Browse Prior Art Database

Validation of the Single-Route Broadcast in Token Rings

IP.com Disclosure Number: IPCOM000101107D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 80K

Publishing Venue

IBM

Related People

DonCarlos, B: AUTHOR [+2]

Abstract

The objective of the single-route broadcast function is to enable a ring station to send a broadcast frame to one or more destination stations. This broadcast frame will go to all rings in such a way that all the destination stations will receive the frame once and only once. This is contrary to a general broadcast frame where it will go to all rings through all available paths such that a destination station will receive multiple copies of the same frame if there are multiple paths between the sending station and the destination station.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 53% of the total text.

Validation of the Single-Route Broadcast in Token Rings

       The objective of the single-route broadcast function is
to enable a ring station to send a broadcast frame to one or more
destination stations.  This broadcast frame will go to all rings in
such a way that all the destination stations will receive the frame
once and only once.  This is contrary to a general broadcast frame
where it will go to all rings through all available paths such that a
destination station will receive multiple copies of the same frame if
there are multiple paths between the sending station and the
destination station.

      In order to achieve this objective, the following were defined
in the token ring architecture:
   o    Define a single-route (limited) broadcast indicator in a
frame to distinguish it from a general broadcast frame.
   o    Configure certain bridges to forward single-route braodcast
frames.  For example, if there are multiple bridges between two
rings, one of these bridges will be designated to forward the
single-route braodcast frames.

      There are various applications for the single-route braodcast
frames; for example, broadcast to a group address or functional
address, interconnection between token-ring and spanning-tree
bridges, reducing the unnecessary traffic, etc.

      Each bridge in the network must be set to carry the
single-route broadcast frames.  As the network size grows and with
more bridges added, the complexity of th...