Method and system for determining path maximum transfer unit for IP multicast
US7697524B2 · kind B2 · utility
13Cited by
9References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2005 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Aug 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for determining path maximum transfer unit (PMTU) in an Internet Protocol (IP) multicast is described. If a packet of a size greater than the MTU of any link of a path, with its Don't Fragment (DF) bit set, is sent by the source, the packet is dropped and an ICMP message, stating “Destination unreachable, DF bit set”, is sent to the source. The rate of messages to the source is controlled to avoid implosion of traffic. In response to the messages, the source sends multicast probe packets of multiple sizes to multicast distribution tree to determine its PMTU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.