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Amitabh Ghosh
Asked: 2017-03-17 08:56:17 +0800 CST

EC2 is dead after doing eth0 down

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Thanks to my stupidity, I did this on an EC2 instance:

ifconfig eth0 down

After this, my instance became non-responsive and I don't see a way to bring the eth0 up. I was not able to SSH to the instance, nor change the ENI (I never provisioned a spare ENI in the VPC). The only option that was available was to terminate the instance. Now, I understand I can attach another ENI to the instance (eth1). What I want to understand is:

  1. If eth0 is down, can the instance be still functional or bootable using eth1 (considering the instance was served with two eth* at the launch)?
  2. Will the eth1 keep changing the private IP considering it was a secondary ENI?

Hope my question makes sense.

amazon-ec2

1 Answers

  1. Best Answer

    Just stop/start the instance. As long as you didn't permanently disable eth0, it should come up with its normal configuration when the server starts again.

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