I'm trying to configure an IPv6 and an IPv4 address on a VLAN interface.
When I configure it on a non-VLAN interface like this in
/etc/network/interfaces It works as expected, but when I put the same
configuration on a VLAN interface I get an error message on up and down. It
looks like it works anyway but is this the correct way to configure that?
firewall# cat /etc/network/interfaces
iface em0 inet static
address 192.168.20.1
netmask 255.255.255.0
broadcast +
iface em0 inet6 static
address 2001:db8:20::1
netmask 64
iface em0.30 inet static
address 192.168.30.1
netmask 255.255.255.0
broadcast +
iface em0.30 inet6 static
address 2001:db8:30::1
netmask 64
firewall# ifup em0
firewall# ifconfig em0
em0 Link encap:Ethernet HWaddr 00:0D:B9:40:7F:EC
inet addr:192.168.20.1 Bcast:192.168.20.255 Mask:255.255.255.0
inet6 addr: 2001:db8:20::1/64 Scope:Global
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
firewall# ifdown em0
firewall# ifconfig em0
em0 Link encap:Ethernet HWaddr 00:0D:B9:40:7F:EC
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
firewall#
firewall# ifup em0.30
vconfig: ioctl error for add: File exists
firewall# ifconfig em0.30
em0.30 Link encap:Ethernet HWaddr 00:0D:B9:40:7F:EC
inet addr:192.168.30.1 Bcast:192.168.30.255 Mask:255.255.255.0
inet6 addr: 2001:db8:30::1/64 Scope:Global
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
firewall# ifdown em0.30
Cannot find device "em0.30"
firewall# ifconfig em0.30
ifconfig: em0.30: error fetching interface information: Device not found
firewall#
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