Delay measurement for hybrid packet and optical transport networks

An apparatus comprising:

• one or more network interfaces configured to enable network communication on behalf of a gateway node in a hybrid network environment that includes a first network domain of a first network type and a second network domain of a second network type, the gateway node being at a boundary of the first network domain and the second network domain;
• one or more network processors coupled to the one or more network interfaces to send and receive network communications in the first network domain and in the second network domain;
• and
• a control processor coupled to the one or more network processors, the control processor configured to perform operations including:
• obtain an end-to-end delay measurement request received by the one or more network processors that is sent by a first node in the first network domain to measure end-to-end delay between the first node and a second node in the second network domain, the end-to-end delay measurement request configured to initiate a first delay measurement process configured for use in the first network domain;
• causing the one or more network processors to send to the second node a delay measurement request configured to initiate a second delay measurement process configured for use in the second network domain;
• determining a delay measurement in the second network domain between the gateway node and the second node using the second delay measurement process;
• and
• using the delay measurement in the second network domain, causing the one or more network processors to send to the first node an end-to-end delay measurement response that enables the first node to compute the end-to-end delay.

One or more non-transitory computer readable storage media encoded with instructions that, when executed by a control processor in a gateway node, causes the gateway node to perform operations for measuring end-to-end delay between a first node and a second node in a hybrid network environment that includes a first network domain of a first network type and a second network domain of a second network type, the first node being a part of the first network domain and the second node being a part of the second network domain, the operations including:

• obtaining an end-to-end delay measurement request sent by the first node to measure end-to-end delay between the first node and the second node, the end-to-end delay measurement request configured to initiate a first delay measurement process configured for use in the first network domain;
• causing to be sent to the second node a delay measurement request configured to initiate a second delay measurement process configured for use in the second network domain;
• determining a delay measurement in the second network domain between the gateway node and the second node using the second delay measurement process;
• and
• using the delay measurement in the second network domain, causing to be sent to the first node an end-to-end delay measurement response that enables the first node to compute the end-to-end delay.