Hi
I did not upgraded, but one day DHCP server of our institute was shutdown. After that my linux system stopped getting ip-address.
Following are the details as you asked in the last mail, one thing to note here is my system will have different ip when it is connected to wired(192.168.1.220 because of our institute policy).
When my sysstem is connected to wireless netwrok:
(ip: 192.168.1.219, netmaak:255.255.255.0, gateway:192.168.1.1, DNS server: 192.168.1.7)
ifconfig
eth0 Link encap:Ethernet HWaddr 00:24:81:65:bf:68
UP 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:17
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:260 errors:0 dropped:0 overruns:0 frame:0
TX packets:260 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:22536 (22.5 KB) TX bytes:22536 (22.5 KB)
wlan0 Link encap:Ethernet HWaddr 00:22:fa:4c:8e:f6
inet addr:192.168.1.219 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::222:faff:fe4c:8ef6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:169 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:13154 (13.1 KB)
route -n
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 2 0 0 wlan0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0
When my system is connected to wired netwrok:
ifconfig
eth0 Link encap:Ethernet HWaddr 00:24:81:65:bf:68
inet addr:192.168.1.220 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::224:81ff:fe65:bf68/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4775 errors:0 dropped:0 overruns:0 frame:0
TX packets:2675 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1777691 (1.7 MB) TX bytes:607286 (607.2 KB)
Interrupt:17
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:16 errors:0 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1008 (1.0 KB) TX bytes:1008 (1.0 KB)
wlan0 Link encap:Ethernet HWaddr 00:22:fa:4c:8e:f6
UP 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)
iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
pan0 no wireless extensions.
wlan0 IEEE 802.11abgn ESSID
ff/any
Mode:Managed Access Point: Not-Associated Tx-Power=15 dBm
Retry long limit:7 RTS thr
ff Fragment thr
ff
Power Management
ff
route -n
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 1 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0