ETHERNET MANAGEMENT MODULE OVERVIEW
EMME USER’S GUIDE
Page 1-5
Table 1-1 provides a list of the MMAC-FNB chassis where shunting
capabilities are set at the factory.
1.2.2 Repeater Interface Controller Media Interface
Modules
Cabletron Systems’ MultiChannel family of Media Interface Modules
(MIMs) includes the Repeater Interface Controller (RIC), which is an
IEEE 802.3 compliant multi-port repeater. You can configure these
modules to operate on either the Ethernet B or C bus, via hardware
jumpers or management software. Software management overrides any
hardware configuration setting.
RIC technology provides the MIM with an inter-RIC bus, allowing
multiple RIC MIMs communicating over the RIC bus to act as a single
logical repeater. For example, an Ethernet frame taking a path from one
RIC MIM, to the Inter-RIC bus, to another RIC MIM (the frame being
retimed and regenerated to all ports from the last RIC MIM) has a path
cost equivalent to only one repeater hop. Since Ethernet networks are
limited to four serially linked repeaters, using the RIC repeater offers a
significant advantage. By using cascading RIC MIMs, each of which
support at least 13 cable segments, you can build a much larger network
than you could with stand-alone repeaters.
Table 1-1. MMAC-FNB Chassis
MMAC-FNB Chassis
Serial No.
MMAC-3FNB
FC
000000000 or above
MMAC-5FNB
CC
000000000 or above
MMAC-8FNB
CG
000000000 or above
MMAC-M3FNB
ALL
MMAC-M5FNB
ALL
MMAC-M8FNB
DK
000000000 or above
