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Gigabit on 3560 switch line protocol is down (disabled)

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gzuszgr8

gzuszgr8

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Apr 18, 2001
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I have been having an issue where I have a SPF cable from switch to switch that shows port administratively shutdown here is a show interface:

GigabitEthernet0/3 is administratively down, line protocol is down (disabled)
Hardware is Gigabit Ethernet, address is 001b.0c0d.e71b (bia 001b.0c0d.e71b)
Description: Dot1Q Link to Data2Floor2
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Auto-duplex, Auto-speed, link type is auto, media type is 1000BaseCX SFP Cable
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, 18 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

I have tried many things to change this. any help would be great. I tested the cable on a different set of switches and the link came right up.
 
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did you go under the interface and issue no shutdown?

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)
 
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No there is no port security and yes I tried to issue no shutdown many times.
 
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what kind of switch/line card is it??

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)
 
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does it let you issue the 'no shut' command? are you doing it in config t mode? (sorry)
 
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On the interface see if there is a "media" command sometimes you have to select the media type of the port whether fiber or copper .
 
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What model 3560 is this ? What does a show interface status show ?
 
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Corp-1stFloor1#show interface gi0/3 status

Port Name Status Vlan Duplex Speed Type
Gi0/3 Dot1Q Link to Data disabled 1 auto auto 1000BaseCX SF
P Cable

Here is the other port:
Corp-1stFloor2#show inter gi0/1
GigabitEthernet0/1 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 001b.0c27.a581 (bia 001b.0c27.a581)
Description: D0t1q to 1st floor 1st switch
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Auto-duplex, Auto-speed, link type is auto, media type is 1000BaseCX SFP Cable
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
 
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Try changing it to one of the other sfp ports and see what happens .
 
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on Corp-1stFloor1 - do a "show run int gig0/3"

on Corp-1stFloor2 - do a "show run int gig0/1"

post those results

not the "sho int" - but the "show run int" for those interfaces

--DW
 
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Corp-1stFloor1#show run int gi0/3
Building configuration...

Current configuration : 294 bytes
!
interface GigabitEthernet0/3
description Dot1Q Link to Data2Floor2
switchport trunk encapsulation dot1q
switchport mode trunk
keepalive 10
shutdown
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
queue-set 2
mls qos trust cos
auto qos voip trust
end



Corp-1stFloor2#show run int gi0/1
Building configuration...

Current configuration : 274 bytes
!
interface GigabitEthernet0/1
description D0t1q to 1st floor 1st switch
switchport trunk encapsulation dot1q
switchport mode trunk
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
queue-set 2
mls qos trust cos
auto qos voip trust
end
 
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administratively down" means a port is shut down

look at Corp-1stFloor1

Port gig0/3 is in "shutdown" state

Go to that switch. Config t. Int gig0/3. no shut.

--DW
 
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I have done no shutdown commands many times it doesnt do it.
 
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sounds like it's time to open a Cisco TAC case and you have a possible IOS bug.

administratively down, by definition, means that your port is in the "shutdown" state in your configuration

Post the ENTIRE output from this

Logon to Corp-1stFloor1

sho int gig0/3

sho run int gig0/3

config t

int gig0/3

no shut

(press CTRL-Z)

sho run int gig0/3

sho int gig0/3

that will show us the port state of gig0/3

then the configuration

then we'll watch you enter config mode, then interface config mode, then enter the "sno shut" command

then we'll see the configuration again (which should NOT contain the "shutdown" remark)

then we'll see the port state

if entering the "no shut" command, specifically on gig0/3 on Corp-1stFloor1 does NOT take that port out of "administratively down" mode - then you have a bug.

--DW
 
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Change logging to debug level then issue your "no shut" command again. Go to the log (or log to console) and see what it says the interface has done.
 
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try to default the interface
see if will stay no shut if it does then put your configuration back on and see what happens..

config t
default interface gig0/3
end
sh int
config t
int g0/3
no shutdown
end
show run int g0/3
!
show int g0/3
 
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.May 21 12:07:05.568: Gi0/3 can't be brought up because it failed POST in loopback test

Can I fix this?
 
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