How to bind DatagramSocket to second NIC?

I need to bind a DatagramSocket to a second "IPv6-enabled" NIC. Binding to the main "IPv4" NIC works fine but I'm being incapable to change to a different NIC. These are my network settings:
eth0    Link encap:Ethernet HWaddr 00:11:43:c8:bd:1c
          inet addr:192.168.1.17 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::211:43ff:fec8:bd1c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:3118 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2608 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3422763 (3.4 MB) TX bytes:317046 (317.0 KB)
          Interrupt:16
lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:720 (720.0 B) TX bytes:720 (720.0 B)
tun0    Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:127.0.1.1 P-t-P:127.0.1.1 Mask:255.255.255.255
          inet6 addr: aaaa::1/64 Scope:Global
          UP POINTOPOINT RUNNING NOARP 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:500
          RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)I want my DatagramSocket to binded to tun0 so I've tried with
DatagramSocket mySocket = new DatagramSocket(port, InetAddress.getByName("127.0.1.1"));and
DatagramSocket mySocket = new DatagramSocket(port, InetAddress.getByName("aaaa::1"));but none of the above methods work: my application is not receiving any UDP traffic on the tun0 interface, at the port specified. I think that binding to a secondary NIC is more complicated than I thought (-:
Any help is welcome !! Thanks !!
Daniel.

Try that method instead getByName and see if you have better luck, keep in mind what the method documentation says about ipv6 addresses.
getByAddress
public static InetAddress getByAddress(byte[] addr)
throws UnknownHostException
Returns an InetAddress object given the raw IP address . The argument is in network byte order: the highest order byte of the address is in getAddress()[0].
This method doesn't block, i.e. no reverse name service lookup is performed.
IPv4 address byte array must be 4 bytes long and IPv6 byte array must be 16 bytes long
Parameters:
addr - the raw IP address in network byte order
Returns:
an InetAddress object created from the raw IP address.
Throws:
UnknownHostException - if IP address is of illegal length
Since:
1.4This is from the sun api for Java 6 btw. [http://java.sun.com/javase/6/docs/api/]

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Sir, I look forward to your early reply bringing a workable solution to the problem I face.
Warm Regards,
Arun

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