Method and system for determining path maximum transfer unit for IP multicast

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United States of America Patent

PATENT NO 7697524
APP PUB NO 20060221844A1
SERIAL NO

11099787

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CISCO TECHNOLOGY, INC.SAN JOSE, CA14590

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jayaraman, Anand Chennai, IN 2 25
Subramanian, Srinivas San Jose, US 8 193
Venkataswami, Balaji Venkat Chennai, IN 36 291

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