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File: //lib/python3/dist-packages/awscli/examples/ec2/modify-subnet-attribute.rst
**To change a subnet's public IPv4 addressing behavior**

This example modifies subnet-1a2b3c4d to specify that all instances launched into this subnet are assigned a public IPv4 address. If the command succeeds, no output is returned.

Command::

  aws ec2 modify-subnet-attribute --subnet-id subnet-1a2b3c4d --map-public-ip-on-launch

**To change a subnet's IPv6 addressing behavior**

This example modifies subnet-1a2b3c4d to specify that all instances launched into this subnet are assigned an IPv6 address from the range of the subnet.

Command::

  aws ec2 modify-subnet-attribute --subnet-id subnet-1a2b3c4d --assign-ipv6-address-on-creation

For more information, see `IP Addressing in Your VPC`_ in the *AWS Virtual Private Cloud User Guide*.

.. _`IP Addressing in Your VPC`: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-ip-addressing.html
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