Specifications

EMME/EMM-E6
Introduction EMME/EMM-E6
1-2 Management Module Guide
EMME/EMM-E6
The EMME (Ethernet Management Module for Ethernet) and EMM-E6
(Ethernet Management Module for Ethernet with six ports) are multi-port
intelligent bridging modules installed in the right most slot of an MMAC FNB
chassis. They have channels which act as bridge ports (Channels A, B, C, D, E,
and F). Channels A, B, and C also act as repeater ports and direct traffic over
the MMAC Flexible Network Bus (or backplane). Additionally, Cabletron
Systems FDDI modules for the MMAC FNB provide Ethernet to Fiber
Distributed Data Interface (FDDI) bridging capabilities.
With the addition of Repeater Management Control module (RMIM)in the
chassis, the EMME and EMM-E6 function as bridges between up to three
Ethernet 802.3 subnetworks and an Ethernet backbone (fourth) network. The
Repeater MIMs use and control Channels B and C. Other modules use
Channel A and are controlled by the EMME or EMM-E6. Channels D1 and D2
are the AUI ports on the EMME and EMM-E6, and direct traffic to one of two
external Ethernet Port Interface Modules (EPIMs). One D port is operational
at a time, while the other D port is the redundant port and is in STDBY
(standby) or OFF .
The EMM-E6 allows you to monitor, configure, and bridge/route between
channels A, B, and C on the backplane, a fourth external Ethernet via an
EPIM, and two BRIM ports. Optional BRIMs perform the same bridging
functions as EPIMs; they transfer packets between different channels.
However, unlike EPIMs, BRIMs bridge these packets from one technology to
another (e.g., Ethernet to FDDI network backbones, Asynchronous Transfer
Mode [ATM] to Wide Area, etc.). These BRIMs occupy the E and F channels.
The following BRIMs may be installed:
• BRIM-E6 : Ethernet interface
• BRIM-W6 : WAN interface (not supported at this time)
• BRIM-A6 : ATM interface
• BRIM-F6: FDDI interface