Home > Guides > Dashboard Users Guide > Clouds > AWS Regions > EC2 Elastic IPs

MindTouch
Copyright (c) 2006-2014 MindTouch Inc.
http://mindtouch.com

This file and accompanying files are licensed under the MindTouch Master Subscription Agreement (MSA).

At any time, you shall not, directly or indirectly: (i) sublicense, resell, rent, lease, distribute, market, commercialize or otherwise transfer rights or usage to: (a) the Software, (b) any modified version or derivative work of the Software created by you or for you, or (c) MindTouch Open Source (which includes all non-supported versions of MindTouch-developed software), for any purpose including timesharing or service bureau purposes; (ii) remove or alter any copyright, trademark or proprietary notice in the Software; (iii) transfer, use or export the Software in violation of any applicable laws or regulations of any government or governmental agency; (iv) use or run on any of your hardware, or have deployed for use, any production version of MindTouch Open Source; (v) use any of the Support Services, Error corrections, Updates or Upgrades, for the MindTouch Open Source software or for any Server for which Support Services are not then purchased as provided hereunder; or (vi) reverse engineer, decompile or modify any encrypted or encoded portion of the Software.

A complete copy of the MSA is available at http://www.mindtouch.com/msa

EC2 Elastic IPs

Table of Contents

Table of Contents

Overview

An Elastic IP (EIP) is an IP address that you can reserve from AWS for your account. Once you've created an Elastic IP, you can assign it to any instance of your choice. Once you reserve an Elastic IP, nobody else can use that IP address. Elastic IPs are unique because they are dynamically remappable IP addresses that make it easier to manage servers and make global changes in the cloud. Whereas static IPs are associated to a particular machine, EIPs can be reassigned to different instances when necessary as you launch and terminate servers. Typically, you will associate EIPs to your frontend servers. You can assign an EIP to a running instance or associate an EIP when an instance is launched. Be careful, you can also "steal" an EIP from one of your instances. As a best practice, you should age any new EIP before you assign it to one of your public facing servers because that IP address may still be temporarily cached and mapped to its previous instance. You do not want to accidentally inherit unintended traffic from its predecessor.

  • Click the disassociate button to disassociate an Elastic IP from an instance. If you disassociate an EIP from a running instance, it will remain without a public IP address until Amazon re-assigns a new one, which can take several minutes.
  • Click the delete button to permanently delete an Elastic IP from your account. When you delete an EIP, you are essentially releasing that IP address back to Amazon so that it can't be reissued to another account. Delete with caution because you will never be able to get that exact same IP address ever again. If you delete an EIP from a running instance, it will remain without a public IP address until Amazon re-assigns a new one, which can take several minutes. When you delete an EIP, it will not disappear from the GUI until Amazon has finished releasing the IP address.
  • If an Elastic IP is locked, it cannot be deleted, associated, or disassociated. To lock an EIP, you must lock the server.

Note: By default, Amazon will allow you to reserve 5 EIPs per account. You can request more directly with Amazon. EIPs are free to use as long as they are being used (associated) by an operational instance. However, you will be charged by Amazon for unused EIPs. This is because they are publicly routable IP addresses. Public IPv4 addresses are a limited resource, so if you reserve addresses and do not use them, it is considered a wasteful practice and you will be charged by Amazon.

Action Buttons

  • New - Create a new Elastic IP address. You should receive a flash status message in the RightScale banner/header portion of the Dashboard. For example: "New IP '174.129.241.232' was allocated successfully. New IPs may take several minutes to appear."
  • New VPC EIP - Create a new Elastic IP address, but one that will only be designated for use by an instance in a VPC.
Clouds > AWS Region > Elastic IPs > Index

You must to post a comment.
Last Modified
22:14, 16 May 2013

Tags

Classifications

This page has no classifications.

Announcements

None

Glossary | 用語용어 Site Map | Site Help Community Corporate Site Get Support Dashboard Login
Doc Feedback Product Feedback Resources MultiCloud Marketplace Forums

Dashboard Status


© 2006-2014 RightScale, Inc. All rights reserved.
RightScale is a registered trademark of RightScale, Inc. All other products and services may be trademarks or servicemarks of their respective owners.