In the Vivado 2016.1 and 2016.2 release of the JESD204B core, the lane ID in the ILA configuration data is incorrect. It is always tied to 0 for every lane, regardless of the user input.
A patch is provided for Vivado 2016.1 and Vivado 2016.2 which will fix the issue seen in the ILA configuration data.
Please see the Readme file included in the patch for details on how to install the patch.
This issue will be resolved in Vivado 2016.3.