Token ring local area network testing apparatus for obtaining be

Details Token ring local area network testing apparatus for obtaining be Token ring local area network testing apparatus for obtaining be

1993-01-11

1994-11-08

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

370 855, 371 206, 371 291, H04J 314, H04L 1226, H04L 1242

Patent

active

053633660

ABSTRACT:
A token ring local area network (LAN) testing apparatus is provided. The apparatus includes hardware and software for keeping track of information related to the origination of a beacon frame that occurs due to a fault in the token ring. When a fault occurs in the token ring, a beacon frame is generated and this frame is useful in reporting the network domain or location that initiated the beaconing condition. This information is useful to the network manager in isolating the token ring fault. In addition to the first or original beacon frame, further or phantom beacon frames can be generated. These phantom beacon frames include those generated by other stations on the token ring experiencing a signal loss due to steps taken by the originating station as a result of the fault. These phantom domains are usually not beneficial to the network manager in isolating the fault on the token ring. The testing apparatus includes a software state machine for use in distinguishing the first beacon frame from phantom beacon frames. A display unit is able to display information from the first beacon frame and avoids displaying information associated with phantom beacon frames.

REFERENCES:
patent: 4633468 (1986-12-01), Skatrud et al.
patent: 4837488 (1989-06-01), Donahue
patent: 5023871 (1991-06-01), Nakayashiki et al.

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