Lost network after lenny-to-squeeze upgrade

[Itay <debian@itayf.fastmail.fm>]

Hi,

I am experiencing major network problems after the upgrade.
Rebooting solves the problem for a short while - after 5
minutes, or so, network will be lost.

Based on searches in the internet I pasted below some info that
I understand might help to resolve the problem.

Please help.
Thanks,
Itay


I seem to have NetworkManager active (I think I blindly opted
for it during the upgrade process - not sure)
<# ps -efl | grep -i network>
5 S root      1832     1  0  80   0 - 19611 -      05:23 ? \
        00:00:00 /usr/sbin/NetworkManager
</# ps -efl | grep -i network>

(
 Do I really need it?  It's home LAN.  Anyway I configured the
 router to assign fixed IP's for our PC's, laptops, etc.
)


<$ cat /etc/network/interfaces>
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
#NetworkManager#iface eth0 inet dhcp
</$ cat /etc/network/interfaces>

(
 Old interfaces file was identical, except that the last line
 wasn't commented-out, i.e.: 'iface eth0 inet dhcp'
 I tried it without much success.
)


<$ dmesg | grep eth0>
[    0.820095] forcedeth 0000:00:0a.0: ifname eth0, \
        PHY OUI 0x732 @ 3, addr 00:26:18:72:71:14
[   30.364009] eth0: no IPv6 routers present
</$ dmesg | grep eth0>


<$ lspci | grep -i eth>
00:0a.0 Ethernet controller: nVidia Corporation \
        MCP79 Ethernet (rev b1)
</$ lspci | grep -i eth>


<# ifconfig -a>
eth0      Link encap:Ethernet  HWaddr 00:26:18:72:71:14
          inet6 addr: fe80::226:18ff:fe72:7114/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4317 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3643 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4309480 (4.1 MiB)  TX bytes:490343 (478.8 KiB)
          Interrupt:20 Base address:0xe000

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:244 errors:0 dropped:0 overruns:0 frame:0
          TX packets:244 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:16212 (15.8 KiB)  TX bytes:16212 (15.8 KiB)

pan0      Link encap:Ethernet  HWaddr e2:cc:28:0e:89:2d
          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:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
</# ifconfig -a>


<$ uname -a>
Linux gandalf 2.6.32-5-amd64 #1 SMP Mon Mar 7 21:35:22 UTC 2011 \
        x86_64 GNU/Linux
</$ uname -a>




--
  Itay Furman          itayf@fastmail.fm
  --------------------------------------
  http://longitude.weizmann.ac.il/~itayf
--