Testing a communications network for duplicate station addresses
US5283571A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Oct 1, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus to detect stations having duplicated addresses, the stations of the type connected in a computer communications network, the stations of the type capable of having an assigned address and having a list of addresses for comparison with a destination address field of a frame detected on the network is disclosed. The apparatus does a transmit self test, and sets a self indicator to "pass" in the event that the self test frame is received, and sets the self indicator to "timeout" in the event that a timeout occurs. The apparatus does a neighbor response test, and sets a neighbor indicator to "timeout" in the event that a timeout occurs, and sets the neighbor indicator to "pass" in the event that a received response frame indicates no destination address match, and sets the neighbor indicator to "fail" in the event that a received response frame indicates that a destination address match did occur. The apparatus tests both the self indicator and the neighbor indicator, and in response to the testing of the self indicator and the testing of the neighbor indicator sets a duplicate address indicator in one of three states, a first state of the three states indicating that ther…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.