addons: addressvirtual: new attribute: address-virtual-ipv6-addrgen [on|off]

addons: addressvirtual: new attribute: address-virtual-ipv6-addrgen [on|off]

[14:53:46] root:~ # ifquery -a
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto vlan1903
iface vlan1903
	alias LAB-CUST-VMS
	vlan-id 1903
	vlan-raw-device bridge
	address 2a06:c01:1:1903::3/64
	address 185.98.123.3/24
	address-virtual 00:00:5e:00:01:a3 2a06:c01:1:1903::1/64 fe80::1/64 185.98.123.1/24
	vrf public

auto public
iface public
	vrf-table auto

auto bridge
iface bridge
	bridge-ports swp1

[14:53:47] root:~ # ifup -a
[14:53:50] root:~ # ip addr show vlan1903-v0
46: vlan1903-v0@vlan1903: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master public state UP group default
    link/ether 00:00:5e:00:01:a3 brd ff:ff:ff:ff:ff:ff
    inet 185.98.123.1/24 scope global vlan1903-v0
       valid_lft forever preferred_lft forever
    inet6 2a06:c01:1:1903::1/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::200:5eff:fe00:1a3/64 scope link
       valid_lft forever preferred_lft forever
    inet6 fe80::1/64 scope link
       valid_lft forever preferred_lft forever
[14:53:52] root:~ #
[14:53:54] root:~ #
[14:53:54] root:~ # nano /etc/network/interfaces
[14:53:57] root:~ # ifquery vlan1903
auto vlan1903
iface vlan1903
	alias LAB-CUST-VMS
	vlan-id 1903
	vlan-raw-device bridge
	address 2a06:c01:1:1903::3/64
	address 185.98.123.3/24
	address-virtual 00:00:5e:00:01:a3 2a06:c01:1:1903::1/64 fe80::1/64 185.98.123.1/24
	address-virtual-ipv6-addrgen off
	vrf public

[14:54:05] root:~ # ifdown -a -X eth0
[14:54:08] root:~ # ifup -a -v
...
...
info: executing /bin/ip -force -batch - [link set dev vlan1903-v0 master public
link set dev vlan1903-v0 addrgenmode none
link set dev vlan1903-v0 down
link set dev vlan1903-v0 address 00:00:5e:00:01:a3
link set dev vlan1903-v0 up
addr add 2a06:c01:1:1903::1/64 dev vlan1903-v0
addr add fe80::1/64 dev vlan1903-v0
addr add 185.98.123.1/24 dev vlan1903-v0
route del 2a06:c01:1:1903::/64 table 1001 dev vlan1903-v0
route del fe80::/64 table 1001 dev vlan1903-v0
route add 2a06:c01:1:1903::/64 table 1001 dev vlan1903-v0 proto kernel metric 9999
route add fe80::/64 table 1001 dev vlan1903-v0 proto kernel metric 9999
]
...
...
[14:54:14] root:~ # ip addr show vlan1903-v0
50: vlan1903-v0@vlan1903: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master public state UP group default
    link/ether 00:00:5e:00:01:a3 brd ff:ff:ff:ff:ff:ff
    inet 185.98.123.1/24 scope global vlan1903-v0
       valid_lft forever preferred_lft forever
    inet6 2a06:c01:1:1903::1/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::1/64 scope link
       valid_lft forever preferred_lft forever
[14:54:16] root:~ #

Reviewed-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Julien Fortin <julien@cumulusnetworks.com>