- Alcatel Internetworking, Inc. Switch Troubleshooting Guide

Chassis Management Module (CMM)
OmniSwitch Troubleshooting Guide September 2005 page -33
• Fabric resides independent of the CMM. It resides at the Back of the Chassis. CMM can fail over inde-
pendent of Switching Fabric and vice versa.
• Minimum of 4 Switching Fabric Modules (SFM) with 8 ROMS chips are required to operate. The
additional SFM provides (4+1) redundancy.
• FBUS is not connected to the CMMs
• BBUS is connected to both the CMMs and all the NI in the chassis including the SFMs.
• Up to 64 Coronados can be connected to each ROMA
•
Eagle Overall Block Diagram
R
R
R
R
R
R
R
R
R
R
NI
NI
NI
NI
NI
….
CMM CMM
BBUS
Fabric Boards
FBUS
…. Secondary
…. Primary
Redundant Fabric Module