And then there are the "enterprise switches" from at least one major vendor, whose crappy ssh implementation only supports a single tty channel (no exec channel

And then there are the "enterprise switches" from at least one major vendor, whose crappy ssh implementation only supports a single tty channel (no exec channels), so you have to run expect anyhow. :-( $ ssh root@router uname -a Connection closed by shitty ssh implementation. $ ssh root@router Welcome to router! >