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Documentation Index

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Use this file to discover all available pages before exploring further.

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Overview

Instances receive fixed IP addresses from their attached networks automatically. To make an instance reachable from external networks, associate a floating IP address from a public IP pool. Floating IPs can be moved between instances as needed.
Prerequisites
  • An instance with at least one fixed IP address
  • A floating IP pool configured by your administrator
  • An external network with available floating IPs

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Associate a Floating IP

1

Open the Associate Floating IP dialog

Navigate to Compute > Instances. Click the More dropdown on the instance row, then select Associate Floating IP under the Related Resources group.
This action is available when the instance has at least one fixed IP that is not already associated with a floating IP. It is not available on the admin page or when the instance is in Error status.
2

Select the fixed IP

The dialog shows:
FieldDescription
InstanceCurrent instance name (read-only)
Fixed IPSelect the instance port/interface to associate the floating IP with
The fixed IP table shows available ports with their network, subnet, and current IP information. Ports that already have a floating IP or are on unreachable subnets are indicated with reason labels.
3

Select a floating IP

Choose an available floating IP from the pool, or allocate a new one.Click Confirm to associate the floating IP.
The floating IP appears in the instance’s IP addresses list.

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Disassociate a Floating IP

1

Open the Disassociate dialog

Navigate to Compute > Instances. Click the More dropdown on the instance row, then select Disassociate Floating Ip under the Related Resources group.
This action is only available when the instance has at least one associated floating IP.
2

Select the floating IP to remove

FieldDescription
InstanceCurrent instance name (read-only)
AddressSelect the floating IP to disassociate from the dropdown
Click Confirm. The floating IP is released from the instance but remains allocated to your project for future use.

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Next Steps

Security Groups

Configure firewall rules to allow traffic on the floating IP

Floating IPs

Manage floating IP pools and allocations at the network level

Launch an Instance

Create a new instance with network configuration

Troubleshooting

Resolve floating IP association failures