Hi
I'm using grml 0.7 for quite a while. But this morning I woke up to find that I can't access my Internet anymore. Everything was fine last night and I didn't touch anything...
Here are the symptoms:
% /etc/init.d/networking restart Reconfiguring network interfaces...ifup: interface lo already configured done.
Why the message only says interface lo, but not eth0?
$ route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 * 255.255.255.0 U 0 0 0 eth0 default 192.168.2.1 0.0.0.0 UG 0 0 0 eth0
$ ping grml.org ping: unknown host grml.org
Note that the "default" line from route took a long time to show up, so is the "unknown host" line from ping.
% ifconfig eth0 down
$ ifconfig -a eth0 Link encap:Ethernet HWaddr 00:11:2F:BE:4B:BA inet addr:192.168.2.13 Bcast:192.168.2.255 Mask:255.255.255.0 BROADCAST 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:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interrupt:185
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 [...]
Ie, I tried to shut down the eth0, but, should it be gone from "ifconfig -a" output?
I tried to regain dhcp leases but that didn't help.
By then, I ran out of ideas so I rebooted. However, same things happened, and I still can't get onto the Internet.
Note that the Internet is working fine. The other machine that's using the same router worked fine. Also, AOK when I boot back to Debian.
Please help. It's urgent.
thanks
Incoming from T:
I'm using grml 0.7 for quite a while. But this morning I woke up to find that I can't access my Internet anymore. Everything was fine last night and I didn't touch anything...
Here are the symptoms:
% /etc/init.d/networking restart Reconfiguring network interfaces...ifup: interface lo already configured done.
Why the message only says interface lo, but not eth0?
$ route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 * 255.255.255.0 U 0 0 0 eth0 default 192.168.2.1 0.0.0.0 UG 0 0 0 eth0
$ ping grml.org ping: unknown host grml.org
Always ping the IP address when you get "unknown host." The above only tells you DNS isn't working. "ping -c 1 81.223.126.153" goes around DNS.
So, what's in your /etc/resolv.conf?
Note that the "default" line from route took a long time to show up, so is the "unknown host" line from ping.
DNS problem.
% ifconfig eth0 down
$ ifconfig -a eth0 Link encap:Ethernet HWaddr 00:11:2F:BE:4B:BA inet addr:192.168.2.13 Bcast:192.168.2.255 Mask:255.255.255.0 [snip] Ie, I tried to shut down the eth0, but, should it be gone from "ifconfig -a" output?
Yes.
I tried to regain dhcp leases but that didn't help.
"... didn't help" means what? What did dhcp do, what was the result (messages), etc?
By then, I ran out of ideas so I rebooted. However, same things happened, and I still can't get onto the Internet.
Note that the Internet is working fine. The other machine that's using the same router worked fine. Also, AOK when I boot back to Debian.
Good to know; I'd have suggested frobbing (power cycling) the router next. Not necessary.
Please help. It's urgent.
You have two computers, one of which works fine. How can this be "urgent"?
Problem mystically disappeared when I boot again this time. But still some questions remains.
On Sun, 13 Aug 2006 10:57:52 -0600, s. keeling wrote:
% /etc/init.d/networking restart Reconfiguring network interfaces...ifup: interface lo already configured done.
Why the message only says interface lo, but not eth0?
Can anyone explain this?
% ifconfig eth0 down
$ ifconfig -a eth0 Link encap:Ethernet HWaddr 00:11:2F:BE:4B:BA inet addr:192.168.2.13 Bcast:192.168.2.255 Mask:255.255.255.0 [snip] Ie, I tried to shut down the eth0, but, should it be gone from "ifconfig -a" output?
Yes.
What do you mean by yes? should it be gone from "ifconfig -a" output? If so, why it is still there?
Ok, below are answers to your questions, s. keeling:
I tried to regain dhcp leases but that didn't help.
"... didn't help" means what? What did dhcp do, what was the result (messages), etc?
normal. I check the dhcp leases, looks normal too.
By then, I ran out of ideas so I rebooted. However, same things happened, and I still can't get onto the Internet.
Note that the Internet is working fine. The other machine that's using the same router worked fine. Also, AOK when I boot back to Debian.
Good to know; I'd have suggested frobbing (power cycling) the router next. Not necessary.
Please help. It's urgent.
You have two computers, one of which works fine. How can this be "urgent"?
"The other machine" does not necessarily mean a computer, s. keeling. :-)
Incoming from T:
Problem mystically disappeared when I boot again this time. But still some questions remain.
On Sun, 13 Aug 2006 10:57:52 -0600, s. keeling wrote:
Incoming from T:
% ifconfig eth0 down
$ ifconfig -a eth0 Link encap:Ethernet HWaddr 00:11:2F:BE:4B:BA inet addr:192.168.2.13 Bcast:192.168.2.255 Mask:255.255.255.0 [snip] Ie, I tried to shut down the eth0, but, should it be gone from "ifconfig -a" output?
Yes.
What do you mean by yes? should it be gone from "ifconfig -a" output?
If your "ifconfig eth0 down" command worked, yes it should be gone from "ifconfig -a" output. What does /var/log/messages say about it? That should explain what happened when you tried to take down the interface.
If so, why it is still there?
I've no idea, other than "ifconfig eth0 down" failed.
participants (2)
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s. keeling -
T