Re: DNS or network problem

Bruce Hyatt wrote:
Below is the output from the machine that works:

ifconfig:
eth0 Link encap:Ethernet HWaddr 00:40:33:AA:94:56
inet addr:192.168.1.199 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::240:33ff:feaa:9456/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10263 errors:0 dropped:0 overruns:0 frame:0
TX packets:129 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3210318 (3.0 Mb) TX bytes:10568 (10.3 Kb)
Interrupt:10 Base address:0xec00

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:171 errors:0 dropped:0 overruns:0 frame:0
TX packets:171 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11228 (10.9 Kb) TX bytes:11228 (10.9 Kb)

route:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0

Here's the ouput from the machine that's not working:

ifconfig:
eth0 Link encap:Ethernet HWaddr 00:03:47:DE:F2:B5
inet addr:192.168.1.198 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::203:47ff:fede:f2b5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:75 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:24217 (23.6 Kb) TX bytes:546 (546.0 b)

eth1 Link encap:Ethernet HWaddr 00:03:47:DE:EF:D3
inet addr:192.168.1.198 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::203:47ff:fede:efd3/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:9 errors:9 dropped:0 overruns:0 carrier:9
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:546 (546.0 b)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)

route:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth1

The first thing that leaps out at me is the fact that eth0 and eth1
on the machine with problems have the same IP address, and are on
the same network. The second is that eth1 is not getting any trafic
on it. Because all your routes passes through eth1, and not eth0, I
can see why you are not able to talk to any machines. All outgoing
traffic tries to use an interface that is not connected to the
network you are trying to talk to. (All outgoing packets dropped,
and not incoming packets on eth1 as compared to 75 packets recieved,
and 9 sent on eth0, with none dropped.)

Probably the quickest fix is to disable eth1, or at least
re-configure it, and drop the default route. For a quick test, try
running, as root:

ifdown eth1
ifdown eth0
ifup eth0

This should reset everything to use eth0, at least until you reboot.
If eth0 and eth1 are both Ethernet cards, you could move the cable
to the other interface and also have things working.

Now, if you want the machine to bridge or route between eth0 and
eth1, then things need to be set up different. If you want this box
to be a firewall between two networks, then you will need to put
eth0 and eth1 on different networks.

Mikkel
--

Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

--
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list

Relevant Pages