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xii OmniSwitch Troubleshooting Guide September 2005
Calendar Manager Module ....................................................................................A-19
Data Port Output Module ......................................................................................A-19
Nantucket Redundancy .........................................................................................A-19
Roma ............................................................................................................................A-22
Functional Description ..........................................................................................A-23
Initialization ....................................................................................................A-24
NI Slot Insertion .............................................................................................A-25
Setup Calendars and Flow Control for New NI .............................................A-25
NI Slot Extraction ...........................................................................................A-25
CMM Takeover and Hot Swap .............................................................................A-25
Framing Error ........................................................................................................A-26
Chassis Management Module (CMM) .........................................................................A-26
OS7000 CMM .......................................................................................................A-27
OS8800 CMM .......................................................................................................A-27
Functional Description of CMM ...........................................................................A-28
CMM Software Startup Process .....................................................................A-28
AOS ................................................................................................................A-29
MiniBoot ........................................................................................................A-30
AOS Start ........................................................................................................A-30
Chassis Manager Component of System Services ................................................A-30
CMM Reload of NI Module ..................................................................................A-30
Overall System Architecture .................................................................................A-32
Packet Walk .................................................................................................................A-34
Packet Walk Principles ..........................................................................................A-34
Data Flow Overview .............................................................................................A-34
Specific Packet Flows ..................................................................................................A-35
Unknown L2 Source, Known L2 Destination .......................................................A-35
The Catalina ASIC .........................................................................................A-35
The Coronado ASIC .......................................................................................A-35
The Nantucket ASIC ......................................................................................A-35
The Coronado ASIC .......................................................................................A-35
The Catalina ASIC .........................................................................................A-35
Unknown Destination ...................................................................................................A-36
Known L2 Source, Unknown L2 Destination .......................................................A-36
The Catalina ASIC .........................................................................................A-36
The Coronado ASIC .......................................................................................A-36
The Nantucket ASIC ......................................................................................A-36
The Coronado ASIC .......................................................................................A-37
The Catalina ASIC .........................................................................................A-37
Traffic is Being Passed; the Switch is Attempting to Put a Correct L2 DA
Entry on the NI .....................................................................................................A-37
The Coronado ASIC .......................................................................................A-37
Unknown L3 DA ...................................................................................................A-38
The Coronado ASIC .......................................................................................A-38
Hardware Buses on OmniSwitch 7700/7800/8800 Switches .......................................A-41
Xybus ....................................................................................................................A-41
Fbus .......................................................................................................................A-41
Bbus .......................................................................................................................A-41