SSH cipher encryption algorithms rijndael128-cbc and rijndael192-cbc are broken in VOSS 7.x or 8.x releases (for VSP 8600 broken since 188.8.131.52). This problem may cause partial loss of running configuration on switch reset after upgrade.
Solution is provided in the following releases:
VOSS release 7.1.3
VSP8600 release TSU-184.108.40.206
On the first boot after software upgrade issue following commands shown below:
no ssh ssh encryption-type rijndael128-cbc rijndael192-cbc ssh wri mem reset