Loopback mechanism for frame relay OAM

Details Loopback mechanism for frame relay OAM Loopback mechanism for frame relay OAM

1996-05-23

1998-04-14

Safourek, Benedict V.

Multiplex communications

Diagnostic testing

Loopback

370246, 371 205, 375213, 375224, H04B 1702

Patent

active

057401594

ABSTRACT:
A loopback mechanism uses frame relay OAM loopback frames which eliminate the need for location identifiers and reduces overhead and complexity. The frames replace source and destination loopback location identifiers by a loopback indicator field, a send node count field and a return node count field. The originating node of the loopback procedure sets the number of intermediate frame relay nodes to be traversed. The intermediate frame relay nodes simply increment or decrement the node count, depending on the direction of the loopback frame.

REFERENCES:
patent: 4161635 (1979-07-01), Wolaver
patent: 4737949 (1988-04-01), Yamamoto
patent: 5289474 (1994-02-01), Purcell et al.
patent: 5450394 (1995-09-01), Gruber et al.
patent: 5659540 (1997-08-01), Chen et al.
"Simplified Loopback Procedures for Frame Relay OAM", Khalid Ahmad et al, CANCOM 13-23, ITU-T Study Group 13, Geneva, Switzerland, Jul. 10-21, 1995.
"Frame Relaying Operation and Maintenance Principles", ITU Telecommunication Standardization Sector, Study Group 13, Standard T1S1.2/94-031R1, Mar. 1994.
"Frame Relay Operation and Maintenance Principles and Functions", ITU-T Telecommunication Standardization Sector, Study Group 13, Draft Recommendation 1.620, Temporary Document 32-E (WP1/13), Geneva, Switzerland, Jul. 1995.

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