Issue regarding upgrading ios in C9200

[kevin2001]

Hi, we have an upgrading ios issue when upgrading new ios to cisco 9200 switch. Please see below. after entering copy command, the transferring starts. it show a lot "O" among exclamation. It is normal? and The uploading is completed successfully?
Thanks

[marce1000 · Accepted solution]

 - "O" means that a packet was received out of sequence during the tftp transfer. This is not a problem;
    verify the md5sum of the transferred image on the switch (too) using verify /md5 flash:<cat....SPA.bin>

  M.

[kevin2001]

Thank you very much for your reply. 

How about the below info during copying ios? some point " . " among the exclamation 

[Jan Rolny]

Hi,

A period (.) indicates a timeout. So, no data are transferred.

you can find the answer for instance here 

https://community.cisco.com/t5/switching/tftp-image-file-tranfer-out-of-sequence/td-p/1986184

and I found something also here on cisco.com

https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/fundamentals/configuration/guide/2_xe/cf_xe_book/cf_file-transfer_xe.html

Best regards,

Jan

[parickwarren1]

Hey, glad you got your answer. Just make sure to double-check the file that was uploaded to confirm the transfer actually completed cleanly. You can find the md5 checksum under the file info oin the cisco downlolad page for that version.