Monitor unlimited number of servers
Filter log events
Create email and web-based reports

Direct access to Microsoft articles
Customized keywords for major search engines
Access to premium content

Event ID: 4 Source: b57nd60a

Source
Level
Description
Broadcom NetXtreme Gigabit Ethernet: The network link is down. Check to make sure the network cable is properly connected.
Comments
 
From a support forum for a similar problem:
This sounds like a link reset. Easiest way to find out is to grab an 8-port switch, and plug all the machines into that, then uplink to your router. If it is the router that's breaking things, this should isolate it. If it doesn't fix it, you could always return the switch.
From a support forum:
I have the same problem and found the problem is down to the Broadcom cards. In my case it is IBM servers connected to CISCO 3750 switches. When Auto sense is set, the Broadcoms cause the switch to reload. After setting the speed to 100 Mbps full the problem seems to be better but still getting the odd reload.

Windows Event Log Analysis Splunk App

Build a great reporting interface using Splunk, one of the leaders in the Security Information and Event Management (SIEM) field, linking the collected Windows events to www.eventid.net.

Read more...

 

Cisco ASA Log Analyzer Splunk App

Obtain enhanced visibility into Cisco ASA firewall logs using the free Firegen for Cisco ASA Splunk App. Take advantage of dashboards built to optimize the threat analysis process.

Read more...