eth0 not working properly !?

Kim Neunert k9ert at
Wed Nov 16 02:26:48 PST 2005


I recently finished with LFS book and now I try to get my 
Internet-connection working. First, I wondered that "ifconfig" is not 
installed. It seems, that "link" is another frontend to the "ip 
interfaces" ?! I installed ifconfig as described in BLFS.

But I should proceed to my problem: pinging is not possible. Everything 
is fine but no ping-answer:
PING ( 56 data bytes
64 bytes from quorty-lfs ( Destination Host Unreachable
Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst Data
 4  5  c0 7000 3074   0 0000  40  01 4282

So, what's wrong? Here is ifconfig's output:

eth0      Link encap:Ethernet  HWaddr 00:50:BA:D5:73:E9
          inet addr:  Bcast:  Mask:
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 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:0 (0.0 b)  TX bytes:540 (540.0 b)
          Interrupt:18 Base address:0xa000

lo        Link encap:Local Loopback
          inet addr:  Mask:
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:11 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:984 (984.0 b)  TX bytes:984 (984.0 b)

Here is "route -n"

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface   U     0      0        0 
eth0         UG    0      0        0 

So, I installed tcpdump. Here is tcpdump's output:

10:42:36.671360 arp who-has tell quorty-lfs

Maybe, the address is not existing? But I'm sure, it exists (it's my 
internet-gw). From my good working debian system on the same computer, 
ping looks like that:
kim at quorty:~$ ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=64 time=1.31 ms
64 bytes from icmp_seq=2 ttl=64 time=0.743 ms

--- ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.743/1.031/1.319/0.288 ms
kim at quorty:~$

Another strange thing is, that the light on the switch is not blinking, 
while pinging.

Any hints how I could track down the error?



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