This is an old revision of the document!
From ssh2 to openssh
ssh-keygen -i -f id_dsa.pub > id_dsa_open.pub
From OpenSSH to ssh2
ssh-keygen -e -f id_dsa.pub > id_dsa_ssh2.pub
To increase speed on transfer you can force cipher to arcfour
scp -c arcfour <source> <destination>