General Network Characteristics

• Completely reliable

• Occasional bit errors

• Frequent bit errors

• Truncated packets

• Misrouted packets

• Delayed packets

• Reordered packets

• Lost packets

• Duplicated packets

• Replay of messages

• Performance

None? (ASCI Red)

Myrinet

Ethernet

Myrinet switch resets

IP guards against that

due to congestion, long path

multiple paths

IP routers when flooded

Retransmission

Due to delayed packets (protocol)

“Mysterious” slowdowns

Level of reliability

Examples

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