A most puzzling network
conundrum has arisen while I was attempting to create a virtual network behind
a virtual router which in turn connects the virtual network to my real network.
My machine (192.168.103.23)
is on the network with my router (192.168.103.1). The virtual router,
tiara, has to connect my
192.168.103.* network with
the virtual 10.0.0.* network which comprises two other virtual domains, tophat
and bowler.
The three virtual machines
are all running Fedora (hence the names).
I can ping between tiara,
tophat, and bowler. I can also ping from tiara out to 192.168.103.1,
192.168.103.23, and the Internet.
However, I cannot ping
192.168.103.23, 192.168.103.1, or the Internet from tophat or bowler (which are
routed through tiara).
I am reasonable certain that
the problem has nothing to do with Domain-0. In fact, I am almost
positive that the guilt here rests on tiara. Tiara is apparently not
passing packets from one of its ethernet cards to the other.
To further puzzle things,
bowler and tophat are able to ping exactly two IP addresses on the
192.168.103.* network:
[root@localhost ~]# ping
192.168.103.0
PING
192.168.103.0 (192.168.103.0) 56(84) bytes of data.
64 bytes from 192.168.103.30:
icmp_seq=0 ttl=64 time=1.00 ms
64 bytes from
192.168.103.30: icmp_seq=1 ttl=64 time=0.218 ms
64 bytes from
192.168.103.30: icmp_seq=2 ttl=64 time=0.158 ms
64 bytes from
192.168.103.30: icmp_seq=3 ttl=64 time=0.170 ms
64 bytes from 192.168.103.30:
icmp_seq=4 ttl=64 time=0.156 ms
--- 192.168.103.0 ping
statistics ---
5 packets transmitted, 5
received, 0% packet loss, time 4007ms rtt min/avg/max/mdev =
0.156/0.341/1.007/0.334 ms, pipe 2
[root@localhost ~]# ping
192.168.103.30
PING
192.168.103.30 (192.168.103.30) 56(84) bytes of data.
64 bytes from
192.168.103.30: icmp_seq=0 ttl=64 time=1.18 ms
64 bytes from
192.168.103.30: icmp_seq=1 ttl=64 time=0.173 ms
64 bytes from
192.168.103.30: icmp_seq=2 ttl=64 time=0.160 ms
64 bytes from
192.168.103.30: icmp_seq=3 ttl=64 time=0.177 ms
64 bytes from
192.168.103.30: icmp_seq=4 ttl=64 time=0.194 ms
--- 192.168.103.30 ping
statistics ---
5 packets transmitted, 5
received, 0% packet loss, time 4007ms rtt min/avg/max/mdev =
0.160/0.376/1.180/0.402 ms, pipe 2
Upon examination, it becomes
apparent that tiara is, in fact, replying to pings at both 192.168.103.30 and
192.168.103.0 (and 10.0.0.1, of course).
Any suggestions on how to
fix tiara would be greatly appreciated. I have tried everything I could
think to try.
The ifconfig and route
results for all three virtual machines are attached below.
Ernie E Fontes
-----------tiara:-----------
[root@localhost ~]# ifconfig
eth0
Link encap:Ethernet HWaddr AA:00:00:27:00:F5
inet addr:192.168.103.30 Bcast:192.168.103.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:926 errors:0 dropped:0 overruns:0 frame:0
TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:121636 (118.7 KiB) TX bytes:1560 (1.5 KiB)
eth1
Link encap:Ethernet HWaddr AA:00:00:4C:48:35
inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:755 errors:0 dropped:0 overruns:0 frame:0
TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:105949 (103.4 KiB) TX bytes:414 (414.0 b)
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:0 errors:0 dropped:0 [root@localhost ~]# ping 192.168.103.0 PING
192.168.103.0 (192.168.103.0) 56(84) bytes of data.
64 bytes from
192.168.103.30: icmp_seq=0 ttl=64 time=1.00 ms
64 bytes from
192.168.103.30: icmp_seq=1 ttl=64 time=0.218 ms
64 bytes from
192.168.103.30: icmp_seq=2 ttl=64 time=0.158 ms
64 bytes from
192.168.103.30: icmp_seq=3 ttl=64 time=0.170 ms
64 bytes from
192.168.103.30: icmp_seq=4 ttl=64 time=0.156 ms
--- 192.168.103.0 ping
statistics ---
5 packets transmitted, 5 received,
0% packet loss, time 4007ms rtt min/avg/max/mdev = 0.156/0.341/1.007/0.334 ms,
pipe 2 [root@localhost ~]# ping 192.168.103.30 PING 192.168.103.30
(192.168.103.30) 56(84) bytes of data.
64 bytes from
192.168.103.30: icmp_seq=0 ttl=64 time=1.18 ms
64 bytes from
192.168.103.30: icmp_seq=1 ttl=64 time=0.173 ms
64 bytes from
192.168.103.30: icmp_seq=2 ttl=64 time=0.160 ms
64 bytes from
192.168.103.30: icmp_seq=3 ttl=64 time=0.177 ms
64 bytes from
192.168.103.30: icmp_seq=4 ttl=64 time=0.194 ms
--- 192.168.103.30 ping
statistics ---
5 packets transmitted, 5
received, 0% packet loss, time 4007ms rtt min/avg/max/mdev =
0.160/0.376/1.180/0.402 ms, pipe 2 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[root@localhost ~]# route
Kernel IP routing table
Destination
Gateway
Genmask Flags Metric
Ref Use Iface
192.168.103.0
*
255.255.255.0 U
0 0 0
eth0
10.0.0.0
*
255.0.0.0 U
0 0 0
eth1
default
192.168.103.1
0.0.0.0 UG
0 0 0
eth0
-----------bowler:-----------
[root@localhost ~]# ifconfig
eth0
Link encap:Ethernet HWaddr AA:00:00:0C:15:FC
inet addr:10.0.0.3 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1108 errors:0 dropped:0 overruns:0 frame:0
TX packets:145 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:147230 (143.7 KiB) TX bytes:13562 (13.2 KiB)
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:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:660 (660.0 b) TX bytes:660 (660.0 b)
[root@localhost ~]# route
Kernel IP routing table
Destination
Gateway
Genmask Flags Metric
Ref Use Iface
192.168.103.0
10.0.0.1 255.255.255.0
UG 0
0 0 eth0
10.0.0.0
*
255.0.0.0 U 0
0 0 eth0
-----------tophat:-----------
[root@localhost ~]# ifconfig
eth0
Link encap:Ethernet HWaddr AA:00:00:28:71:5E
inet addr:10.0.0.2 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1273 errors:0 dropped:0 overruns:0 frame:0
TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:163399 (159.5 KiB) TX bytes:1984 (1.9 KiB)
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:20 errors:0 dropped:0 overruns:0 frame:0
TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1644 (1.6 KiB) TX bytes:1644 (1.6 KiB)
[root@localhost ~]# route
Kernel IP routing table
Destination
Gateway
Genmask Flags Metric
Ref Use Iface
192.168.103.0
10.0.0.1 255.255.255.0
UG 0
0 0 eth0
10.0.0.0
*
255.0.0.0 U
0 0 0
eth0
