Adaptive in-band network telemetry for full network coverage
A mechanism for adaptively performing in-band network telemetry (INT) by a network controller is disclosed. The mechanism includes receiving one or more congestion indicators from a collector. An adjusted sampling rate is generated. The adjusted sampling rate is a specified rate of insertion of instruction headers for INT and is generated based on the congestion indicators. The adjusted sampling rate is transmitted to a head node, which is configured to perform INT via instruction header insertion into user packets.
1. A method comprising:
receiving, by a system comprising a processor and a memory, one or more congestion indicators;
determining, by the system, an adjusted sampling rate of instruction header insertions for in-band network telemetry (INT) based on the one or more congestion indicators; and
performing, by the system, INT via instruction header insertions into user packets at the adjusted sampling rate.
2. The method of claim 1 , wherein the congestion indicators include at least one of latency, packet loss, buffer size, or explicit congestion notification.
3. The method of claim 1 , wherein the adjusted sampling rate indicates a probability of an insertion of an instruction header for each user packet.
4. The method of claim 1 , wherein the adjusted sampling rate indicates a frequency of instruction header insertions per group of user packets.
5. The method of claim 1 , wherein the adjusted sampling rate is determined periodically.
6. The method of claim 1 , wherein a period for determining the adjusted sampling rate is set as a round trip time of a user packet between the head node and an end node.
7. The method of claim 1 , wherein the adjusted sampling rate is determined based on a previous sampling rate and the congestion indicators according to an additive increase and multiplicative decrease (AIMD) mechanism.
8. The method of claim 1 , the method further comprising:
transmitting an instruction indicating to perform postcard-based INT.
9. The system of claim 1 , the method further comprising:
transmitting an instruction indicating to perform passport-based INT.
10. A system comprising:
at least one processor; and
memory storing instructions that when executed by the at least one processor cause the system to:
receive one or more congestion indicators;
determine an adjusted sampling rate of instruction header insertions for in-band network telemetry (INT) based on the one or more congestion indicators; and
perform INT via instruction header insertions into user packets at the adjusted sampling rate.
11. The system of claim 10 , wherein the congestion indicators include latency, packet loss, buffer size, explicit congestion notification, or combinations thereof.
12. The system of claim 10 , wherein the adjusted sampling rate indicates a probability of an insertion of an instruction header for each user packet.
13. The system of claim 10 , wherein the adjusted sampling rate indicates a frequency of instruction header insertions per group of user packets.
14. The system of claim 10 , wherein the adjusted sampling rate is determined periodically.
15. The system of claim 10 , wherein a period for determining the adjusted sampling rate is set as a round trip time of a user packet between the head node and an end node.
16. The system of claim 10 , wherein the adjusted sampling rate is determined based on a previous sampling rate and the congestion indicators according to additive increase and multiplicative decrease.
17. The system of claim 10 , wherein the instructions executed by the at least one processor to further cause the system to:
transmit an instruction indicating to perform postcard-based INT.
18. The system of claim 10 , wherein the instructions executed by the at least one processor to further cause the system to:
transmit an instruction indicating to perform passport-based INT.
19. One or more non-transitory computer readable medium comprising instructions that when executed by at least one processor of a system causes the system to:
receive one or more congestion indicators;
determine an adjusted sampling rate of instruction header insertions for in-band network telemetry (INT) based on the one or more congestion indicators; and
perform INT via instruction header insertions into user packets at the adjusted sampling rate.
20. The one or more non-transitory computer readable medium of claim 19 , wherein the instructions are executed by the at least one processor, further cause the system to transmit an instruction indicating to perform postcard-based INT or passport-based INT.