Simple Ad Hoc commands results in many UNREACHABLE hosts

[Sloan Miller]

I have about 200 servers in my hosts file.  I can ssh to those servers without entering a password.  ssh and no errors or trouble.  When i attempt to run a simple Ad Hoc uptime command more that  50% of the servers show up as UNREACHABLE.    Are there any setting I can use to improve this?  Salt uses --async to improve response rates.  Does ansible have any command line flags that are similar?

[privilege_escalation]

become=True

become_method=sudo

become_user=root

gathering = explicit

[inventory]

[ssh_connection]

pipelining = True 

[Brian Coca]

There is an async, but that should not help with unreachable, it would
help to know WHY they are unreachable, normally running with -vvv
gives you helpful information on what is happening at the connection
level.




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Brian Coca