My Access switches trunk ports goes to Err-Disabled periodically.

[nomansafdar]

I have a network with 2 core switches and 15 access switches. 

Now the problem is my access switches trunk ports go to err-disabled mode once a week or once in two weeks. Please, someone, suggest what could be the reason.

[balaji.bandi]

what is the config on the port-channel config (post information here)

what device and what IOS code running ?

is this SFP or Ethernet connection between switches ?

here is troubleshooting tips :

https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/69980-errdisable-recovery.html

Note : I have encounter sometime back due to strom config on port-channel.

[nomansafdar]

Thanks for the reply @balaji.bandi 
As i mentioned above i have 15 access switches and 9 of them went to err-disabled mean their trunk ports went to err-disabled and my switches have a different model. Pasting the config from one of them.

interface GigabitEthernet0/47
switchport trunk encapsulation dot1q
switchport mode trunk

Cisco IOS Software, C3560 Software (C3560-IPBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)

[MichaelMcCoy]

Have you verified the information on both ends of the trunk.  You did show us one side of the link and the configuration, have you double checked the other side is the exact same?

[balaji.bandi]

how are these connected, do you have any network diagram, what is the Log show, Looks for me some spanning issue ? but this required more information.

1. Look all the device gone error disable logs

2. how are they connected ?

3. is there any loop in the network ?

[MHM Cisco World]

Dual core sw, there is chance some stp guard do err disable the port or port secuirty  enable in trunk and max mac reach the limit.

show spanning-tree summary give you what STP guard enable in SW.

[nomansafdar]

yes, both side configurations are the same. Or do you want to post the interface complete info?
interface GigabitEthernet0/9
switchport trunk encapsulation dot1q
switchport mode trunk

[MHM Cisco World]

there are some STP guard enable in global mode not interface mode, so it not appear under interface but do 
show stp summary give you view what is running

[nomansafdar]

where do you want me to run show spanning-tree on core switch or access switch?

[nomansafdar]

here is the summary of stp

Core-Switch-B#sh spanning-tree summary
Switch is in rapid-pvst mode
Root bridge for: VLAN0001, VLAN0010, VLAN0016, VLAN0020, VLAN0030, VLAN0040
VLAN0050, VLAN0060, VLAN0070-VLAN0072, VLAN0080, VLAN0090, VLAN1060
EtherChannel misconfig guard is enabled
Extended system ID is enabled
Portfast Default is disabled
PortFast BPDU Guard Default is disabled
Portfast BPDU Filter Default is disabled
Loopguard Default is disabled
UplinkFast is disabled
BackboneFast is disabled
Configured Pathcost method used is short

Name Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
VLAN0001 0 0 0 12 12
VLAN0010 0 0 0 15 15
VLAN0015 0 0 0 12 12
VLAN0016 0 0 0 12 12
VLAN0020 0 0 0 16 16
VLAN0030 0 0 0 12 12
VLAN0040 0 0 0 12 12
VLAN0050 0 0 0 13 13
VLAN0060 0 0 0 12 12
VLAN0070 0 0 0 12 12
VLAN0071 0 0 0 12 12
VLAN0072 0 0 0 12 12
VLAN0080 0 0 0 12 12
VLAN0090 0 0 0 12 12
VLAN1060 0 0 0 12 12
---------------------- -------- --------- -------- ---------- ----------
15 vlans 0 0 0 188 188

[MHM Cisco World]

please share 
show vlan

[Leo Laohoo]

Trunks go into error-disable? 
Post the complete output to the command "sh interface <TRUNK PORT> controll".  I want to see the output from both sides. 

NOTE:  Do not post screenshots.

