Systems and methods for path maximum transmission unit discovery
AssigneeDell Products L.P.
InventorSumanta Das Gajendra Mahapatra
Life of this patent
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Abstract
An information handling system is provided. The information handling system includes a plurality of network devices. One of the plurality of network devices is a source device and another of the plurality of network devices is a destination device. If path maximum transmission unit (PMTU) information for a path between the source device and the destination device is not known, the source device sends a PMTU send packet to the destination device, and the destination device sends a PMTU receive packet with a received PMTU value to the source device. Other associated systems and methods for PMTU discovery are also provided.
Claims20
An a first network device in an information handling system, the first network device comprising:
- a plurality of ports for sending and receiving packets, at least one of the ports having an associated maximum transmission unit equal to a first value;
- one or more processors in communication with the plurality of ports;
- and
- a memory in communication with the one or more processors, the memory including a path maximum transmission unit (PMTU) table that associates each of a plurality of destination addresses with a maximum transmission unit (MTU) value in an MTU field;
- and wherein:
- the first network device is configured to send a PMTU send packet when a particular destination address not having an associated MTU value in an associated MTU field of the PMTU table is to be accessed.
An information handling system comprising:
- a first network device, the first network device being a source device;
- a second network device, the second network device being a destination device;
- and
- at least one intermediate network device, the source device, the destination device, and the at least one intermediate network device being part of a plurality of network devices, wherein:
- if path maximum transmission unit (PMTU) information for a path between the source device and the destination device is not known, the source device sends a PMTU send to the destination device, the destination device sends a PMTU receive packet with a received PMTU value to the source device.
A method for determining a maximum transmission unit (MTU) of a path between a source network device and a destination network device, the method comprising:
- transmitting a path maximum transmission unit (PMTU) send packet with an initial PMTU value from the source network device to the destination network device;
- transmitting a PMTU receive packet from the destination network device to the source network device, the PMTU receive packet including a received PMTU value;
- updating a PMTU table on the source network device with the received PMTU value included in the PMTU receive packet.
Dependencies are inferred from the claim text.