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cannot get port to come up

Hello -

I am a noob trying to learn some cisco networking stuff. I am working on taking the CCNA test at some point (hopefully soon) but right now I am frustrated.

I have a Catalyst 3550 switch and 2610XM router connected with an ethernet cable. Currently I cannot get the port on the switch to open (lights are dark.) I run 'no shut' on the port (#13) but nothing happens.  If I unplug the cable to the cisco router and plug in a Netgear router (that leads to the internet) into the same port, the port flickers amber for a while, then flickers green from then on.) I switched the cables, both work fine when connected between the switch and the Netgear router.

This was working at one point a couple of days ago. I had the Netgear router plugged into another port on the switch and could ping from the cisco router through the switch to the Netgear router. I thought I had figured things out, but a reboot disavailed me of that notion. (I know, I guess I didn't save my configuration, but I obviously still need to understand more, so its better that I didn't.) (I guess.)

When the problem is occuring, the below is what I am seeing on the two devices.

ROUTER status

====================================

FastEthernet0/0 is up, line protocol is up

  Hardware is AmdFE, address is 0017.9583.b740 (bia 0017.9583.b740)

  Internet address is 192.168.1.90/24

  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 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 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

     21 packets output, 2465 bytes, 0 underruns

     0 output errors, 0 collisions, 2 interface resets

SWITCH status

=================================

FastEthernet0/13 is down, line protocol is down (notconnect)

  Hardware is Fast Ethernet, address is 0011.93c7.498d (bia 0011.93c7.498d)

  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)

  Full-duplex, 100Mb/s, media type is 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 multicast)

     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

======================================

Like I said, going to the switch and typing "no shut" on interface 13 seems too have no effect. What am I missing?

1 Accepted Solution

Accepted Solutions

Richard Burts
Hall of Fame
Hall of Fame

John

I suggest that we start with basics:

- can you verify that the cable connected to switch port Fa0/13 is actually physically connected to router interface Fa0/0?

- assuming that the physical connection in on the correctc ports, can you verify that the cable is a straight through cable (not a cross over or rolled cable)?

HTH

Rick

HTH

Rick

View solution in original post

3 Replies 3

Richard Burts
Hall of Fame
Hall of Fame

John

I suggest that we start with basics:

- can you verify that the cable connected to switch port Fa0/13 is actually physically connected to router interface Fa0/0?

- assuming that the physical connection in on the correctc ports, can you verify that the cable is a straight through cable (not a cross over or rolled cable)?

HTH

Rick

HTH

Rick

Well, starting with the basics was a good idea. It turns out the cable was not being seated completely into the port on the router. I wiggled it, and the port light on the switch came on. I have plugged and unplugged this cable multiple times over the last couple of days.

I knew this was going to turn out to be something stupid like that.

Thanks!

Reza Sharifi
Hall of Fame
Hall of Fame

Hi,

So, you are saying when the switch is connected to the router, the router interface comes up, but the interface on the switch (port 14) doesn't?

Can you post:

"sh run int fa0/13" from the switch?

Also, when you are on the router

can you issue

"sh cdp nei det" and post it here?

HTH

Review Cisco Networking for a $25 gift card