[nomansafdar]

Description: CON WITH CORE SW-1
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, 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 19000 bits/sec, 31 packets/sec
5 minute output rate 2000 bits/sec, 1 packets/sec
8731311 packets input, 1629509384 bytes, 0 no buffer
Received 1083201 broadcasts (1681978 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1681978 multicast, 0 pause input
0 input packets with dribble condition detected
5780067 packets output, 1048103285 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

Transmit GigabitEthernet0/48 Receive
1048104921 Bytes 1629510780 Bytes
5761790 Unicast frames 5966133 Unicast frames
13026 Multicast frames 1681988 Multicast frames
5255 Broadcast frames 1083205 Broadcast frames
0 Too old frames 1311789006 Unicast bytes
0 Deferred frames 203758779 Multicast bytes
0 MTU exceeded frames 79351403 Broadcast bytes
0 1 collision frames 0 Alignment errors
0 2 collision frames 0 FCS errors
0 3 collision frames 0 Oversize frames
0 4 collision frames 0 Undersize frames
0 5 collision frames 0 Collision fragments
0 6 collision frames
0 7 collision frames 1725841 Minimum size frames
0 8 collision frames 3395166 65 to 127 byte frames
0 9 collision frames 3131875 128 to 255 byte frames
0 10 collision frames 72082 256 to 511 byte frames
0 11 collision frames 160268 512 to 1023 byte frames
0 12 collision frames 246094 1024 to 1518 byte frames
0 13 collision frames 0 Overrun frames
0 14 collision frames 0 Pause frames
0 15 collision frames
0 Excessive collisions 0 Symbol error frames
0 Late collisions 0 Invalid frames, too large
0 VLAN discard frames 0 Valid frames, too large
0 Excess defer frames 0 Invalid frames, too small
334177 64 byte frames 0 Valid frames, too small
2657409 127 byte frames
2588242 255 byte frames 0 Too old frames
11553 511 byte frames 0 Valid oversize frames
53070 1023 byte frames 0 System FCS error frames
135620 1518 byte frames 0 RxPortFifoFull drop frame
0 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames

Description: F1-H2-SW1
MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:06, output 00:00:00, 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 18000 bits/sec, 29 packets/sec
322237601 packets input, 73590801628 bytes, 0 no buffer
Received 1081798 broadcasts (612313 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 612313 multicast, 0 pause input
0 input packets with dribble condition detected
418379396 packets output, 89689929692 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

Transmit GigabitEthernet0/45 Receive
3790584640 Bytes 576357596 Bytes
324288069 Unicast frames 321155803 Unicast frames
61922467 Multicast frames 612313 Multicast frames
32168872 Broadcast frames 469485 Broadcast frames
0 Too old frames 3432113449 Unicast bytes
0 Deferred frames 111803063 Multicast bytes
0 MTU exceeded frames 39993128 Broadcast bytes
0 1 collision frames 0 Alignment errors
0 2 collision frames 0 FCS errors
0 3 collision frames 0 Oversize frames
0 4 collision frames 0 Undersize frames
0 5 collision frames 0 Collision fragments
0 6 collision frames
0 7 collision frames 209535 Minimum size frames
0 8 collision frames 80863983 65 to 127 byte frames
0 9 collision frames 224041361 128 to 255 byte frames
0 10 collision frames 2219248 256 to 511 byte frames
0 11 collision frames 4459538 512 to 1023 byte frames
0 12 collision frames 9550732 1024 to 1518 byte frames
0 13 collision frames 0 Overrun frames
0 14 collision frames 0 Pause frames
0 15 collision frames
0 Excessive collisions 0 Symbol error frames
0 Late collisions 0 Invalid frames, too large
0 VLAN discard frames 893204 Valid frames, too large
0 Excess defer frames 0 Invalid frames, too small
1952398 64 byte frames 0 Valid frames, too small
154463974 127 byte frames
237141290 255 byte frames 0 Too old frames
4830932 511 byte frames 0 Valid oversize frames
8928830 1023 byte frames 0 System FCS error frames
5660485 1518 byte frames 0 RxPortFifoFull drop frame
5401499 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames

[Leo Laohoo]

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@nomansafdar wrote:

i have 15 access switches and 9 of them went to err-disabled

---

Output looks good. 
WHERE are the err-disable happening?  On the access switches or the core switch? 

The next time something like this occurs, show us the output to the command "sh interface status err".

[nomansafdar]

it's happening in the access switces. core switches remains active