What is HTTP 506 Variant Also Negotiates?
The 506 Variant Also Negotiates response indicates a configuration problem with content negotiation.
It occurs when a server attempts to negotiate a representation of a resource but the selected variant is configured to perform further negotiation itself.
Common Causes
- Incorrect server configuration
- Invalid content negotiation rules
- Misconfigured Apache modules
Why Does It Matter?
Although rare, 506 errors can indicate configuration mistakes in complex web servers.
Summary
The 506 Variant Also Negotiates response represents a server-side configuration issue during content negotiation.