Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

New Member

Port F0/0 protocol down on Router 1841?

Dear All,

I have issue on Cisco Router 1841 on port F0/0 is protocol down

Router#sh ip int br

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            unassigned      YES unset  up                    down   

FastEthernet0/1            unassigned      YES unset  up                    up   

And i try to no shut on port F0/0 but it still donw and  FDX,100 and Link don't have light.

i trty to change cable stragth and cross already but it still down, How can we know this port spoil?

Best Regards,

Rechard

9 REPLIES
VIP Purple

Port F0/0 protocol down on Router 1841?

Hi Rechard,

Check

1) Cabling - use a cable that is known to be working

2) Duplex - either Auto/Auto on both sides or hard coded for speed and duplex

3) IOS - are you using a stable IOS?

4) Change the device it is connected to on the other end to see if there is any change

Specially configure these :

Duplex full
Speed 100

Duplex half
Speed 10

Duplex half
Speed 100

Double full
Speed 10

Try this able Combination and let me know.

Please rate, if it helps.

Regards

New Member

Port F0/0 protocol down on Router 1841?

Dear Sir,

I tasted already but it still problem:

1) Cabling - use a cable that is known to be working

    The cable is working, if i connect this to port 0/1 is working.

2) Duplex - either Auto/Auto on both sides or hard coded for speed and duplex

    i try to change Auto/Auto or halft , speed 100 or speed 10 but it still down.

3) IOS - are you using a stable IOS?

  This IOS that i use :  advipservicesk9-mz.124-9.T3

4) Change the device it is connected to on the other end to see if there is any change

  I connected from My PC to Cisco Router .

Best Regards,

Rehcard

VIP Purple

Port F0/0 protocol down on Router 1841?

can you put your config from the router of the interface fa0/0 and the config from the other side where its is connected???

may be its a problem of trunking protocol.

REgards

New Member

Port F0/0 protocol down on Router 1841?

Dear Sir,

This config that i done :

interface FastEthernet0/0

ip address 192.168.7.4 255.255.255.0

speed 100

full-duplex

!

Router#sh ip int br

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            192.168.7.4     YES manual up                    down   

FastEthernet0/1            unassigned      YES NVRAM  up                    down   

Router#

Now port F0/0 connecting to other devide.

it still down, how can we know this port spoil or problem? i think may be it hardware (port f0/0) but i dont reference for this port spoil or not....

Best Regards,

Rechard

VIP Purple

Port F0/0 protocol down on Router 1841?

can you give me the out put of this coomand on router: sh interface fa0/0

and other output from the other device where this interface connected:sh int _

Regards

New Member

Port F0/0 protocol down on Router 1841?

Dear Sir,

Router#sh int f0/0

FastEthernet0/0 is up, line protocol is down

  Hardware is Gt96k FE, address is 64a0.e7e3.a38e (bia 64a0.e7e3.a38e)

  Internet address is 192.168.7.4/24

  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, 100BaseTX/FX

  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

     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

     127 packets output, 8547 bytes, 0 underruns

     0 output errors, 0 collisions, 2 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

VIP Purple

Port F0/0 protocol down on Router 1841?

where this port connected -....to .....-------------------------> pc

                                                    ..........................> switch ?

Regards

New Member

Port F0/0 protocol down on Router 1841?

Dear Sir,

I test only one port, i mean port f0/0 connect to PC, and also i connect port f0/0 to switch ( normal switch and not cisco)

and it still not work.

Best Regards,

Rechard

VIP Purple

Port F0/0 protocol down on Router 1841?

Hi ,

Just try

1. use  new crossover cable to connect to pc or switch.

2. if you are conneting with switch then please check the port setting on switch: should be Full-duplex, 100Mb/s.

3. if you are connecting with a pc then please go and check the NIC setting:

NIC SETTING. my computer properties>hardware>device manager>network adaptor properties>link speed duplex mode should be full and speed 100Mbs.

Regards

rate it if it helps.

8059
Views
0
Helpful
9
Replies
CreatePlease to create content