From your console connection check what you have configured under VTY - just in case someone has gone ahead and change to SSH for example.
transport input ######### - the specific config Also what does the "show line" give you ? Paul -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Richard J. Sears Sent: Wednesday, July 28, 2004 3:35 PM To: Jason Frisvold Cc: Nanog Subject: Re: Loss of Telnet Capability to 6509 Hi Jason, the only ACL's on the vty's are the same across my entire farm of routers and switches. And when I telnet to a box with an ACL, I get a refused connection...this one is saying that it is timing out. On Wed, 28 Jul 2004 15:33:45 -0400 "Jason Frisvold" <friz@corp.ptd.net> wrote:
Do you have ACL's restricting access to the vty's? I've seen instances
where telnet ports get locked up because of port scanning and/or attacks...
-- Jason Frisvold Penteledata
-----Original Message----- From: Richard J. Sears [mailto:rsears@adnc.com] Sent: Wednesday, July 28, 2004 2:54 PM To: Nanog Subject: Loss of Telnet Capability to 6509
We posted this to cisco-nsp but someone suggested posting it here as well...
We have a 6509 running a SUP720 in IOS only mode (no cat os).
At around 4am this morning, we lost our ability to telnet to the router. Running a tcpdump shows that the router never responds to the telnet request.
All functions and interfaces on the router seem fine (bgp, etherchannel, ibgp, vtp, hsrp) and I can console into the sup with no problems at all, we just cannot telnet into it. The CPU is at around 6%.
I have checked all access lists on the router, none were added/removed or modified on line vty that would cause this problem. All logging appears normal.
We are running Version 12.2(17a)SX3.
Anyone have a similar problem or know how to check or restart the telnet process on the router without a reload...?
****************************************** Richard J. Sears Vice President American Digital Network ---------------------------------------------------- rsears@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."
****************************************** Richard J. Sears Vice President American Digital Network ---------------------------------------------------- rsears@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."