IBM Cloud Docs
FAQs for VPC

FAQs for VPC

Can I connect my VPC to my other IBM Cloud workloads?

Yes, you can set up access to your IBM Cloud® classic infrastructure from one VPC in each region. For more information, see Setting up access to classic infrastructure.

Can a subnet's size be changed after it is created?

No, a subnet cannot be resized after it is created.

What is the limit on the number of characters in a VPC name?

Currently, the limit is 100. If this limit is exceeded, you might receive an "internal error" message.

Can any of my VPC resource names begin with a number?

No, although the name can contain numbers, it must begin with a letter.

Are there restrictions on what characters that I can use in a name?

Yes, the UI blocks consecutive double dashes, underscores, and periods from being part of a virtual server instance name.

During the public gateway creation, do I need to reserve the floating IP address, or does the system automatically reserve it? Can I see that floating IP address when I query all of the floating IP addresses?

The VPC API automatically creates a floating IP along with the public gateway if an existing floating IP is not specified. And yes, that floating IP shows up in the list.

Who enforces that only one public gateway can exist per zone for a VPC?

The VPC API service enforces this limit.

Does the VPC public gateway have a timeout function?

Yes, the VPC public gateway has a fixed, 4-minute timeout for TCP connections, and it is not configurable.

How do you obtain the Cloud Resource Name (CRN) of a VPC?

To obtain the CRN of a VPC, click menu menu icon > Resource list from the IBM Cloud console. Expand VPC Infrastructure to list your VPCs. Select a VPC and then click the Status entry to view its details. Use the icon to copy the CRN and paste it where needed.