# File lib/aws/ec2/network_interface.rb, line 126 def attach instance, options = {} instance_id = instance.is_a?(Instance) ? instance.instance_id : instance client_opts = {} client_opts[:network_interface_id] = network_interface_id client_opts[:instance_id] = instance_id client_opts[:device_index] = options[:device_index] || 1 client.attach_network_interface(client_opts) nil end