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Runbook for 'SSH unreachable' alerts
- Try logging in via the mgmt interface. Can you get a console from there? What is the output?
- sshd can be overwhelmed by rapid attempts to connect; if you can get on the host and things seem normal, check /var/log/auth.log for errors
- If you can get on the host, run 'ip link show' to check if there is physical network connection
- If 3) fails, escalate the issue to the dcops team.