How to get Interface Identifier during IPv6 PDP activation

This is not relevant for the subject (which is meaningless as explained earlier) or the OPs version of the driver (which is severely outdated). But for anyone else happening to read this thread: You do not need to recompile GobiNet for raw IP support anymore. Newer versions of the driver has a runtime switch. The compile time option simply changes the default setting of this switch. You can always override it at runtime by for example:

insmod GobiNet.ko iRAWIPEnable=1

This will make the MC73xx use raw IP mode.