US 2010/0306391 A1 · SINGLE-INTERFACE DYNAMIC MTU CONTROL

Abstract

Systems, methods, and computer media for loading initial maximum transmission unit (MTU) information and determining a destination host PMTU are provided. PMTU is the maximum data unit size that can be transmitted from a source host to a destination host because of a limiting component located somewhere in the path. Initial MTU values are determined from local and network sources, including a central repository, and loaded. A PMTU is then determined for a path between a source host and destination host by selecting an MTU value from the available values. If no MTU values are available for a destination host, a default value is used.

Claims16

Dependent claims

One or more computer storage media having computer-useable instructions embodied thereon for performing a method for determining a destination host path maximum transmission unit (PMTU), the method comprising:

from a source host, accessing one or more MTU lookup tables;
upon determining that an internet protocol (IP) address sub net prefix of the destination host is an entry in the one or more MTU lookup tables, selecting one entry to use as the PMTU between the source host and the destination host;
and
upon determining that an IP address sub net prefix of the destination host is not an entry in the one or more lookup tables, setting the PMTU between the source host and destination host to a default value.

1 more element

A path maximum transmission unit (PMTU) determination system comprising:

a central repository component containing an MTU lookup table, wherein the MTU lookup table is populated through at least one of:
receiving broadcasts from devices brought online, manual population, experimental discovery, and receiving information from a central repository in a different zone;
an MTU initialization component on a source host for loading local and network MTU information associated with an internet protocol (IP) address sub net prefix of a destination host,
wherein the MTU initialization component loads local MTU information from a local host file, and
wherein the MTU initialization component loads network information from the central repository;
and
a PMTU selection component on a source host for identifying a preferred entry to use as the PMTU between the source host and the destination host,
wherein upon determining that an IP address subnet prefix of the destination host is an entry in the one or more MTU lookup tables, the PMTU selection component selects one entry as the PMTU between the source host and the destination host.

5 more elements

Dependencies are inferred from the claim text.

Single-interface dynamic mtu control

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Single-interface dynamic mtu control

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Abstract

Claims16