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  • Cara Solve Problem Cisco Catalyst 3560-24TS FastEthernet0/x is down, line protocol is down (err-disabled)

    Cara Solve Problem Cisco Catalyst 3560-24TS FastEthernet0/x is down, line protocol is down (err-disabled)



    Salah satu kelebihan feature cisco yaitu Spanning-tree-Protocol (STP), yakni tujuan utamanya adalah untuk menghindari terjadinya Loop yang disebabkan banyaknya switch yang terhubung satu dengan yang lainnya, terlebih pada Topologi Ring. Dengan STP switch mampu untuk melakukan pekerjaannya untuk mendisable port tertentu yang langsung menghubungkan antar switch sehingga untuk jaringan yang redundant yang rawan koneksi antar switch berulang-ulang bisa memblok salah satu link yang berada port switch tersebut.

    pesan error seperti FastEthernet0/x is down, line protocol is down (err-disabled) adalah ketika kita meng-enable spanning-tree BPDU guard pada Switch Catalyst 3560 Series 24 Port yang digunakan yakni :

    Contoh kasus :
    Jika anda hanya memasukkan kabel patch-cord utp ke salah satu switch Cisco tiba-tiba switch terlihat mati secara tiba-tiba. Port tersebut tidak menyala dan tidak berfungsi sama sekali. Tidak terlihat LED kuning terang. Port sama sekali tidak bisa digunakan, rusakkah? ... jangan panik !!!

    Untuk mengetahuinya dapat dengan mudah kita ketahui permasalah terhadap port yang bermasalah tersebut dengan masuk ke console mode atau telnet.


    Ketik perintah tulisan italic.

    Dari console page:
    enable

    Ikuti Perintah berikut:
    show interfaces Fast 0/2

    Akan terlihat tampilan seperti:
    FastEthernet0/2 is down, line protocol is down (err-disabled)
    Hardware is Fast Ethernet, address is 001e.bdab.5f04 (bia 001e.bdab.5f04)
    MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
    reliability 255/255, txload 1/255, rxload 1/255
    Encapsulation ARPA, loopback not set
    Keepalive set (10 sec)
    Full-duplex, 100Mb/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 01:18:08, output 00:00:01, 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 144000 bits/sec, 32 packets/sec
    5 minute output rate 87000 bits/sec, 48 packets/sec
    2288465 packets input, 278939858 bytes, 0 no buffer
    Received 116756 broadcasts (0 multicasts)
    0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
    0 watchdog, 3 multicast, 0 pause input
    0 input packets with dribble condition detected
    4170851 packets output, 421436719 bytes, 0 underruns
    0 output errors, 0 collisions, 3 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
    C3560-24TS#


    Sebagian isi tidak ditampilkan

    Untuk melihat status eror :
    C3560-24TS#show interfaces status err-disabled

    Solusinya adalah cukup dengan menggunakan beberapa perintah:
    config
    interface FastEthernet 0/1
    shutdown
    no shutdown



    Anda akan mendapatkan tampilan:

    C3560-24TS#configure terminal
    C3560-24TS(config)#interface fastEthernet 0/2
    C3560-24TS(config-if)#shutdown
    C3560-24TS(config-if)#no shutdown
    C3560-24TS(config-if)#Crtl-C

    C3560-24TS#show interfaces fastEthernet 0/2
    FastEthernet0/2 is up, line protocol is up (connected)
    Hardware is Fast Ethernet, address is 001e.bdab.5f04 (bia 001e.bdab.5f04)
    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)
    Auto-duplex, Auto-speed, 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 00:43:05, output 00:43:05, 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
    2230371 packets input, 247151675 bytes, 0 no buffer
    Received 116621 broadcasts (0 multicasts)
    0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
    0 watchdog, 3 multicast, 0 pause input
    0 input packets with dribble condition detected
    4083638 packets output, 393211623 bytes, 0 underruns
    0 output errors, 0 collisions, 3 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
    C3560-24TS#configure terminal

    ScreenShot :

    Sebelum


    Setelah



    Jika hal serupa terjadi pada port yang lain, maka kita hanya mengarahkan ke port interface yang bersangkutan.


    Jika info lebih lanjut, silahkan bertanya di komentar.

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