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Event ID: 4 Source: b57w2k

Broadcom NetXtreme Gigabit Ethernet: The network link is down. Check to make sure the network cable is properly connected.
See the comments for event id 4 from B57NT4.
After this, there should normally be an Information Event, for example "Broadcom NetXtreme Gigabit Ethernet: Network controller configured for 100Mb half-duplex link”. Therefore, this event is only a disconnected or link down warning.

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