How to check if a VIP supports http/2

Hi Blue_Whale,

To check if a Virtual IP (VIP) on your F5 LTM supports HTTP/2, you can follow these steps:

1. Check the HTTP/2 Profile Assignment

Ensure that the virtual server has an HTTP/2 profile assigned to it. You can do this via the F5 Configuration utility or the command line.

Using the Configuration Utility:

1. Log in to the F5 Configuration utility.
2. Navigate to: Local Traffic -> Virtual Servers.
3. Select the virtual server you want to check.
4. Go to the "Resources" tab and look for the "HTTP/2 Profile" under "HTTP Profiles".

Using the Command Line:

You can use the tmsh command to list the virtual server configuration and check for the HTTP/2 profile.

tmsh list ltm virtual <virtual_server_name> profiles

Look for an HTTP/2 profile in the output.

2. Verify HTTP/2 Support with Command Line Tools

You can use command line tools like curl to verify if the VIP supports HTTP/2.

curl -I --http2 https://<VIP_IP>

• -I: Fetches the headers only.
• --http2: Forces the use of HTTP/2.

If the VIP supports HTTP/2, you should see HTTP/2 in the response headers.

3. Check the BIG-IP Configuration

Ensure that the BIG-IP system is configured to support HTTP/2. This includes having the necessary profiles and settings in place.

Example Command:

tmsh list ltm profile http2

This command lists all HTTP/2 profiles configured on the system. Ensure that the profile is correctly configured and associated with the virtual server.

4. Review the Documentation

Refer to the F5 documentation for detailed steps on managing HTTP/2 traffic and configuring the HTTP/2 profile.

If you follow these steps and still encounter issues, it might be helpful to check the logs for any errors or warnings related to HTTP/2 traffic.

Kindly rate

HTH

F5 Design Engineer