As far as I know, Generally NSO has device session pool. Once NSO connects devices, it is maintained for a while. See also: <NSO installation directory>doc/html/nso_user_guide/user_guide.devicemanager.pooling.html   And NSO may also consume FD in ord...

Hi,You can get result as following.---                for dev in root.ncs__devices.device:                    output = dev.ssh.fetch_host_keys()                    print('[{}]fetch result: {}'.format(dev.name, output.result))---$ python ssh_fetch.py[...