Virtual Box中的桥接适配器 - 无法获取IP

我有安装RHEL的虚拟盒子。我的虚拟盒在Windows 7 64位上运行。我配置了桥接连接，但是当我重新启动网络接口时，我收到以下错误：

Determining IP information for eth1... failed

在Windows XP上它没有问题。我禁用了Windows防火墙并安装了最新的Virtual Box，仍然没有成功。

NAT工作没有任何问题。我错过了什么？

UPDATE

输出ifconfig -a是：

eth0      Link encap:Ethernet  HWaddr 08:00:27:B6:FC:69
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:feb6:fc69/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:430 errors:0 dropped:0 overruns:0 frame:0
          TX packets:346 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:36520 (35.6 KiB)  TX bytes:31455 (30.7 KiB)

eth1      Link encap:Ethernet  HWaddr 08:00:27:C3:84:4A
          inet6 addr: fe80::a00:27ff:fec3:844a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1464 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:135419 (132.2 KiB)  TX bytes:4230 (4.1 KiB)

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: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)

输出 route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.2.0        0.0.0.0         255.255.255.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 eth0
0.0.0.0         10.0.2.2        0.0.0.0         UG    0      0        0 eth0

输出dhclient -v eth1是：

Listening on LPF/eth1/08:00:27:c3:84:4a
Sending on   LPF/eth1/08:00:27:c3:84:4a
Sending on   Socket/fallback
DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 6 (xid=0x6afb6c4c)
DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 9 (xid=0x6afb6c4c)
DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 15 (xid=0x6afb6c4c)
DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 18 (xid=0x6afb6c4c)
DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 13 (xid=0x6afb6c4c)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

此外，具有相同配置的相同机器在Windows XP上运行良好。问题仅出在Windows 7上。

问题不是我的机器，而是我的公司DHCP服务器，它阻止端口上的多个mac。我花了两天时间才发现问题出在我的机器外面