Fastethernet Interface is down down ?

amb1s1

This is the config:
interface FastEthernet0/31
description ISP
switchport access vlan 25
switchport mode access

amb1s1

I dis a no shut on the interface and still down.

remyforbes777

if you have a status of down down that means that there is probably some physical issue. Showing us your config is not going to help. Thats not a full config anyhow. Show us sh inter fas 0/31

amb1s1

FastEthernet0/31 is down, line protocol is down (notconnect)
Hardware is Fast Ethernet, address is 001f.c983.ac23 (bia 001f.c983.ac23)
Description: ISP
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 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 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out

shednik

Like remy said there is definitely a physical layer issue check the cabling try bringing the interface down and back up. Maybe try another cable?

tech-airman

amb1s1 wrote:

This is the config:
interface FastEthernet0/31
description ISP
switchport access vlan 25
switchport mode access

amb1s1,

Questions:

1. Do you have at least a Category 5 UTP cable connected to the FastEthernet 0/31 port of the switch?
   [list=1:5aeda29c6f]
2. If yes, is the other end of the Category 5 UTP cable connected to a FastEthernet NIC of a host that is powered on?

[/list:o:5aeda29c6f]

amb1s1

It is a bad port because when I plug the cable on another swithc with the same config, the interface is showing up/up.

tech-airman

amb1s1 wrote:

It is a bad port because when I plug the cable on another swithc with the same config, the interface is showing up/up.

amb1s1,

Since you configured that switch port as a vlan access port, that port should be connected to a host and not another switch.

amb1s1

I have a host connect to that port, not a switch.

mikej412

What do you get as the output from a show interface FastEthernet0/31 switchport command?

amb1s1

mikej412 wrote:

What do you get as the output from a show interface FastEthernet0/31 switchport command?

FastEthernet0/31 is down, line protocol is down (notconnect)
Hardware is Fast Ethernet, address is 001f.c983.ac23 (bia 001f.c983.ac23)
Description: ISP
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 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 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out

tech-airman

amb1s1 wrote:

mikej412 wrote:

What do you get as the output from a show interface FastEthernet0/31 switchport command?

FastEthernet0/31 is down, line protocol is down (notconnect)
Hardware is Fast Ethernet, address is 001f.c983.ac23 (bia 001f.c983.ac23)
Description: ISP
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 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 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out

If you state that you've got a host connected to fastethernet port 0/31, then why does it say "line protocol is down (notconnected)?"

amb1s1

The switch was replaced and now is up/up, so the problem was a bad port.