Cisco Catalyst 9200 Ports stop working suddenly and requires Reset

[Beginner]

Hello All, 

I faced some issues with c9200 series switches where the users remained connected via LAN directly to the switch and all of a sudden the connected port stopped working with no LED status. When I did the admin shut and no shut that particular port, the port started working and they had to re-plug the cable post resetting the port. We don't have any security configured in the switch and also no BPDU guard enabled on the port level. Here is the config that I've used:

!
interface GigabitEthernet1/0/1
description ** Kept for End-Devices **
switchport mode access
spanning-tree portfast
!

Kindly suggest what could be the issue behind this problem because more and more users are facing such problems not very frequently but sometimes this creates huge pain in the head***

[Flavio Miranda]

Hi

 Smell like bug to me.

When the problem happen, before you do anything, can you check to see if the affected client does have entry on the mac addres table?

[Beginner]

Hi Miranda, 

The problem first appeared a couple of days back and to resolve the issue since the users were impacted in the production Env. I tried resetting the ports which worked.

I can check for the Mac entry once the problem will appear again. 

However, if this will be a bug, then what could be the possible fix for this?

[balaji.bandi]

what is the IOS XE code running, check any new version you can uplift see if that fix the issue ?

if this effecting Live environment - then raise an TAC case to investigate.

[Beginner]

The device is running on the latest software image. 

Will check with the TAC support. 

Thanks 

[Leo Laohoo]

---

@Beginner wrote:

The device is running on the latest software image.

---

What exact version?

[Beginner]

S/w version is 16.12.4

[Leo Laohoo]

Raise a TAC Case and get them to verify if this is CSCvz54607.  

NOTE:  When raising TAC Cases, make sure to re-route/re-queue to ME/Euro or RTP desk.  

[marce1000]

 - Check the logs , preferably use a syslog server as a log-collector, gives better logging management and review opportunities too.

 M.

[Leo Laohoo]

Post the complete output to the command "sh interface Gi1/0/1 controller".  

NOTE:  Do not post screenshots. 

The next time this happens, post the complete output to the command "sh interface status error".

[Beginner]

Hi, 

A similar problem just appeared but seems it is on another switch and for the first time.

However, here are the outputs of the command as requested:

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sh interfaces gigabitEthernet 1/0/24 controller
GigabitEthernet1/0/24 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is bcd2.9503.0a98 (bia bcd2.9503.0a98)
Description: ** Kept for End-Devices **
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 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 10/100/1000BaseTX
input flow-control is on, 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: 0/2000/0/0 (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
Output 0 broadcasts (0 multicasts)
0 output errors, 0 collisions, 2 interface resets
0 unknown protocol drops
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 GigabitEthernet1/0/24 Receive
0 Total bytes 0 Total bytes
0 Unicast frames 0 Unicast frames
0 Unicast bytes 0 Unicast bytes
0 Multicast frames 0 Multicast frames
0 Multicast bytes 0 Multicast bytes
0 Broadcast frames 0 Broadcast frames
0 Broadcast bytes 0 Broadcast bytes
0 System FCS error frames 0 IpgViolation frames
0 MacUnderrun frames 0 MacOverrun frames
0 Pause frames 0 Pause frames
0 Cos 0 Pause frames 0 Cos 0 Pause frames
0 Cos 1 Pause frames 0 Cos 1 Pause frames
0 Cos 2 Pause frames 0 Cos 2 Pause frames
0 Cos 3 Pause frames 0 Cos 3 Pause frames
0 Cos 4 Pause frames 0 Cos 4 Pause frames
0 Cos 5 Pause frames 0 Cos 5 Pause frames
0 Cos 6 Pause frames 0 Cos 6 Pause frames
0 Cos 7 Pause frames 0 Cos 7 Pause frames
0 Oam frames 0 OamProcessed frames
0 Oam frames 0 OamDropped frames
0 Minimum size frames 0 Minimum size frames
0 65 to 127 byte frames 0 65 to 127 byte frames
0 128 to 255 byte frames 0 128 to 255 byte frames
0 256 to 511 byte frames 0 256 to 511 byte frames
0 512 to 1023 byte frames 0 512 to 1023 byte frames
0 1024 to 1518 byte frames 0 1024 to 1518 byte frames
0 1519 to 2047 byte frames 0 1519 to 2047 byte frames
0 2048 to 4095 byte frames 0 2048 to 4095 byte frames
0 4096 to 8191 byte frames 0 4096 to 8191 byte frames
0 8192 to 16383 byte frames 0 8192 to 16383 byte frames
0 16384 to 32767 byte frame 0 16384 to 32767 byte frame
0 > 32768 byte frames 0 > 32768 byte frames
0 Late collision frames 0 SymbolErr frames
0 Excess Defer frames 0 Collision fragments
0 Good (1 coll) frames 0 ValidUnderSize frames
0 Good (>1 coll) frames 0 InvalidOverSize frames
0 Deferred frames 0 ValidOverSize frames
0 Gold frames dropped 0 FcsErr frames
0 Gold frames truncated
0 Gold frames successful
0 1 collision frames
0 2 collision frames
0 3 collision frames
0 4 collision frames
0 5 collision frames
0 6 collision frames
0 7 collision frames
0 8 collision frames
0 9 collision frames
0 10 collision frames
0 11 collision frames
0 12 collision frames
0 13 collision frames
0 14 collision frames
0 15 collision frames
0 Excess collision frames

LAST UPDATE 8283306836 msecs AGO

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