Hi Linuxers,
sorry to post this in 3 different news-groups, but I have no clou which group would be the right one to ask.
I have a problem with UML and networking. I try to setup a network connection between the UML virtuel machine and the host but I don't get connection between them.
I can configure the eth0 device within UML using ifconfig and I see the tap-device on the host. Seems to me, that the UML helper programs (like uml_net) are working. Both interfaces (UML and host) are up and routes are configured to the devices with the apropriate network-addresses.
If I start tcpdump on both 'machines' and try pings between them, I can see ARP-requests at the origin. But I don't receive any tcpdump output at the destination and the target is unreachable.
What can I do/check to get the connection working ? Could there be something missing within the host kernel ?
By the way, yes I know I can mount the host's filesystem on the UML virual machine, but this is not what I want or need. I need the possibility to initiate commands (e.g. via rsh) at the UML machine from the/a host.
Any help/suggestion is welcome.
Thanks in advance Guenter
The facts:
host-kernel: linux 2.4.18 UML-kernel: user_mode_linux-2.4.18.36um-0 executable downloaded form UML homepage (rpm package) command on host: ping 192.169.10.10 command on UML: ping 192.168.10.100
ifconfig from host:
------------------- eth0 Link encap:Ethernet HWaddr 00:04:76:EA:99:46 inet addr:129.23.12.160 Bcast:129.23.15.255 Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5969070 errors:0 dropped:0 overruns:81 frame:0 TX packets:6075222 errors:0 dropped:0 overruns:0 carrier:0 collisions:691821 txqueuelen:100 RX bytes:2746909112 (2619.6 Mb) TX bytes:2242485986 (2138.6 Mb) Interrupt:11 Base address:0x3400
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:21075 errors:0 dropped:0 overruns:0 frame:0 TX packets:21075 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1602048 (1.5 Mb) TX bytes:1602048 (1.5 Mb)
tap0 Link encap:Ethernet HWaddr FE:FD:00:00:00:00 inet addr:192.168.10.100 Bcast:192.168.10.255 Mask:255.255.255.255 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:148 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:17840 (17.4 Kb) Interrupt:5
ifconfig from UML:
------------------ eth0 Link encap:Ethernet HWaddr FE:FD:C0:A8:0A:0A inet addr:192.168.10.10 Bcast:192.168.10.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1484 Metric:1 RX packets:1 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:28 (28.0 b) TX bytes:264 (264.0 b) Interrupt:5
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:18 errors:0 dropped:0 overruns:0 frame:0 TX packets:18 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1628 (1.5 Kb) TX bytes:1628 (1.5 Kb)
route from host:
---------------- Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.10.0 * 255.255.255.0 U 0 0 0 tap0 mchm_32 * 255.255.252.0 U 0 0 0 eth0 loopback * 255.0.0.0 U 0 0 0 lo default mmma.ma. 0.0.0.0 UG 0 0 0 eth0route from UML:
--------------- Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.10.0 * 255.255.255.0 U 0 0 0 eth0