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doctororange
Asked: 2013-01-03 03:47:24 +0800 CST

Network no longer works after replacing components on Ubuntu

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The motherboard of my server (Ubuntu 8.04) died, so I replaced the motherboard, CPU, and RAM. Now I cannot get the server working on the network as it was configured.

The network is configured without DHCP.

The router IP is 10.10.10.1. The server is 10.10.10.10.

Contents of /etc/network/interfaces:

auto eth0
iface eth0 inet static
    address 10.10.10.10
    netmask 255.255.255.0
    gateway 10.10.10.1

Pinging the router (ping 10.10.10.1) results in:

PING 10.10.10.1 (10.10.10.1) 56(84) bytes of data.
From 10.10.10.10 icmp_seq=1 Destination Host Unreachable
From 10.10.10.10 icmp_seq=2 Destination Host Unreachable
...

The result of ifconfig eth0:

eth0     Link encap:Ethernet  HWaddr  90:2b:34:a5:c9:af
         inet addr:10.10.10.10 Bcast: 10.10.10.255  Mask: 255.255.255.0
         inet6 addr: fe80... ( skipped typing this )
         UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
         RX packets:0 errors:0 dropped:0 overrruns: 0 frame:0
         TX packets:446 errors:0 dropped:0 overrruns: 0 carrier:0
         collisions: 0 txqueuelen:1000
         RX bytes:o (0.0 B)  TX bytes:32324 (31.5kb)
         Interrupt:220 Base address:0xa00

The result of route:

Kernel IP routing table
Destination    Gateway         Genmask                Flags   Metric   Ref   Use   iFace
10.10.10.0     *               255.255.255.0          U       0        0       0   eth0
link-local     *               255.255.0.0            U       1000     0       0   eth0
default        10.10.10.1      0.0.0.0                UG      100      0       0   eth0

(Note: The first two results appear immediately. The last line (default route) appears after about 20 seconds. If I do route -n all results show immediately.)

The result of iptables -L shows that there are no iptables entries.

The contents of /etc/hostname:

Server

The contents of /etc/hosts:

127.0.0.1        localhost.localdomain localhost
10.10.10.10      Server.localdomain Server

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

Result of mii-tool:

SIOCGMIIPHY on `eth0` failed: Operation not supported
SIOCGMIIPHY on `eth1` failed: Operation not supported
SIOCGMIIPHY on `eth2` failed: Operation not supported
SIOCGMIIPHY on `eth3` failed: Operation not supported
SIOCGMIIPHY on `eth4` failed: Operation not supported
SIOCGMIIPHY on `eth5` failed: Operation not supported
SIOCGMIIPHY on `eth6` failed: Operation not supported
SIOCGMIIPHY on `eth7` failed: Operation not supported
no MII interfaces found

Result of sudo mii-tool:

SIOCGMIIPHY on `eth0` failed: Operation not supported
no MII interfaces found

Result of arp -a:

? (10.10.10.1) at <incomplete> on eth0

Result of dmesg | grep eth0:

[    22.188268] eth0: RTL8169 at 0xf8888000, 90:2b:34:a5:c9:af, XID 2c900800 IRQ 220
[    41.919804] r8169: eth0: link up

I have disabled IPv6 as described here because dmesg was complaining:

eth0: no IPv6 routers present

I have tried a different network cable and router port. Other computers on the network are functioning fine (they also have static IPs in the 10.10.10.x range).

Initially the network device was named eth2. I deleted /etc/udev/rules.d/70-persistent-net.rules which was successfully regenerated and the new NIC was left with the desired eth0 name. Thanks for the suggestion, Heis Spiter.

Any ideas would be a great help. Thank you!

ubuntu

2 Answers

  1. Is the network card you are using integrated in the motherboard?

    So, has it been replaced?

    If yes, check you udev net rules: /etc/udev/rules.d/70-persistent-net.rules. You might need to update your network cards naming. Removing the old network card and switching the new as eth0. The network cards are identified by their MAC address.

    • 1
  2. Best Answer

    Removing the old r8169 driver and installing the latest r8168 did the trick.

    Cheers.

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