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New Member

line protocol is down


do anybody know decision the next problem:

router#sh int f 0

FastEthernet0 is up, line protocol is down


Description: connected to EthernetLAN


MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 128/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Half-duplex, 10Mb/s, 100BaseTX/FX

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

Last input never, output 00:00:05, output hang never

Last clearing of "show interface" counters never

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

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

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

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

0 watchdog

0 input packets with dribble condition detected

211 packets output, 14090 bytes, 0 underruns

211 output errors, 0 collisions, 3 interface resets

0 babbles, 0 late collision, 0 deferred

211 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

Why is line protocol down?



  • Other Network Infrastructure Subjects
Cisco Employee

Re: line protocol is down

What is it connected to?

New Member

Re: line protocol is down

It is connected to EthernetLAN.There is also 1 another Cisco router,it is working o.k. .

My router isn't configured totally.


New Member

Re: line protocol is down

Well, is there an IP address configured on the interface?

New Member

Re: line protocol is down

Yes, there is one LAN ip address on the interface.