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Route Discovery in Bridging Ethernet-Based Network to Token Ring Network

IP.com Disclosure Number: IPCOM000115978D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Baker, MC: AUTHOR [+3]

Abstract

A method for discovering a route to a token ring node from a ethernet-based node via an access point is disclosed. The access point discovers the route to the token ring node by sending out a IEEE 802.2 TEST command frame as an All Route Broadcast (ARB) token ring frame to the token ring node.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Route Discovery in Bridging Ethernet-Based Network to Token Ring
Network

      A method for discovering a route to a token ring node from a
ethernet-based node via an access point is disclosed.  The access
point discovers the route to the token ring node by sending out a
IEEE 802.2 TEST command frame as an All Route Broadcast (ARB) token
ring frame to the token ring node.

Definitions
  o  Access Point (AP) - A networking entity that bridges between a
      token ring network and an ethernet-based network.  The AP is
      responsible for all frame conversions between the two different
      networks.
  o  Ethernet-based network - A term used in this description to
      describe any LAN (Local Area Network) whose MAC (Media Access
      Control) frame resembles an Ethernet DIX V2 or IEEE 802.3 style
      frame.  Such LAN may use an ethernet, infrared, or radio
      frequency physical layer to connect individual nodes.
  o  Ethernet-based node - A term used in this technical disclosure
to
      describe any node that resides in the Ethernet-based network.

      The described invention requires the token ring node to support
the IEEE 802.2 LLC (Logical Link Control) protocol.  When an AP
receives a data frame from the ethernet-based network that needs to
be forwarded to the token ring network, it checks to see if it
already knows the route to the destined token ring node.  If the
answer is yes, it will send the data frame to the destined token ring
node using the known route.  If the answer is no, it sends out a IEEE
802.2 TEST command frame as an ARB (All Route Broadcast) token ring
frame to the destined token ring node before forwarding the...