so I am studying to take the ensld 300-420 exam and am using the official cert guide 2nd ed. as my primary resource. moving through the IPv6 section it states that for eui-64 addresses you just split the mac in half and insert FFFE. this is a pain because I used to teach networking and half of my textbooks make this exact statement, while the other half also state that you have to flip the 7th bit... so my question is what is the official answer that cisco wants? is their official cert guide wrong? (not a surprise since it looks like Odom made an intern write his last CCNA guide from memory), or is the exam itself wrong?
