Method and apparatus for receivability and reachability test...

Details Method and apparatus for receivability and reachability test... Method and apparatus for receivability and reachability test...

2005-01-28

2008-12-30

Chan, Wing F (Department: 2619)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S244000

Reexamination Certificate

active

07471679

ABSTRACT:
The present invention relates to method and apparatus for receivability test and reachability test of explicit multicast packet. In one embodiment, the xcast receivability test comprises i) at a sender end, sending a receivability probe packet to a receiver end, ii) at the receiver end, receiving the receivability probe packet, iii) generating an ICMP error message-Destination Unreachable, iv) sending the ICMP error message-Destination Unreachable to sender end, v) at the sender end, receiving the ICMP error message-Destination Unreachable and vi) analyzing the ICMP error message-Destination Unreachable.

REFERENCES:
patent: 6195751 (2001-02-01), Caronni et al.
patent: 6330236 (2001-12-01), Ofek et al.
patent: 6625773 (2003-09-01), Boivie et al.
patent: 2002/0145981 (2002-10-01), Klinker et al.
patent: 1998-025598 (1998-07-01), None
J. Postel, “Internet Control Message Protocol”, Network Working Group Request for Comments 792, Sep. 1981, pp. 1-7.

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