3Com LANplex 6000 manual Source Routing SR

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TRSM Description

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nonvolatile RAM so they will survive a power loss or system initialization. Source Routed traffic is not forwarded while in this mode.

Source Routing (SR)

In Source Routing (SR), the packet contains information in the Route Information Field (RIF), which specifies the route the packet should follow in order to reach its destination. Through the process of route discovery, the packet determines various routes available and embeds this information as Ring Numbers and Bridge Numbers within the RIF. The bridge compares the RIF to its configured Bridge Numbers and Ring Numbers for each port and forwards the packet if appropriate. The TRSM utilizes one hop between any two ports on the module.

For Spanning Tree, the network mesh topology is reduced to a single path utilizing IEEE 802.1d Spanning Tree.

Transparent traffic is not forwarded while in this mode.

Source Routing Transparent (SRT)

The Source Routing-Transparent (SRT) operation complies with the 802.1d standard which provides bridging for both Source Routing and non-Source Routing protocols. It uses the Route Information Indicator to differentiate between SR and non-SR packets and applies the appropriate bridging method on each packet received.

To configure the Bridging mode, see Chapter 11: Administering the Bridge in the LANplex 6000 Administration Console User Guide. N

TRSM Configurable Protocol addresses on Token Ring are defined in non-canonical format while Protocol Translation FDDI is defined in canonical format. For a workstation on Token Ring to

Modes communicate with a server on FDDI, it is necessary to reformat or translate these embedded protocol address. The TRSM supports translation between Token Ring and FDDI for the following protocols: IP, IPX, NetBIOS, and SNA.

Translation is not necessary if FDDI is only used as a transport media between TRSMs. Since this feature may degrade performance, it is recommended that you disable the translation feature when FDDI is used solely as a transport media.

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Contents Token Ring Switching Module Installation Guide Trsm Description Source Routing SR Getting Started guide LANplex 6004 with Blank Faceplates Handles in Outward Position Ground Symbol for Static Discharge Guiding an Trsm Module into a LANplex Trsm Handles in Inward Inject Position Trsm Installation Trsm Diagnostic procedure RX+ LANplex 6000 Planning Your Site 3Com Corporation Bayfront Pla a Santa Clara, California 5052