Cant console into Catalyst 4507

Unanswered Question
Jan 26th, 2010

Hello All,

I have some strange problem while trying to use the console to configure Catalyst 4507, Im using rollover cable, normal serial setting (9600-8-none-1-none). Switch has 2 supervisor engines ( Supervisor II-Plus).

The problem is that, I can see everything on the console, normal booting sequence, IOS image decompression, all messages that show normal synchronisation with the other supervisor engine. then when it reaches the part when it says Press Enter to start, I cant type anything, i still can see all the messages (like when I pull the other supervisor engine out) it gives me the message that it was pulled out, yet I cant type anything. Same thing with the second sup-engine. Unfortunately, Telnet and Aux port are not set, so they are unusable.


Can anyone help please? All suggestions are welcomed.


Thanks

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Average Rating: 0 (0 ratings)
sachinraja Tue, 01/26/2010 - 09:17

HI Baher

Is this  a new switch ? Are you installing it for the first time ? If so, can you pls boot the switch with only one SUP to start with, and see if it comes up... and then insert the second later ? Are the LEDs green on the switch ? do you see any other error messages during boot ? Can you copy paste the boot sequence if possible ?

Raj

CSCO10992439 Tue, 01/26/2010 - 11:47

HHi Raj,

  Thanks for your reply.

The switch is not new, its been working for years. But I needed to reconfigure it to comply with the new network design we're having. I issued the command (erase startup-config) to start from scratch, do you think this might be the problem? Note that the configuration was resynchronised from the second SUP and same config was loaded in the switch again. I know, I should have used one SUP at a time while deleting the config.

  This whole issue happened before, its not the first time. After trying to unplug/re-plug the console cable or closing terminal emulator program and starting it again, these steps used to fix the problem. But this time its persistent, it never accepts any command, not even the Ctrl+C to start ROMMON mode.

  I've tried what you suggested by starting with one SUP only, same problem happaned, tried with the second SUP (installed in the first slot) only, same problem again.

  All messages are about successful synchronising with the standby SUP, although there is one error massage about IOS mismatch between the SUPs although they both have the same IOS version which is 12.2(25) EWA4.

  Config Reg is 0x2101. I will post the boot sequence/messages tomorrow when Im at work.

Thanks again Raj

CSCO10992439 Wed, 01/27/2010 - 00:42

Hi Krishna,

Thanks for your reply.

Unfortunately, this is the main problem, I cannot input any command in the console session, not even Ctrl+C at the beginning to the booting sequence

Cheers

krishnakumarr Wed, 01/27/2010 - 00:51

Hi

You can telnet/ssh to the switch , you can take this out put

the console will work primary sup engine only the secondary sup will dispaly standby mode

regards

krishna

CSCO10992439 Wed, 01/27/2010 - 00:57

no passwords were set, so I only can get into " Switch> " mode. will I be able to run show module?

krishnakumarr Wed, 01/27/2010 - 00:58

Hi

As per the log there is no issue in booth sup engines the config sync happend both sup

you can verify the sup engine status show module  and it shows which one is primary & secondary

can u change the config register value to 0X2102

regards

krishna kumar

CSCO10992439 Wed, 01/27/2010 - 01:12

I have an engineer on the site now, I asked him to telnet into the switch and run the show module command from the user exec mode. Will post the output as soon as I get them. Is it possible to change the config register from the user exec mode? should it be 0x2102? if so what does 0x2101 mean? and could it be changed by itself?

CSCO10992439 Wed, 01/27/2010 - 02:24

Hi,

  This is the output of show module command:

show module

Chassis Type : WS-C4507R

Power consumed by backplane : 40 Watts

Mod Ports Card Type                              Model              Serial No.

