# Limitations

This section lists the limitations of Cross Connect:

* Ensure all [<mark style="color:blue;">NICs</mark>](https://docs.ionos.com/cloud/support/general-information/glossary-of-terms#network-interface-card-nic) used for the Cross Connect connection are within the same IP range. You may also consider using your own DHCP server as an option. For the time being, we recommend that you verify the IP addresses of the VDCs manually. IONOS Cloud is constantly working to improve the existing products and implement an automatic check to verify the IP addresses automatically in the future.
* An [<mark style="color:blue;">IP address</mark>](https://docs.ionos.com/cloud/support/general-information/glossary-of-terms#internet-protocol-ip-address) may not be used in more than one instance.
* You can use a Cross Connect to connect between **all** your VDCs in the following regions only: `gb/lhr`, `de/txl`, and `de/fra`. Other regions may have restrictions on the connectable VDCs.