ubuntu eth0 not reconnecting after cable unplugged
- by Alex
I'm running kubuntu 9.10 w/ gnome, I have a static IP defined in /etc/network/interfaces
When I unplugged my network cable and rebooted, then reconnected the network cable I was not able to connect. I tried using sudo ifup eth0, and then ifconfig and it seemed as though the IP address had been assigned and I was connected, but I wasn't. I then did ifdown eth0, and again ifup eth0. For some reason I'm not able to access the network. Furthermore, I also attempted to connect via wlan, and was able to connect to the wireless network, but cannot "see" the network. I can't transfer data or access the internet or anything on the network including the router.
How do I resolve this?
topsy@monolyth:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1c:25:1c:df:70
inet addr:192.168.1.145 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21c:25ff:fe1c:df70/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5720 errors:0 dropped:0 overruns:0 frame:0
TX packets:565 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:378035 (378.0 KB) TX bytes:46832 (46.8 KB)
Memory:fe000000-fe020000
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:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:240 (240.0 B) TX bytes:240 (240.0 B)
By access the network I mean the local network as well as the internet.
topsy@monolyth:~$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=9.14 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=1.24 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.01 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=1.00 ms
[snip... all OK, icmp_seq from 5-30, time between 0.981-1.25ms]
^C
--- 192.168.1.1 ping statistics ---
30 packets transmitted, 30 received, 0% packet loss, time 29035ms
rtt min/avg/max/mdev = 0.971/1.300/9.140/1.458 ms
topsy@monolyth:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 1000 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
root@monolyth:~# cat /etc/resolv.conf
# Generated by NetworkManager
