DETECTING PATH MTU MISMATCH AT FIRST-HOP ROUTER

摘要

Embodiments of the present invention include systems and methods for detecting and correcting mismatches between a flow's size and the path maximum transmission unit (PMTU) size. In embodiments, a controller is notified of a new flow's size and compares that to the route path's MTU size. If the controller recognizes a mismatch, it informs an information handling device, such as the first-hop router, to notify the sender of the correct path MTU size—thereby effectively and efficiency notifying the sender to correct the MTU size for that flow.

主权项

1. A method for correcting path maximum transmission unit (PMTU) size mismatch comprising:
receiving from a host system a packet having an initial packet transmission unit size; forwarding at least some of the routing information of the packet including the initial routing transmission unit size to a controller; receiving a notification from the controller that the initial packet transmission unit size is a mismatch with a path maximum transmission unit size of a route determined by the controller; and notifying the host system of the mismatch between the initial packet transmission unit size and the path maximum transmission unit of the route.