Which configuration change(s) is/are needed bring FastEthernet 0/2 up/up ?
  • This show output is from the S7 Cisco Metro Switch and the PE7 Cisco ASR 9000 Series Router. Which configuration change(s) is/are needed to bring the S7 FastEthernet 0/2 interface into the up/up state?
    S7#show cdp neighbors
    <OUTPUT OMITTED>

    Device ID        Local Intrfce    Holdtme    Capability  Platform  Port ID
    PE7              Fas 0/2            163            R    ASR9K Ser Gig 0/0/0/0
    S78              Fas 0/23          146          S I    ME-3400E- Fas 0/21
    S8                Fas 0/21          178          S I    ME-3400E- Fas 0/21

    *Mar 20 21:28:02.177: %ETHCNTR-3-HALF_DUX_COLLISION_EXCEED_THRESHOLD:
    Collisions at FastEthernet0/2 exceed threshold. Considered as loop-back.

    *Mar 20 21:28:02.177: %PM-4-ERR_DISABLE: loopback error detected on Fa0/2, putting Fa0/2 in
    err-disable state

    *Mar 20 21:28:03.184: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed
    state to down

    S7#show interface fa0/2
    FastEthernet0/2 is down, line protocol is down (err-disabled)
    Hardware is Fast Ethernet, address is e8ba.70b5.6c04 (bia e8ba.70b5.6c04)
    MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255
    Encapsulation ARPA, loopback not set, Keepalive set (10 sec)
    Half-duplex, 10Mb/s, media type is 10/100BaseTX
    input flow-control is off, output flow-control is unsupported
    ARP type: ARPA, ARP Timeout 04:00:00
    Last input 00:00:40, output 00:00:00, 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
      484423 packets input, 39349929 bytes, 0 no buffer
      Received 484423 broadcasts (167203 multicasts)
      0 runts, 0 giants, 0 throttles
      1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
      0 watchdog, 167203 multicast, 0 pause input
      0 input packets with dribble condition detected
      972398 packets output, 128931949 bytes, 0 underruns
      0 output errors, 46 collisions, 4 interface resets
      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

    RP/0/RSP0/CPU0:PE7#show interfaces gi0/0/0/0
    GigabitEthernet0/0/0/0 is down, line protocol is down
    Interface state transitions: 4
    Hardware is GigabitEthernet, address is 4055.392f.40a8 (bia 4055.392f.40a8)
    Internet address is 192.168.107.70/24
    MTU 1514 bytes, BW 100000 Kbit (Max: 100000 Kbit)
      reliability 255/255, txload 0/255, rxload 0/255
    Encapsulation ARPA,
    Full-duplex, 100Mb/s, THD, link type is force-up
    output flow control is off, input flow control is off
    loopback not set,
    ARP type ARPA, ARP timeout 04:00:00
    Last input 00:00:00, output 00:00:35
    Last clearing of "show interface" counters never
    5 minute input rate 0 bits/sec, 0 packets/sec
    5 minute output rate 0 bits/sec, 0 packets/sec
      972551 packets input, 128953765 bytes, 729 total input drops
      172486 drops for unrecognized upper-level protocol
      Received 0 broadcast packets, 800781 multicast packets
      0 runts, 0 giants, 0 throttles, 0 parity
      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
      484545 packets output, 39360900 bytes, 0 total output drops
      Output 317283 broadcast packets, 167262 multicast packets
      0 output errors, 0 underruns, 0 applique, 0 resets
      0 output buffer failures, 0 output buffers swapped out
      4 carrier transitions

    A. Just need to shut and no shut the Fa0/2 interface on S7.
    B. Enable loopback line on the S7 Fa0/2 interface then shut and no shut the Fa0/2 interface.
    C. Change S7 Fa0/2 interface to duplex full and speed 100 then shut and no shut the Fa0/2 interface.
    D. Enable duplex half on the PE7 Gi0/0/0/0 interface then shut and no shut the Fa0/2 interface on S7.
    E. Just need to no shut the Fa0/2 interface on S7. 8)