.168.123.1
netmask 255.255.255.0
vlan-raw-device eth2
dns-nameservers 192.168.123.4
iface vlan1 inet6 manual
accept_ra 0
privext 0
dhcp 0
iface vlan2 inet static
address 192.168.255.1
netmask 255.255.255.0
vlan-raw-device eth2
iface vlan2 inet6 static
address 2001:470:b8b2:2::1
netmask 64
accept_ra 0
privext 0
iface vlan3 inet static
address 192.168.203.1
netmask 255.255.255.0
vlan-raw-device eth2
iface vlan3 inet6 static
address 2001:470:b8b2:3::1
netmask 64
accept_ra 0
privext 0
iface vlan4 inet static
address 192.168.204.1
netmask 255.255.255.0
vlan-raw-device eth2
iface vlan4 inet6 static
address 2001:470:b8b2:4::1
netmask 64
accept_ra 0
privext 0
iface vlan5 inet static
address 192.168.205.1
netmask 255.255.255.0
vlan-raw-device eth2
iface vlan5 inet6 static
address 2001:470:b8b2:5::1
netmask 64
accept_ra 0
privext 0
iface vlan6 inet static
address 192.168.206.1
netmask 255.255.255.0
vlan-raw-device eth2
iface vlan6 inet6 static
address 2001:470:b8b2:6::1
netmask 64
accept_ra 0
privext 0
iface vlan7 inet static
address 192.168.207.1
netmask 255.255.255.0
vlan-raw-device eth2
iface vlan7 inet6 static
address 2001:470:b8b2:7::1
netmask 64
accept_ra 0
privext 0
--- up and down scripts installed:
/etc/network/if-down.d:
total 8
-rwxr-xr-x 1 root root 372 Dec 1 2014 openvpn
-rwxr-xr-x 1 root root 800 May 21 2017 postfix
lrwxrwxrwx 1 root root 33 Nov 3 2018 wide-dhcpv6-client ->
../../wide-dhcpv6/dhcp6c-ifupdown
/etc/network/if-post-down.d:
total 4
-rwxr-xr-x 1 root root 1433 Feb 4 2019 vlan
/etc/network/if-pre-up.d:
total 8
-rwxr-xr-x 1 root root 4224 Feb 21 2019 vlan
/etc/network/if-up.d:
total 20
-rwxr-xr-x 1 root root 677 Feb 4 2019 ip
-rwxr-xr-x 1 root root 4948 Feb 3 2019 mountnfs
-rwxr-xr-x 1 root root 385 Nov 12 2015 openvpn
-rwxr-xr-x 1 root root 1117 May 21 2017 postfix
lrwxrwxrwx 1 root root 33 Nov 3 2018 wide-dhcpv6-client ->
../../wide-dhcpv6/dhcp6c-ifupdown
-- System Information:
Debian Release: 10.5
APT prefers stable
APT policy: (1000, 'stable'), (995, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.19.0-8-amd64 (SMP w/2 CPU cores)
Kernel taint flags: TAINT_WARN
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 /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages ifupdown depends on:
ii adduser 3.118
ii iproute2 4.20.0-2
ii libc6 2.28-10
ii lsb-base 10.2019051400
Versions of packages ifupdown recommends:
ii isc-dhcp-client [dhcp-client] 4.4.1-2
Versions of packages ifupdown suggests:
pn ppp <none>
pn rdnssd <none>
-- no debconf information
