15.12.2011 02:33, Andrea Venturoli пишет: > Hello. > > I recently installed 8.2 with the following card: > > > dmesg > > ... >> fxp0: <Intel 82550 Pro/100 Ethernet> port 0xdc00-0xdc3f mem >> 0xfebfb000-0xfebfbfff,0xfebc0000-0xfebdffff irq 20 at device 5.0 on pci4 > > ... > > pciconv -lv > > ... >> fxp0@pci0:4:5:0: class=0x020000 card=0x00408086 chip=0x12298086 >> rev=0x0c hdr=0x00 >> vendor = 'Intel Corporation' >> device = '82550/1/7/8/9 EtherExpress PRO/100(B) Ethernet Adapter' >> class = network >> subclass = ethernet > > ... > > I had weird problems, especially due to ICMP/fragmentation/MTU/... issues. > After hours spent in debugging, I noticed tcpdump showing ICMP packets > with wrong checksums and that TSO4 was enabled. > "ifconfig fxp0 -tso" seemed to solve everything. > > > Don't know if it's a bug in the card, in the driver or what... > Maybe it shouldn't be enabled by default?
Do you use NAT? man ipfw clearly states: ipfw nat is not compatible with the TCP segmentation offloading (TSO). Thus, to reliably nat your net- work traffic, please disable TSO on your NICs using ifconfig(8) Eugene Grosbein _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"