解决办法一：
[root@rac1 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:0C:8A:B4
。。。。。。。。。。。。。。。
inet6 addr: fe80::20c:29ff:fe0c:8ab4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:182 errors:0 dropped:0 overruns:0 frame:0
TX packets:40 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:12402 (12.1 KiB) TX bytes:2935 (2.8 KiB)
Interrupt:185 Base address:0x1480
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:3960 errors:0 dropped:0 overruns:0 frame:0
TX packets:3960 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5208396 (4.9 MiB) TX bytes:5208396 (4.9 MiB)
[root@rac1 ~]# cd /etc/sysconfig/network-scripts/
[root@rac1 network-scripts]# ls
ifcfg-eth0 ifdown-isdn ifup-ib ifup-plusb init.ipv6-global
ifcfg-lo ifdown-post ifup-ippp ifup-post network-functions
ifdown ifdown-ppp ifup-ipsec ifup-ppp network-functions-ipv6
ifdown-aliases ifdown-sit ifup-ipv6 ifup-routes
ifdown-ippp ifdown-sl ifup-ipx ifup-sit
ifdown-ipsec ifup ifup-isdn ifup-sl
ifdown-ipv6 ifup-aliases ifup-plip ifup-wireless
[root@rac1 network-scripts]# cp ifcfg-eth0 ifcfg-eth1
[root@rac1 network-scripts]# vi ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
HWADDR=00:0c:29:0c:8a:be
ONBOOT=yes
TYPE=Ethernet
NETMASK=255.255.255.0
IPADDR=192.168.2.101
USERCTL=no
IPV6INIT=no
PEERDNS=yes
GATEWAY=192.168.2.1
~
~
~
~
~
~
~
~
~
~
~
~
"ifcfg-eth1" 11L, 175C written
[root@rac1 network-scripts]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:0C:8A:B4
。。。。。。。。。。。。。。。。。。。。
inet6 addr: fe80::20c:29ff:fe0c:8ab4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1185 errors:0 dropped:0 overruns:0 frame:0
TX packets:312 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:81252 (79.3 KiB) TX bytes:28105 (27.4 KiB)
Interrupt:185 Base address:0x1480
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:7057 errors:0 dropped:0 overruns:0 frame:0
TX packets:7057 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9647576 (9.2 MiB) TX bytes:9647576 (9.2 MiB)
[root@rac1 network-scripts]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down loopback interface: [ OK ]
Setting network parameters: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0:
[ OK ]
Bringing up interface eth1:
通过上面的办法，eth1添加上了，但有了新的问题，eht0ping不通了。
方法二：
通过system-config-network命令，然后在图形界面新建网卡的方法：
同样能够添加到网卡，也能成功启动，但是在eth1启动后，eth0将无法访问。
最后用在和eth0同一网段的机器访问该虚拟机，发现访问正常，至此，可以判断上述两种添加方法都可用，造成无法访问的原因是某些网络方面的限制。