On recent deployment for paine, some deployments for dut fails due to "No answer to ssh from <labstation hostname>" which is odd since that only happens to a couple of duts:

Failures
============
chromeos6-row1-rack13-host1    No USB stick detected on Servo host
chromeos6-row1-rack13-host3    No answer to ssh from chromeos6-row1-rack13-labstation
chromeos6-row1-rack13-host7    Download image to usb failed.
chromeos6-row1-rack13-host9    Download image to usb failed.
chromeos6-row1-rack13-host11   Download image to usb failed.
chromeos6-row1-rack13-host13   No answer to ssh from chromeos6-row1-rack13-labstation
chromeos6-row1-rack13-host15   Download image to usb failed.
chromeos6-row1-rack13-host19   No answer to ssh from chromeos6-row1-rack13-labstation
chromeos6-row1-rack13-host21   Download image to usb failed.

Full logs here: gs://chromeos-install-logs/2016-12-05T14:13:01.870731-08:00-auron_paine


Is the labstation unable to handle 11 concurrent ssh requests?