Message Type | Used by | Description |
Echo Request/Response | GTP-C, GTP-U, GTP’ | Echo Request is sent on a path to another GSN to determine if the other node is alive. Echo Response is the reply. |
Version not Supported | GTP-C, GTP-U, GTP’ | There are multiple versions of GTP. Both devices communicating must use the same version of GTP, or this message will be the response. |
Support Extension Headers Notification | Extensions are optional parts that a device can choose to support or not. If a device includes these extensions, it must include headers for the extensions to sure ensure proper formatting. |