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Cisco 2911 port gone bad?

Hi everyone,

I purchased a brand new Cisco 2911 Router and when connecting everything together I noticed an issue with my gi0/1.

6-17-2013 11-06-30 PM.png

When I issue a no shut on both interfaces the port Gi1/0/12 would intermittently blink amber once and then go off, and it would continue to do so and would never connect the interface.

Cisco 2911

interface GigabitEthernet0/2

no ip address

duplex full

speed 1000

end

GigabitEthernet0/1 is down, line protocol is down

  Hardware is CN Gigabit Ethernet, address is 70ca.9b04.5131 (bia 70ca.9b04.5131)

  Description: CNETWORKS INTERNAL NETWORK

  Internet address is 17.2.34.2/24

  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Auto Duplex, Auto Speed, media type is RJ45

  output flow-control is unsupported, input flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input never, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     0 packets input, 0 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 packets output, 0 bytes, 0 underruns

     0 output errors, 0 collisions, 4 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

Cisco 3750G

interface GigabitEthernet1/0/12

switchport access vlan 801

switchport mode access

speed 1000

duplex full

spanning-tree portfast

end

GigabitEthernet1/0/12 is down, line protocol is down (notconnect)

  Hardware is Gigabit Ethernet, address is 0019.5682.4d0c (bia 0019.5682.4d0c)

  Description: BELL EXTERNAL

  MTU 2000 bytes, BW 10000 Kbit/sec, DLY 1000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input never, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     0 packets input, 0 bytes, 0 no buffer

     Received 0 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     0 packets output, 0 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

I have yet to see any counters increase. I swapped out the cable several times with new Cat6 cables and still no luck. Any insight would be greatly appreciated. Would be unfortunately for this brand new, never opened device would have a dead port.

Thanks!

20 Replies 20

That's wierd.


And the configuration for the interface Gig 0/1 on the router has speed and duplex set to "auto"?

Yessir, that is correct. I found it very strange as well especially seeing the interface flap onto 100/half as i posted in a few posts above.

Ummmmm ... I am not sure what's going on.

I'll wait for others to chime in but I'm suspecting you've got a rare faulty Ethernet port on the router.

No problem Leo,

Thanks so much for your input and your assistance.

It is very much appreciated.

Would like to just bump this thread to see if there are any other options I have in order to test and confirm this being a defective port.

Thanks again.

Gian-Luca Casella wrote:

Would like to just bump this thread to see if there are any other options I have in order to test and confirm this being a defective port.

You have been helped very effectively by Leo, even if no rating was left for his great efforts.

If you still have doubts your next stop should be Cisco TAC.

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