Digging into this issue there is a work around to solve the connectivity issues. The radiusd.conf file is currently pointed to a dh512.pem file which is a dh key of 512. If you use openssl and create a new file with a min. key size of 768 you can replace the original file and restart the radius service. Obviously its better to have Aruba make this change or create a patch for this issue.
Creating a new file
openssl dhparam -check -text -5 768 -out dh512.pem
File Location
/var/avenda/tips/tips/radconfig/certs