usb network adapter duplicate MAC address

[s.darmaki]

Hi,

not sure if this is a problem but im trying to install 4 USB network adapters in my CentOS 6.6, the network adapters are detected by the system, but when i see my interface configuration one Adapter shows "eth1" -which i think its normal. but the rest show rename7 and rename8, and they show the same MAC Address as eth1!!!
this is the output for ifconfig -a

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[s.darmaki@Lab-Server ~]$ ifconfig -a
em1       Link encap:Ethernet  HWaddr 18:03:73:BD:77:5B  
          inet addr:192.5.2.163  Bcast:192.5.2.255  Mask:255.255.255.0
          inet6 addr: fe80::1a03:73ff:febd:775b/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:515208 errors:0 dropped:0 overruns:0 frame:0
          TX packets:73610 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:148846577 (141.9 MiB)  TX bytes:9054000 (8.6 MiB)
          Interrupt:20 Memory:e1a00000-e1a20000 

eth1      Link encap:Ethernet  HWaddr 00:E0:4C:53:44:58  
          inet6 addr: fe80::2e0:4cff:fe53:4458/64 Scope:Link
          UP 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:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

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:65536  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3024 (2.9 KiB)  TX bytes:3024 (2.9 KiB)

rename7   Link encap:Ethernet  HWaddr 00:E0:4C:53:44:58  
          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:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

rename8   Link encap:Ethernet  HWaddr 00:E0:4C:53:44:58  
          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:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

this is for lsusb

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[s.darmaki@Lab-Server ~]$ lsusb
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0781:5567 SanDisk Corp. Cruzer Blade
Bus 002 Device 011: ID 0fe6:9700 Kontron (Industrial Computer Source / ICS Advent) DM9601 Fast Ethernet Adapter
Bus 002 Device 012: ID 0fe6:9700 Kontron (Industrial Computer Source / ICS Advent) DM9601 Fast Ethernet Adapter
Bus 002 Device 008: ID 0fe6:9700 Kontron (Industrial Computer Source / ICS Advent) DM9601 Fast Ethernet Adapter
Bus 002 Device 005: ID 0430:100e Sun Microsystems, Inc. 24.1" LCD Monitor v4 / FID-638 Mouse
Bus 002 Device 006: ID 0566:4006 Monterey International Corp. 
Bus 002 Device 007: ID 0430:00a2 Sun Microsystems, Inc. Type 7 Keyboard

is this normal or there is a configuration we need to do first!?

Thanks guys

[TrevorH]

Try those adapters one at a time and use ifconfig to show their MAC addresses. If they are all the same then send them back - they have a hardware error - all MAC addresses are meant to be unique.