Ethernet0 is up, line protocol is down

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May 4th, 2007
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Exactly that.


show in e 0

Ethernet0 is up, line protocol is down

Hardware is Lance, address is 00e0.b02d.4258 (bia 00e0.b02d.4258)

Internet address is 192.168.0.17/29

MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,

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

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

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

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 runts, 0 giants, 0 throttles

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

0 input packets with dribble condition detected

522 packets output, 32115 bytes, 0 underruns

522 output errors, 0 collisions, 8 interface resets

0 babbles, 0 late collision, 0 deferred

522 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out


Cable is good. I am lost help is appreciated.


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Overall Rating: 5 (2 ratings)
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sundar.palaniappan Fri, 05/04/2007 - 13:33
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Is this a switch or a router. What's on the other end of the connection. How did you verify the cable is good. Are you using the right type of cable, crossover/straighthrough etc?


HTH


Sundar

bruce.cowan Fri, 05/04/2007 - 13:39
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This is a router and I am using a good crossover. Tested by use with another device.

sundar.palaniappan Fri, 05/04/2007 - 13:44
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Is it connected to a switch or a router. If it's a switch then you need to use a straight-through cable.



vgrigaliunas Fri, 05/04/2007 - 13:58
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I assume the router interface is enabled (sorry ;-))? Can you do a hard loopback on both interfaces ?

bruce.cowan Fri, 05/04/2007 - 14:13
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I forgot to state that it is connecting to a pc. I issued the no shutdown command once the ip and subnet were assigned. I will do the lb and post results


bruce.cowan Fri, 05/04/2007 - 14:24
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I entered the command loopback and now

Ethernet0 is up, line protocol is down

Hardware is Lance, address is 00e0.b02d.4258 (bia 00e0.b02d.4258)

Internet address is 192.168.0.17/29

MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,

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

Encapsulation ARPA, loopback set

Keepalive set (10 sec)

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

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 runts, 0 giants, 0 throttles

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

0 input packets with dribble condition detected

982 packets output, 59715 bytes, 0 underruns

982 output errors, 0 collisions, 11 interface resets

0 babbles, 0 late collision, 0 deferred

982 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out


still down. If that was not what u meant by hard lb please let me know.

jasonrandolph Fri, 05/04/2007 - 15:05
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Try hard-seting the speed/duplex on the PC's NIC to 10/half... Many newer NICs will not come up if duplex between the network device and PC do not match.


10/100 Ethernet has no provisions in it for duplex negotiation.

vgrigaliunas Mon, 05/07/2007 - 10:01
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I assume this is UTP ? We have UTP loopback plugs which loop the proper wires back onto themselves to make a "hard" loopback to see if the interfaces are OK. You can probably make one yourself provided you have the UTP pinouts...does the PC interface come up on a different port of the router did you say ?

scottmac Fri, 05/04/2007 - 16:13
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There are two things that (normally) can cause this:


1) Try a new cable, in your case, probably a cross-over cable


2) An invalid ENCAPS type for Ethernet


Good Luck


Scott


Richard Burts Mon, 05/07/2007 - 18:28
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Bruce


Based on this in the output that you posted:

Hardware is Lance

I believe that this interface is 10 Mb half duplex. My guess is that the PC is not matching, probably because the PC is attempting to negotiate speed and duplex but the router interface does not negotiate. Try setting the PC to 10 half duplex and let us know what happens.


HTH


Rick

bruce.cowan Tue, 05/08/2007 - 05:43
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I appreciate the help. I will be checking the pc nic this after noon and all the other suggestions. I do appreciate all the help.


Bruce

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