[c-nsp] Unable to clear vty session on 3750

[Tóth András]

Hi,

Try the 'clear line vty <num>' command as well to clear out the stuck session.

The version number you provided is the rommon version, you need the
first line of 'sh ver' instead. You might be hitting CSCte52821
though.

Best regards,
Andras

On Tue, Jul 31, 2012 at 1:02 PM, Nick Hilliard <nick at foobar.org> wrote:
> On 31/07/2012 10:29, Bouazza Djamel wrote:
>> I have an issue today with nombers of vty sessions.We have no console
>> access for this device.See below please :
>
> three options here:
>
> 1.  configure a timer on the vty and use TCP keepalives to stop this from
> happening in future:
>
> switch#conf t
> switch(config)#service tcp-keepalives-in
> switch(config)#service tcp-keepalives-out
> switch(config)#line vty 0 15
> switch(config)# exec-timeout 5
>
> If this fails to clear things after 30 minutes, then try:
>
> 2.  clear the TCB (transmission control block - an internal TCP data
> structure) for each vty line.
>
> You can get the TCB id for each line using:
>
> switch#show tcp brief
>
> It's in the first column.  Confirm it first with:
>
> switch#show tcp tcb <tcbid>
>
> You can clear the TCB using:
>
> switch#clear tcp tcb <tcbid>
>
> If this fails:
>
> 3. reboot.
>
> Probably #2 will work this time and #1 will prevent the problem from
> recurring in future.
>
> Nick
>
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