Recertification Requirements for Interconnecting Cisco Networking Devices Part 2 (ICND2)
CCNA Routing and Switching certifications are valid for three years. To recertify, pass ONE of the following before the certification expiration date:
When using a higher level of certification to extend other certifications, the expiration date of other certifications will extend to the expiration date of the higher certification (i.e.: If you have one year left on your CCNA Routing and Switching certification and you earn a CCIE certification (which has a two-year certification life) then both your CCIE certification and your CCNA Routing and Switching certification will expire two years from the date you achieved the CCIE certification).