Describing Bridge-Only Mode Capabilities - Cabletron Systems TRBMIM-T User Manual

Token ring bridge/management module

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INTRODUCTION

1.4.1 Describing Bridge-Only Mode Capabilities

The Bridge-Only mode is the default operational mode for the

TRBMIM-T. When in the Bridge-Only mode, the TRBMIM-T serves

exclusively as a source-route bridge in the MMAC for linking separate

Token Rings. It neither automatically segments the FNB backplane nor

performs any of the ring-management functions available when operating

in the optional dual-function Bridge/Management mode.

The ring identiﬁers, Ring 1 and Ring 2, in the following

NOTE

examples are used for illustrative purposes only. They are not

intended to reﬂect or recommend an actual ring numbering

scheme. See the TRBMIM/TRBMIM-T Local Management

User's Guide for information on FNB and Station port ring

numbers.

Bridging Token Rings In The Same MMAC

Figure 1-2 illustrates how the TRBMIM-T can be used to bridge Ring 1

and Ring 2 in the same MMAC. In this conﬁguration the TRBMIM-T's

FNB port is connected to Ring 2. Its front-panel bridge Station port is

connected to Ring 1 via cable to any lobe port on any MIM on Ring 1.

The TRMMIM is managing Ring 2.

Ring 2

Ring Managed By TRMMIM

Figure 1-2 Bridging Token Rings in the Same MMAC

1-6

Bisected MMAC FNB Backplane

Ring 1

Ring Managed By TRMM

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