Pretty new to linux and recently built a file server utilizing an old PC. I installed a new 1 GB NIC following the vendors instruction without issue and I am able to get an IP and ping the interface when ETH0 is also plugged in. But when I try to pull the cable for ETH0 (old onboard card) I lose ETH1 (new 1 GB card) as well. Any ideas to what is going on?
NIC hardware:
ETH1 00:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10)
ETH0 00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
Here is the ifconfig.
eth0 Link encap:Ethernet HWaddr 00:50:2C:05

1:6B
inet addr:192.168.1.201 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::250:2cff:fe05:d16b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:340014174 errors:0 dropped:0 overruns:0 frame:0
TX packets:258254949 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1652336234 (1575.7 Mb) TX bytes:707605757 (674.8 Mb)
Interrupt:18 Base address:0xd800
eth1 Link encap:Ethernet HWaddr 00:0A:CD:1C:19:32
inet addr:192.168.1.71 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20a:cdff:fe1c:1932/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5166 errors:0 dropped:0 overruns:0 frame:0
TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:403611 (394.1 Kb) TX bytes:8242 (8.0 Kb)
Interrupt:19 Base address:0x6000