Unexpected closing an SSH session while backing up

postmaster-sigma · ‎01-19-2022

Hello

We have a certain amount of Cisco SF-350 whose configurations backed up remotely by SSH

From time to time, one of them unexpectedly and randomly closes the remote connection during the backup

Only one closed SSH connection message appears in the logs from the switch

From TCP dump I could see some re-transmission before resetting ( But them also appears in "successful session" )

We use the latest firmware and many other network devices ( Different models of Cisco and other manufacturers as well ) in the same network works fine

Maybe someone could help with it

marce1000 · ‎01-19-2022

- You may also use an ssh-client which can do verbose mode (such as native linux ssh) , using verbose mode may provide more understandable messages as to what is going on.

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

Georg Pauwen · ‎01-19-2022

Hello,

tough one to troubleshoot, as you don't know if the switch or the remote end are closing the connection. What remote device are the configs backed up to ?

postmaster-sigma · ‎01-20-2022

We using Centos with Unimus which just copy config as text

From linux machine logs we see that connection is closed by Cisco in random moments between commands during backup