@lyndidon, Thank you for your reply. I added some ssh commands as the below. but CRT still cannot access the Junos. I got the below output via putty. Can you take at the below? Thank you again
root@% cli
root> show configuration | display set
set version 12.1R1.9
set system root-authentication encrypted-password "$1$QpLPmCtw$SpKEjyYUG23WZ5WCuv3.H/"
set system services ssh root-login allow
set system services ssh protocol-version v2
set system syslog user * any emergency
set system syslog file messages any notice
set system syslog file messages authorization info
set system syslog file interactive-commands interactive-commands any
@python, my issue is CRT can access cisco router, but cannot access Juniper in same gns3 window. The link you mentioned is for cisco router. Thank you