Additional IPs are IPs that can be easily moved from device to device. This makes them optimal for networking VMs on a Dedicated Server, load balancing, IP aliasing, and many other use cases. In this guide, we will cover everything you need to know about how to use additional IPs with OVHcloud.
- Basic Networking with an Additional IP
- Purchasing Additional IPs
- How to Use an Additional IP in the OVHcloud Manager
Basic Networking with an Additional IP
In this section, we will cover a couple of concepts about additional IPs that are important to understand from a networking perspective. While additional IPs can be purchased in blocks as small as /32 or as large as /24, the CIDR notation only indicates how many IPs you get. It does not denote a subnet. Every IP is routed through the host. This means that every IP a customer purchases can be used since no addresses need to be reserved for network, broadcast, or gateway.
Your gateway IP address will be determined independently of your additional IP block. At OVHcloud, we reserve the last available IP in each /24 subnet (not including the broadcast address) for a gateway address. Additionally, all Dedicated Servers are given an IP on a /24 subnet. This means a Dedicated Server's gateway will always be the first three octets of its IP followed by .254. For example, if your Dedicated Server's IP was 203.0.113.34, its gateway would be 203.0.113.254. Since additional IPs are routed through the host, any VM or other service using the additional IP would also use this as the gateway address.
Purchasing Additional IPs
To order additional IPs, log in to the OVHcloud Manager, then:
Bare Metal Cloudor
Hosted Private Cloudfrom the top navigation bar.
- Select the
Alternatively, from the Bare Metal Cloud or Hosted Private Cloud areas, you can:
Networkfrom the left side navigation bar.
- Select the
- Click the
+ Order IPsbutton.
From the "Order additional IPs" pop-up window, choose the environment to which you would like the IP address(es) to be attached.
Afterward, click the
In step two, select the number of IP addresses that you would like to purchase. The choices are 1 (/32), 4 (/30), 8 (/29), 16 (/28), 32 (/27), 64 (/26), 128 (/25), and 256 (/24).
[PRIMARY]The availability of these choices depends on the service selected in the previous step.
Additionally, if you purchase a block of 4 IPs (/30) or greater, the IP addresses can still be moved, but as an entire block ONLY. Also, you are able to set the WHOIS information by using the "Click here to access the organization management" link.
You may also add your ARIN Organization in this step if you already have one.
After you have chosen your desired purchase, click the
Continue my order button. You are taken to an order page to pay for the additional IP(s). After completing the order the additional IP address(es) will appear in the IP section of the OVHcloud Manager.
How to Use an Additional IP in the OVHcloud Manager
Once you have ordered the additional IP, you can view it by clicking
IP. It is easily identified by the Additional IP label next to it.
You can order more Additional IPs or bring your own by clicking the buttons near the top of the page next to Manage IPs.
You can use the gear and export icon to manage your organization or export your IP addresses to a CSV file.
You can use the following menu to perform a few tasks on your additional IPs: adding a description, moving the additional IP block to another service, parking it, deleting it, and more. You can access this menu by clicking the more options
... button on the right-hand side of the Additional IP.
Having read this article, you should understand basic networking concepts for OVHcloud Additional IPs. You should also be able to order additional IPs and perform basic operations on them in the OVHcloud Manager.