Hello Christopher , Try changing the eth1 address to 133.27.179.225 (133.27.179.224 is the Network address) . Hth , JimL On Mon, 5 Nov 2001, Lee Hock Nang, Don wrote: > > I'm still trying to visualise the layout of the network and eth's. ;) > It very hard to digest from words, still prefer diagrams. :) > > Anyway, from the rough look of it, your problem might be in yr route table. Check the default gateway value, and the route table entries especially on the eth1 which shows 133.27.179.224 (I believe it should be a network address 133.27.179.0) > > Someone out there pls correct me if I'm wrong about this. > > Don > > > > > > >>> Christopher Penrose <penrose@sfc.keio.ac.jp> 11/05/01 04:37PM >>> > If this message is inappropriate in this forum I apologize. > > I am trying to create a 16 node (netmask 255.255.240.0) subnet with a > linux box as a router. > > I have a i586 running the linux kernel 2.4.13. My distribution is > Redhat 7.0. I have two EtherExpressPro cards in my machine. I have had > the same difficulty with a 2.4.5 and a 2.2.x kernel. > > Throughout the scattered Linux networking literature it is often > flippantly remarked that turning on interface forwarding is a snap: > > cat > /proc/sys/net/ipv4/ip_forward > "1" > > is supposed to do the trick. Unfortunately, it does not do the desired > trick. > > When I turn on forwarding as I have above, I can ping the router > (133.27.179.224 or 133.27.16.221) from a host (133.27.179.226) on the > eth1 subnet. However, pings are never returned to this subnet host > (133.27.179.226) if they are bound for hosts on the eth0 network > (133.27.16.x) or beyond. Furthermore, pings from the linux router > (133.27.179.224 and 133.27.16.221) to the subnet host (133.27.179.226) > are never returned. > > Is there something obvious that I am missing? Is there something arcane > I am missing? > > Here is my configuration: > > % ifconfig > > eth0 Link encap:Ethernet HWaddr 00:02:B3:3D:59:14 > inet addr:133.27.16.221 Bcast:133.27.19.255 > Mask:255.255.252.0 > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:17048 errors:0 dropped:0 overruns:0 frame:0 > TX packets:46 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:100 > Interrupt:10 Base address:0x2000 > > eth1 Link encap:Ethernet HWaddr 00:02:B3:3D:44:2A > inet addr:133.27.179.224 Bcast:133.27.179.239 > Mask:255.255.255.240 > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:0 errors:0 dropped:0 overruns:0 frame:0 > TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:100 > Interrupt:9 Base address:0x4000 > > lo Link encap:Local Loopback > inet addr:127.0.0.1 Mask:255.0.0.0 > UP LOOPBACK RUNNING MTU:16436 Metric:1 > RX packets:6 errors:0 dropped:0 overruns:0 frame:0 > TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:0 > > > % route -n > > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use > Iface > 133.27.179.224 0.0.0.0 255.255.255.240 U 0 0 0 > eth1 > 133.27.16.0 0.0.0.0 255.255.252.0 U 0 0 0 > eth0 > 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 > lo > 0.0.0.0 133.27.16.1 0.0.0.0 UG 0 0 0 > eth0 > > > - > : send the line "unsubscribe linux-net" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > - > : send the line "unsubscribe linux-net" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > +------------------------------------------------------------------+ | James W. Laferriere | System Techniques | Give me VMS | | Network Engineer | P.O. Box 854 | Give me Linux | | babydr@baby-dragons.com | Coudersport PA 16915 | only on AXP | +------------------------------------------------------------------+ - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
