Wired Connection not always working on 12.04 x64

Question

I recently started having troubles with my Ubuntu 12.04 machine's wired connection. It will go for periods where it is working completely fine then it will stop working while other machines connected to the network still have a connection.

I have tried uninstalling Realtek r8169 and installed r8168-8.032, but I am still noticing this problem. The output of ifconfig:

eth0  Link encap:Ethernet  HWaddr 1c:6f:65:ce:52:f6  
      inet addr:10.0.0.6  Bcast:10.0.0.255  Mask:255.255.255.0
      inet6 addr: fe80::1e6f:65ff:fece:52f6/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:18375 errors:0 dropped:0 overruns:0 frame:0
      TX packets:16973 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:15419567 (15.4 MB)  TX bytes:2855405 (2.8 MB)
      Interrupt:46 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:5485 errors:0 dropped:0 overruns:0 frame:0
      TX packets:5485 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:460194 (460.1 KB)  TX bytes:460194 (460.1 KB)

Output of lspci:

00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 82801 PCI Bridge (rev b5)
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5)
00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5)
00:1c.6 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 7 (rev b5)
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation Z68 Express Chipset Family LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
01:00.0 VGA compatible controller: NVIDIA Corporation GF100 [GeForce GTX 470] (rev a3)
01:00.1 Audio device: NVIDIA Corporation GF100 High Definition Audio Controller (rev a1)
02:00.0 IDE interface: Marvell Technology Group Ltd. Device 917a (rev 11)
03:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 10)
04:02.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev c0)
05:00.0 USB controller: Etron Technology, Inc. EJ168 USB 3.0 Host Controller (rev 01)
06:00.0 USB controller: Etron Technology, Inc. EJ168 USB 3.0 Host Controller (rev 01)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
08:00.0 IDE interface: Marvell Technology Group Ltd. Device 917a (rev 11)

output of vi /etc/network/interfaces:

auto lo
2 iface lo inet loopback

I downloaded Wicd and replaced my network manager with it. Each time I log on I have issues with the Internet, but after disconnecting and reconnecting it works without any problems.