Group address translation through a network bridge

Details Group address translation through a network bridge Group address translation through a network bridge

1989-03-22

1990-06-12

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

H04J 302

Patent

active

049339389

ABSTRACT:
A method for handling data frames by a bridge between a first network which implements group addressing and a second network which implements functional addressing but does not permit multiple group addressing. A first memory within the bridge receives data frames from the first network and from the second network. The data frames each have a destination address. A system memory within the bridge includes an address table and a translation table. Each entry in the address table has a first field which is a destination address and a second field which indicates if the destination address addresses more than a single station. When the first memory receives from the first network a first data frame having a first destination address, a system processor within the bridge searches the address table for the first destination address to determine whether the first destination address addresses more than a single station. If so, the system processor searches the translation table for a first group address which matches the first destination address and substitutes for the first destination address a first functional address corresponding to the first group address before forwarding the first data frame on the second network.

REFERENCES:
patent: Re31852 (1985-03-01), Soderblom
patent: 4718060 (1988-01-01), Oguchi et al.
patent: 4769814 (1988-09-01), Bederman et al.
patent: 4771286 (1988-09-01), Niessen et al.
patent: 4789982 (1988-12-01), Coden
"Draft Addendum to ANSI/IEEE Std 802.5-1988 Token Ring MAC & PHY Specification Enhancement for Multiple-Ring Networks", prepared by the IEEE 802.5 Rapporteur on Multiple-Ring Networks IEEE, Inc., Dec. 9, 1988, pp. 1-25.

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