[c-nsp] Loss of Telnet Capability - RESOLVED

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Thu Jul 29 06:04:22 EDT 2004


Dinesh <> wrote on Thursday, July 29, 2004 11:31 AM:

> We also faced the same problem today and the same is resolved after
> clear the user by using the clear tcp line vty ** command.
> 
>  Can anyone brief me what is TCB address.

TCB (transmission control block) is in internal IOS data structure to
manage TCP connections..

	oli

> ----- Original Message -----
> From: "Richard J. Sears" <rsears at adnc.com>
> To: <cisco-nsp at puck.nether.net>
> Sent: Thursday, July 29, 2004 1:48 AM
> Subject: [c-nsp] Loss of Telnet Capability - RESOLVED
> 
> 
>> Thanks to everyone who provided suggestions. The problem has been
>> resolved. 
>> 
>> There was a telnet connection on vty 2 that I was unable to clear.
>> Thanks to Laris Benkis <laris at tpn.cc> who reminded me of the sho tcp
>> brief command, I was able to locate the tcb number of the established
>> session (which was really no longer connected) and nuke it with a
>> clear tcp tcb # command. 
>> 
>> As soon as I did that, telnet was immediately restored to the router.
>> 
>> Thanks again for everyone's suggestions and help.
>> 
>> ******************************************
>> Richard J. Sears
>> Vice President
>> American Digital Network
>> ----------------------------------------------------
>> rsears at adnc.com
>> http://www.adnc.com
>> ---------------------------------------------------- 858.576.4272 -
>> Phone 858.427.2401 - Fax
>> INOC-DBA - 6130
>> ----------------------------------------------------
>> 
>> I fly because it releases my mind
>> from the tyranny of petty things . .
>> 
>> 
>> "Work like you don't need the money, love like you've
>> never been hurt and dance like you do when nobody's
>> watching."
>> 
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