Supporting non-delivery notification between a switch and device in a network

A computer program product for communicating with an adaptor and a destination node, the computer program product comprising a computer readable storage medium having computer readable program code embodied therein that executes to perform operations, the operations comprising:

• receiving a login request from the adaptor including a test service parameter requesting a non-delivery notification service;
• indicating the non-delivery notification service as available for the adaptor in response to determining that the non-delivery notification is supported;
• receiving a test path request to the destination node from the adaptor;
• forwarding the test path request to the destination node;
• determining that the destination node to which the test path request is directed is unavailable;
• determining whether the non-delivery notification service is available for the adaptor in response to determining that the destination node is unavailable;
• and
• sending a non-delivery notification to the adaptor for the destination node in response to determining that the non-delivery notification service is available for the adaptor.

A system in communication with a switch and a destination node, comprising:

• an adaptor for communicating with the switch and the destination node, wherein the adaptor executes operations, the operations comprising:
• initiating a login with the switch including a test service parameter requesting a non-delivery notification service to cause the switch to return a non-delivery notification in response to a test path request indicating the destination node that is unavailable;
• indicating that the test service is available for the login in response to receiving a reply from the switch that the switch accepts the login with the non-delivery notification service;
• sending the test path request to the switch to determine whether the destination node is available in response to determining that the non-delivery notification service is available for the switch login;
• and
• receiving the non-delivery notification from the switch in response to the switch determining that the destination node to which the test path request is directed is unavailable.

A switch in communication with a device adaptor and a destination node, comprising:

• a switch adaptor for communicating with the device adaptor and the destination node, wherein the adaptor executes operations, the operations comprising:
• receiving a login request from the device adaptor including a test service parameter requesting a non-delivery notification service;
• indicating the non-delivery notification service as available for the device adaptor in response to determining that the non-delivery notification is supported;
• receiving a test path request to a destination node from the device adaptor;
• forwarding the test path request to the destination node;
• determining that the destination node to which the test path request is directed is unavailable;
• determining whether the non-delivery notification service is available for the device adaptor in response to determining that the destination node is unavailable;
• and
• sending a non-delivery notification to the device adaptor for the destination node in response to determining that the non-delivery notification service is available for the device adaptor.

A method implemented in a computer device, comprising:

• initiating, at the computer device, a login with a switch including a test service parameter requesting a non-delivery notification service to cause the switch to return a non-delivery notification in response to a test path request indicating a destination node that is unavailable;
• indicating that the test service is available for the login in response to receiving a reply from the switch that the switch accepts the login with the non-delivery notification service;
• sending the test path request to the switch to determine whether the destination node is available in response to determining that the non-delivery notification service is available for the switch login;
• and
• receiving the non-delivery notification from the switch in response to the switch determining that the destination node to which the test path request is directed is unavailable.