Every time when I hit the 'dir' command, it is freeze.

[CATYO]

Hello, 

Is there anyone who knows about this issue? 

I am using a console cable to connect to the 2960-L cisco switch and want to see the files in the memory. 

When I typed and hit the dir command, the switch froze like below and it came back after 10 minutes. 

Switch#dir
Directory of flash:/

516 drwx 2048 Jul 9 2024 01:24:24 +00:00 c2960l-universalk9-mz.152-6.E
707 drwx 2048 Jul 9 2024 01:24:24 +00:00 dc_profile_dir (freeze)

(after 10 minutes)

809 -rwx 1922 Jan 11 2022 13:11:02 +00:00 private-config.text
810 -rwx 2072 Jan 11 2022 13:11:02 +00:00 multiple-fs
261 -rwx 796 Nov 17 2021 19:56:09 +00:00 vlan.dat
2 drwx 2048 Mar 1 1993 00:00:02 +00:00 lost+found

I had tried several times but results were same. 

Do you happen to know what is the reason for this?

Thank you

[Reza Sharifi]

Hi,

Maybe a CPU issue? Try "sh process cpu sort" and see the CPU utilization.

or

"sh process cpu sort | ex 0.00"

HTH

[CATYO]

Thanks, I will check this but actually, this device is not connected anywhere and really basic configuration in it. but let me check the CPU loads after it is back.

[CATYO]

Switch#show processes cpu sorted

CPU utilization for five seconds: 1%/0%; one minute: 1%; five minutes: 1%

CPU is okay. 

[Reza Sharifi]

ok, good to know that the CPU is working fine. Does "sh flash" also freezes the switch?

[CATYO]

Yeah, It happens as well. 

Interestingly, I just connected to the switch with one LAN cable to port number 1 and assigned ip address like 192.168.x.100 in port 1 on Switch and configured same subnet ip address l192.168.x.101 to see the CPU. Now I have 2 connections between my laptop and swtich (console / LAN port with IP)

I can telnet to switch and ping to switch with the ip address but once I hit the dir command on my console connection, switch kick the ip connection out and ping dropped. 

I have never seen this before.  

[CATYO]

released many typo. 

192.168.x.100 is assigned in port 1 on SW and 192.168.x.101 is assigned on the laptop to see the CPU load. 

[Georg Pauwen]

Hello,

check if there are hung tcp sessions:

show tcp brief

You can clear these sessions with the command:

clear tcp tcb

followed by the tcb session number.

[CATYO]

I am away from the test lab now but I am pretty sure that there is no or little tcp connection. 

because I tested after rebooting and there was no connection except between my laptop. 

[Leo Laohoo]

Could be a bug.

[CATYO]

It could be. Do you think factory reset can solve this issue?

[marce1000]

 - Consider using the (latest) advisory software release (upgrade) for your device : https://software.cisco.com/download/home/281231709/type/280805680/release/12.2.55-SE12 , check if that can help.

 M.

[johnlloyd_13]

hi,

can you do a 'show flash' instead and observe if it also freezes?

what terminal emulator are you using for console? try other software, i.e. teraterm, secure CRT, etc.