PATH MAXIMUM TRANSMISSION UNIT DISCOVERY
First Claim
1. A method for a source device to perform discovery of a path maximum transmission unit (PMTU) of a path between the source device and a destination device in a communications network, comprising:
- configuring a request message to have a size of an estimated PMTU of the path, to cause a reply message to be received from the destination device or at least one report message to be received from an intermediate device on the path, and to include a flag that allows fragmentation of the request message;
sending the request message to the destination device via the intermediate device;
receiving the reply message from the destination device or the at least one report message from the intermediate device responsive to the request message; and
based on the reply message or the at least one report message, determining that fragmentation of the request message has occurred because the estimated PMTU is greater than an actual PMTU and updating the estimated PMTU.
2 Assignments
0 Petitions
Accused Products
Abstract
An example method is provided for a source device to perform discovery of a path maximum transmission unit (PMTU) of a path between the source device and a destination device in a communications network. The method may comprise configuring and sending a request message to the destination device via an intermediate device on the path. The request message may be configured to have a size of an estimated PMTU of the path, to cause a reply message to be received from the destination device or at least one report message to be received from the intermediate device, and to include a flag that allows fragmentation of the request message. The method may further comprise receiving the reply message from the destination device or the at least one report message from the intermediate device responsive to the request message; and based on the reply message or the at least one report message, determining that fragmentation of the request message has occurred because the estimated PMTU is greater than an actual PMTU and updating the estimated PMTU.
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Citations
22 Claims
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1. A method for a source device to perform discovery of a path maximum transmission unit (PMTU) of a path between the source device and a destination device in a communications network, comprising:
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configuring a request message to have a size of an estimated PMTU of the path, to cause a reply message to be received from the destination device or at least one report message to be received from an intermediate device on the path, and to include a flag that allows fragmentation of the request message; sending the request message to the destination device via the intermediate device; receiving the reply message from the destination device or the at least one report message from the intermediate device responsive to the request message; and based on the reply message or the at least one report message, determining that fragmentation of the request message has occurred because the estimated PMTU is greater than an actual PMTU and updating the estimated PMTU. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A non-transitory computer-readable storage medium that includes a set of instructions which, in response to execution by a processor, causes the processor to perform a method for a source device to perform discovery of a path maximum transmission unit (PMTU) of a path between the source device and a destination device in a communications network, the method comprising:
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configuring a request message to have a size of an estimated PMTU of the path, to cause a reply message to be received from the destination device or at least one report message to be received from an intermediate device on the path, and to include a flag that allows fragmentation of the request message; sending the request message to the destination device via the intermediate device; receiving the reply message from the destination device or the at least one report message from the intermediate device responsive to the request message; and based on the reply message or the at least one report message, determining that fragmentation of the request message has occurred because the estimated PMTU is greater than an actual PMTU and updating the estimated PMTU. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification