Transporting client timing information across a network
A network device may receive a timing control packet from a first client device. The network device may determine that the network device is in a synchronized state relative to a network grandmaster clock. The network device may modify a first field of a header of the timing control packet to indicate that the network device is in a synchronized state. The network device may modify a second field of the header of the timing control packet to indicate a time at which the network device received the timing control packet from the first client device. The network device may forward, via the network, the timing control packet toward a second client device.
1. A method, comprising:
identifying, by a network device and based on a timing control packet, information that indicates a first time associated with receipt of the timing control packet;
determining, by the network device, a second time associated with when the network device expects to transmit the timing control packet,
wherein the second time is associated with at least one of:
a time at which the network device expects the timing control packet to exit the network device,
a time at which the network device expects the timing control packet to reach a port for transmission toward another device, or
a time at which the network device expects the timing control packet to reach a particular component of the network device;
determining, by the network device and based on the information that indicates the first time and information that indicates the second time, a resident time associated with the timing control packet; and
forwarding, by the network device, a modified timing control packet that indicates the resident time.
2. The method of claim 1 , wherein the timing control packet is received from an ingress network device of a network associated with the network device.
3. The method of claim 1 , wherein the first time is associated with another network device receiving the timing control packet, and
wherein the timing control packet is received by the network device from the other network device.
4. The method of claim 1 , wherein the first time is associated with another network device receiving the timing control packet from a first client device, and
wherein the modified timing control packet is forwarded to a second client device.
5. The method of claim 1 , wherein the modified timing control packet is based on modifying one or more fields of the timing control packet to a null state.
6. The method of claim 1 , wherein the timing control packet includes at least one of:
information indicating that another network device, from which the timing control packet was received, was in a synchronized state when the other device received the timing control packet, or
information indicating a location within a header, of the timing control packet, that indicates the first time.
7. The method of claim 1 , wherein the resident time is determined further based on determining that the network device is in a synchronized state.
8. A network device, comprising:
one or more memories; and
one or more processors to:
identify, based on a timing control packet, information that indicates a first time associated with receipt of the timing control packet;
determine a second time associated with when the network device expects to transmit the timing control packet,
wherein the second time is associated with at least one of:
a time at which the network device expects the timing control packet to exit the network device,
a time at which the network device expects the timing control packet to reach a port for transmission toward another device, or
a time at which the network device expects the timing control packet to reach a particular component of the network device;
determine, based on the information that indicates the first time and information that indicates the second time, a resident time associated with the timing control packet; and
forward a modified timing control packet that indicates the resident time.
9. The network device of claim 8 , wherein the timing control packet is received from an ingress network device of a network associated with the network device.
10. The network device of claim 8 , wherein the first time is associated with another network device receiving the timing control packet, and
wherein the timing control packet is received by the network device from the other network device.
11. The network device of claim 8 , wherein the first time is associated with another network device receiving the timing control packet from a first client device, and
wherein the modified timing control packet is forwarded to a second client device.
12. The network device of claim 8 , wherein the modified timing control packet is based on modifying one or more fields of the timing control packet to a null state.
13. The network device of claim 8 , wherein the timing control packet includes at least one of:
information indicating that another network device, from which the timing control packet was received, was in a synchronized state when the other device received the timing control packet, or
information indicating a location within a header, of the timing control packet, that indicates the first time.
14. The network device of claim 8 , wherein the resident time is determined further based on determining that the network device is in a synchronized state.
15. A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a network device, cause the network device to:
identify, based on a timing control packet, information that indicates a first time associated with receipt of the timing control packet;
determine a second time associated with when the network device will transmit the timing control packet,
wherein the second time is associated with at least one of:
a time at which the network device expects the timing control packet to exit the network device,
a time at which the network device expects the timing control packet to reach a port for transmission toward another device, or
a time at which the network device expects the timing control packet to reach a particular component of the network device;
determine, based on the information that indicates the first time and information that indicates the second time, a resident time associated with the timing control packet; and
forward a modified timing control packet that indicates the resident time.
16. The non-transitory computer-readable medium of claim 15 , wherein the timing control packet is received from an ingress network device of a network associated with the network device.
17. The non-transitory computer-readable medium of claim 15 , wherein the first time is associated with another network device receiving the timing control packet, and
wherein the timing control packet is received by the network device from the other network device.
18. The non-transitory computer-readable medium of claim 15 , wherein the first time is associated with another network device receiving the timing control packet from a first client device, and
wherein the modified timing control packet is forwarded to a second client device.
19. The non-transitory computer-readable medium of claim 15 , wherein the modified timing control packet is based on modifying one or more fields of the timing control packet to a null state.
20. The non-transitory computer-readable medium of claim 15 , wherein the timing control packet includes at least one of:
information indicating that another network device, from which the timing control packet was received, was in a synchronized state when the other device received the timing control packet, or
information indicating a location within a header, of the timing control packet, that indicates the first time.