N3048 cannot leave ssh sessions with firmware 6.3.0.3

I recently updated a stand-alone switch N3048 for the latest firmware 6.3.0.3, A14 (filename = N3000_N2000v6.3.0.3.stk) 6.2.7.2, A10 and it seems, I can't leave a SSH session to the switch (via the OOB interface). I can connect with several configured users and the switch works fine otherwise, but from entering exit the SSH session is suspended. It looks like the following on a switch with m1940 hostname:

M1940 #exit
M1940 > output<-- hangs="" here,="" not="" even="" a="" newline="" after="" hitting="">

Connecting to the switch via the serial console, I see that 'show ip ssh' is empty and shows no active sessions. In addition, the switch generates the message "User has disconnected" in syslog. However, the real SSH session of my management station is still alive, and actually living remains permanently it seems. I left such a session open all night after the * IDLE TIMEOUT * had it done automatically on the switch and the next morning, the SSH session and underlying session TCP were always persistent.

After reloading via the serial console switch the SSH session disconnect properly by following a generic box of RHEL 6 on my management station:

M1940 connection closed by remote host.
Closed connection to m1940.

For me, it's just a further indication that the SSH session remains active after a user, there are sessions on the switch.

Also has anyone seen this behavior? Someone at - it a data point of SSH sessions behaving normally with this new firmware?

Your observations are correct, that Dell Networking OS 6.3.0.3 is no longer available for download from the Dell eSupport site. If you have all of the switches currently on 6.3.0.3, I suggest rolling back to 6.2.7.2.

I don't have any official information from Dell on the exact reason the firmware was pulled. But according to my observations, it seems that there are certain undesirable behaviors in the version of the firmware. Including those discussed here on the forums. Rather than wait for the next firmware correct these behaviors, the firmware is shot, quickly being developed and should hopefully be reissued in due course.

Tags: Dell Switches

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