> CentOS 5 uses kernel 2.6.18-xx ... If this PF_RING thing requires a different kernel, I think a more accurate statement would be, . > PF_RING is not supported on CentOS. Indeed. I wonder whether there exists some difference between CentOS kernel and genral kernel from www.kernel.org? If so, maybe I should download the CentOS kernel source code and patch it to run PF_RING. Any help? > > PowerEdge is Dell's brand name for ALL their Server products. That Ubuntu > bug was specific to the i450NX chipset, which was new in 1999 and obsoleted > circa 2001, and supported dual Xeon Pentium II/III processors, around > 300-800Mhz.. How old is your server??!? > My machine used to be installed PF_RING is exactly DELL PowerEdge 1950, with 8-core CPUs and 4G RAM, 80G disk. I don't think it is out of date.