unfortunately the realtek network adapters which included on most intel motherboard are not working with the rhel-5.2's kernel. see more info at: http://wiki.centos.org/AdditionalResources/HardwareList/RealTekRTL8101 http://wiki.centos.org/AdditionalResources/HardwareList/RealTekRTL8111b please include these two driver in the rhel kernel they haven't any problems and at least working while the rtl8139 shipped with rhel-5.2 are not (at least in many of our case, even if it's better then the rhel-5.1 version). thanks
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