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Experts,

Can someone explain the difference between the line configuration commands exec-timeout and session-timeout? Can you give a scenario for how each is used?

TIA!

 

 

imagine the following topology

PC---R2---R3

Let's say you open telnet connection from PC to R2 and log into exec shell (usually this is the default). If you leave your shell inactive for the period of "exec-timeout" configured on R2 VTYs, then R2 will close you exec session and terminate telnet connection.

Now imagine you telnet from PC to R2 and then to R3. At this moment, if you leave your shell idle on R3, one of the following will happen. Either "exec-timeout" configured on R3 expires, and R3 teminates your shell OR "session-timeout" configured on R2 VTY lines expires and R2 closes your outgoing connection. This depends on which timeout has smaller  value.

Keep in mind, "session-timeout" is for sessions originated out from this VTY, while "exec-timeout" is for EXEC sessions started when someone logs into this VTY.

 

Petr,

Have you tried to lab up the session-timeout line configuration command? It doesn't seem to do for me what you are saying here that it does.

------Original Message------
From: Petr Lapukhov
Sender: ccie-rs@ieoc.com
To: bkvalentine@gmail.com
ReplyTo: ccie-rs@ieoc.com
Sent: Jul 26, 2008 3:40 PM
Subject: Re: [CCIE R&S] exec-timeout vs. session-timeout

imagine the following topology
PC---R2---R3
Let's say you open telnet connection from PC to R2 and log into exec shell (usually this is the default). If you leave your shell inactive for the period of "exec-timeout" configured on R2 VTYs, then R2 will close you exec session and terminate telnet connection.
Now imagine you telnet from PC to R2 and then to R3. At this moment, if you leave your shell idle on R3, one of the following will happen. Either "exec-timeout" configured on R3 expires, and R3 teminates your shell OR "session-timeout" configured on R2 VTY lines expires and R2 closes your outgoing connection. This depends on which timeout has smaller  value.
Keep in mind, "session-timeout" is for sessions originated out from this VTY, while "exec-timeout" is for EXEC sessions started when someone logs into this VTY.
 



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Sent via BlackBerry from T-Mobile

Mr. Petr Lapukhov's conceptual explanation is correct.

it works...

 

 

 

 

 

I verified it too. Works as Petr said (although his words don't need verifications ;-) )

 

maguphe: what's the difference between your example and Petr's?