http://www.juniper.net/us/en/training/certification/recertification.htmlPassing an exam at a higher level renews all lower-level certifications for two years from the date of passing the higher-level exam. For example, passing the JNCIP exam will renew the JNCIS certification (and JNCIA certification if currently held) for two years from the date of passing the JNCIP exam.
So if i give JNCIS-ER before march 2010 then it will automatically extend my JNCIA-ER for next 2 years but what if i gives JNCIS-ER after march 2010 so still it will automatically renew my suspended jncia-er ?