# Remote Error: IpAddressGenerationFailure No More IP Addresses Available on Network

## Problem

* The ***pf9-neutron-l3-agent*** service fails to start. The following error is logged in */var/log/pf9/pf9-neutron-l3-agent.log.*

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{% tab title="None" %}

```none
ERROR neutron.agent.l3.router_info RemoteError: Remote error: IpAddressGenerationFailure No more IP addresses available on network [UUID].
```

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* The list network namespace output is empty.

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{% tab title="None" %}

```none
$ ip netns list
```

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## Environment

* Platform9 Managed OpenStack - v3.6.0 and Higher
* Neutron

## Cause

* The IP addresses in the subnet allocation pool for the external network are exhausted.
* Either they all may be in use or may have stale IPs that need to be cleaned up.

## Resolution

1. Identify the floating IP addresses not associated with any port.

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```none
$ openstack floating ip list --network [network uuid] | grep None
```

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1. Delete the floating IPs with no port association.

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{% tab title="None" %}

```none
$ openstack floating ip delete [UUID]
```

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1. Start the Neutron L3 Agent service as root.

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```none
# systemctl start pf9-neutron-l3-agent.service
```

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