System and methods for sending trace messages

Details System and methods for sending trace messages System and methods for sending trace messages

2005-07-26

2009-10-06

Pham, Chi H (Department: 2416)

Multiplex communications

Diagnostic testing

Path check

C370S252000, C370S236000

Reexamination Certificate

active

07599303

ABSTRACT:
A traceroute mechanism enables responses to the traceroute to reach the originating router (originator) along a multihop pseudowire (PW). A traceroute message includes an accumulator operable to count hops along a MH-PW, implemented as a time-to-live (TTL) field, as is known in the art. An originator router employs multiple TTL values, and decrements one of the TTL “accumulators” for each hop. At the ultimate (terminal) router defining the end of the multihop PW, a TTL in the return message is set to the number of hops traveled by the traceroute. The difference between the accumulator and the initial TTL value determines the number of hops traveled by the traceroute message, and hence the number of hops back to the originating node. The traceroute return message, now having a TTL set to the number of hops of the counterpart traceroute, reaches the originator when the TTL value is decremented to zero.

REFERENCES:
patent: 6538997 (2003-03-01), Wang et al.
patent: 6608833 (2003-08-01), Katsube et al.
patent: 6760309 (2004-07-01), Rochberger et al.
patent: 6958977 (2005-10-01), Mitrani et al.
patent: 7304954 (2007-12-01), Gupta et al.
patent: 7443801 (2008-10-01), Neidhardt et al.
patent: 7450582 (2008-11-01), Suh et al.
patent: 7519006 (2009-04-01), Wing
patent: 2004/0081101 (2004-04-01), Bennett
patent: 2004/0141527 (2004-07-01), Bennett et al.
patent: 2005/0015647 (2005-01-01), Okada et al.
patent: 2005/0018647 (2005-01-01), Lebrun et al.
patent: 2005/0099948 (2005-05-01), Wakumoto et al.
patent: 2005/0135257 (2005-06-01), Stephens et al.
patent: 2005/0265356 (2005-12-01), Kawarai et al.
patent: 2006/0072479 (2006-04-01), Loyd
patent: 2007/0115840 (2007-05-01), Feick et al.

Affiliated with

Also associated with

Rating

System and methods for sending trace messages does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and methods for sending trace messages, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and methods for sending trace messages will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4100652