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Network Connectivity Lost After Applying ESX Server 2.5 Patch 1 (Build 12883) (1612)


After applying ESX Server 2.5 Patch 1 (Build 12883), why do I lose my network connections?


ESX Server 2.5 Upgrade Patch 1 has been withdrawn because it installed the incorrect version of a Broadcom device driver. You must install ESX Server 2.5 Upgrade Patch 2 if both of the following conditions apply to your system:
  • Your system contains Broadcom networking interface hardware
  • You have previously installed ESX Server 2.5 Upgrade Patch 1
VMware has confirmed that affected systems include:
  • IBM x-Series 336
  • IBM x-Series 346
  • Dell PowerEdge 2850
  • Fujitsu-Siemens RX300
However, systems using other Broadcom networking interface hardware could be affected by installing Patch 1. Users who did not install Patch 1 are not required to install Patch 2, regardless of the model of networking hardware they are using. To download and install ESX Server 2.5 Patch 2, please see


1612; adaptor; NIC; module

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