Well, I have somekind of nasty problem on sun fire x2100 server. Performance it so poor that it is unusable for any kind of filetransfer, about 1/10 of speed is archieved. for example transferring files from ftp.funet.fi/dev lftp ftp.funet.fi:/dev> mget 1GBnull `1GBnull' at 3097136 (0%) 268.1K/s eta:65m [Receiving data] and on other machine on same network: ftp ftp.funet.fi:/dev> mget 1GBnull `1GBnull' at 28320240 (2%) 1.26M/s eta:13m [Receiving data] I have tested this issue on two sun fire x2100 series, so I can think that issue is not failty network card, but this sounds like bug network driver on x86_64? How to resolve this? card is : eth0: Tigon3 [partno(BCM95721) rev 4101 PHY(5750)] (PCI Express) 10/100/1000Base-T Ethernet 00:e0:81:5e:4a:94 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] Split[0] WireSpeed[1] TSOcap[1] eth0: dma_rwctrl[76180000] dma_mask[64-bit] tg3: eth0: Link is up at 100 Mbps, full duplex. tg3: eth0: Flow control is off for TX and off for RX. and kernel: Linux y 2.6.20-gentoo #3 Mon Feb 12 19:16:29 EET 2007 x86_64 AMD Opteron(tm) Processor 146 GNU/Linux other network card works fine on machine and it has no performance issues. Problem also exists in older kernel .18 thanks for any help. -- Eero - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html