Ethernet Channels A, B, C, And D - Cabletron Systems EMME User Manual

CHAPTER 1: INTRODUCTION

1.2.3 Ethernet Channels A, B, C, and D

The EMME supports up to four Ethernet channels, provides management
for the four channels, and bridging between the ports. The four EMME
Ethernet channels access the same shared memory so that bridging
between the channels occurs concurrently.
TPMIM, FOMIM, and THNMIM - The EMME provides repeater
functionality for these Cabletron Systems non-repeater Media Interface
Modules by using Ethernet channel A on the MMAC backplane to
transmit and receive data.
TPRMIM, FORMIM, and CXRMIM - Ethernet channels B and C
transmit and receive packets over the Repeater Interface Controller (RIC)
management bus on the FNB to these Cabletron Systems RIC MIMs.
These MIMs can repeat packets autonomously without channeling them
through the EMME.
Third Party MIMs - The EMME recognizes the third party MIMs listed
below and provides each module with support concerning the statistics on
the backplane and the control of channel selection for the entire module:
• CSMIM2 - With supported connectivity for channels A, B, or C in an
FNB chassis.
• MODMIM - With supported connectivity for channels A, B, or C in
an FNB chassis.
• CRM-3E - With supported connectivity for channels A, B, or C in an
FNB chassis.
• PCMIM - With supported connectivity for channel A in any MMAC
chassis.
• SNACMIM-E - With supported connectivity for channel A in any
MMAC chassis.
Page 1-6 EMME USER'S GUIDE