There were several problems with the SSH and CLI implementation in N/S/K series that could result in a stuck SSH session. Starting with 7.4x the SSH session runs a keep alive protocol that disconnects the session based on a 10 or 15 second timeout. Putty fails to maintain keep alive protocol when the scroll bar is “held down” (selected with left mouse button held down) and when you have selected “change settings”. The SSH bugs and the putty failure to maintain protocol combine to cause unintended disconnects that sometimes hang. Resetting the MGMT master blade is the only way to terminate a session if it is stuck due to the firmware bug.
S & K series 7.72.02 increased the timeout (to reduce exposure to the putty bug) and resolved all known session hang conditions. This will be addressed in 7.62.04 for N series. *From:* Lou H. Goddard [mailto:[email protected]] *Sent:* Wednesday, November 14, 2012 1:58 PM *To:* Enterasys Customer Mailing List *Subject:* RE: [enterasys] Kicking users off of a switch Do you think it could be the quality of the ssh daemon on the equipment? I've been using puTTY for years and only found it to misbehave on Enterasys equipment. I've seen it have issues on A2s and RBT4102s with session teardown. Thanks, Lou Goddard Network Engineer 302-552-8053 [email protected] ------------------------------ *From: *Nick Allen <[email protected]> *Sent: *Wed, 11/14/2012 1:33pm *To: *Enterasys Customer Mailing List <[email protected]> *Subject: *Re: [enterasys] Kicking users off of a switch Can you not telnet in and disable ssh and then reenable it. Putty is awful on some of our C series switches - aborts the session frequently on commands which have a lot of output - but MobaXterm works well - although with some old versions of firmware, connecting with MobaXterm (OpenSSH) can cause a switch reset. N. On 14 Nov 2012, at 18:23, John Kaftan <[email protected]> wrote: Thanks: Turns out I can't get rid of them even with the disconnect command. I've been using Putty on a Windows 7 machine to connect and it crashes a lot. Have others found Putty unstable on Win7? When it crashes it leaves a hung session on the S4. I get 4 of those before I am locked out. The only way to recover is to reboot. Enterasys has a fix in their latest release. I've switched to Tera Term. John On Wed, Nov 14, 2012 at 1:00 PM, José Luis Aguilar Ibarrola < [email protected]> wrote: disconnect x.x.x.x (ip address) *José Luis Aguilar Ibarrola | Consultor | CASSA DF* *Tel: +52-555-534-5080 | Cel: +52-553-038-7546* Msn: [email protected] Skype: jl_aguilar *De:* John Kaftan [mailto:[email protected]] *Enviado el:* miércoles, 14 de noviembre de 2012 11:39 a.m. *Para:* Enterasys Customer Mailing List *Asunto:* [enterasys] Kicking users off of a switch Looking for a way to disconnect remote sessions from the admin console of an S4. I have stale sessions in there that need to be blown out, but I am not finding the command to do so. Thanks -- John Kaftan IT Infrastructure Manager Utica College - --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] - --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] -- John Kaftan IT Infrastructure Manager Utica College - --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] - --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] -- This e-mail is intended only for the named person or entity to which it is addressed and contains valuable business information that is proprietary, privileged, confidential and/or otherwise protected from disclosure. If you received this e-mail in error, any review, use, dissemination, distribution or copying of this e-mail is strictly prohibited. Please notify us immediately of the error via e-mail to [email protected] and please delete the e-mail from your system, retaining no copies in any media. We appreciate your cooperation. ------------------ CONFIDENTIALITY NOTICE --------------- This message, including any attachments, is for the sole use of the intended recipient(s) and may contain privileged confidential information protected by law. Any unauthorized review, use, disclosure or distribution of this message is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of this message. ------------------ CONFIDENTIALITY NOTICE --------------- - --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