---+-----+--------------------------------------+------------------+-----------

1     2  Supervisor II+ 1000BaseX (GBIC)        WS-X4013+          JAE1005V9SX

2     2  Supervisor II+ 1000BaseX (GBIC)        WS-X4013+          JAE1004UBAS

3    24  10/100/1000BaseT (RJ45)                WS-X4424-GB-RJ45   JAE1002TSSA

4    24  10/100/1000BaseT (RJ45)                WS-X4424-GB-RJ45   JAB07080788

M MAC addresses                    Hw  Fw           Sw               Status

--+--------------------------------+---+------------+----------------+---------

1 0016.9d95.7c40 to 0016.9d95.7c41 4.1 12.2(20r)EW1 12.2(25)EWA4     Ok

2 0016.9d95.7c42 to 0016.9d95.7c43 4.1 12.2(20r)EW1 12.2(25)EWA4,    Ok

3 0015.c62c.b448 to 0015.c62c.b45f 1.7                               Ok

4 000a.f413.a0a0 to 000a.f413.a0b7 1.5                               Ok

Mod  Redundancy role     Redundancy mode     Redundancy status

----+-------------------+-------------------+-------------------

1   Active Supervisor   RPR                 Active

2   Standby Supervisor  RPR                 Standby cold

  Hope it helps

Regards

krishnakumarr Wed, 01/27/2010 - 03:06

Hi

From the log I can see the issue has been resolved

Any query pl let me know

reagards

krishna kumar

CSCO10992439 Wed, 01/27/2010 - 03:41

Hi,

  Its not been resolved, this output is from telnet, user exec mode, I cant get into privileged mode because no passwords were set. And most importantly, main problem still there, which is I cannot input commands via console session.

  Thanks again

krishnakumarr Wed, 01/27/2010 - 06:17

Hi


Remove secondary supevervisor and reboot with one supervisor engine  whether you can able to configure the swith ,

check the ScrLK is eabled when connected to hyperteminal

regards

krishna

CSCO10992439 Wed, 01/27/2010 - 06:52

Hi Krishna,

  I've tried to boot with one SUP at a time, same problem. Regarding the ScLK, thats a very good point, I've never known or even noticed this before, I will try it out and get back to you.

Update: I've just remembered that I used the same console cable, laptop and even left the same console session opened, and connected the cable to another switch (2970) and it worked just fine.

Do you think this 4507 has different console setting? can it be changed by itself for any reason?

also, as Im using the default settings:

  • Bits per sec:  9600
  • Data bits:  8
  • Parity:  none
  • Stop bits:  1
  • Flow control:  none
is there anyway I can know what the current settings for this switch? or I'll have to try different combination for all of these variables till I get it to work?

Thanks again

Reza Sharifi Wed, 01/27/2010 - 07:38

Hi Baher,

What application are using to console i.e, Putty, Secure CRT, MS Hyper Terminal?

Also I noticed that your config register is 0x2101.  Can you change it to 0x2102 and see if any luck?

HTH

Reza

CSCO10992439 Wed, 01/27/2010 - 07:51

Mike,

   Sure, I will check the console ports on both SUPs, as you said, you never know, and most importantly, I want to rule this out in case they are good. Is there anything specific I have to look at? I mean can I easily notice that its damaged? like bent pins and similar stuff?

Reza,

  Thanks for your reply,

I used MS Hyper Terminal and Putty. And yes, you're right, the conf reg is set on  0x2101. Is it possible that it was changed by itself? because as far as I know,  no one at my client's site is knowledgeable enough to change this. Another thing, can I change it from the user exec mode? note that I can telnet into the switch, but because there is no password being set, so user exec mode is the farthest I can get with it......

Thanks

burleyman Wed, 01/27/2010 - 07:59

You should be able to see a pin that is out of place. I saw it right away.

Mike

burleyman Wed, 01/27/2010 - 08:06

There could be a command under the Con0 preventing it... can you see if there is a  no exec  under Con0

Mike

CSCO10992439 Wed, 01/27/2010 - 08:17

last time I was able to login, I got a copy of sh run, but I don't have it right now, will paste it here tomorrow. I remember looking at the console line and it was something very similar to this:

line con 0

stopbits 1

line aux 0

line vty 0 4

login

  but will confirm this tomorrow

Thanks

burleyman Wed, 01/27/2010 - 07:06

Baher,

I had a simular issue like this. I am going to assume you tried different rollover cables....correct.

My issue was a connector in the console port on the switch was bent and not making contact. I would take a flashlight and look at the connectors inside the console port and make sure they all look good. Also did you try using a different PC?

Mike

CSCO10992439 Wed, 01/27/2010 - 07:15

Hi Mike,

  Thanks for your reply.

I've tried many console cables, laptops...all with the same results. And as I modified my post above, I used the same (not working) console session and plugged it to another switch (2970) and it worked fine, plug it again to the 4507....I got nothing on the screen. Now to answer the second past of your suggestion, this switch has 2x SUP II+, and they both are acting the same, do you think its possible that both console ports are damaged? it might be, but I find it very unlikely, right?

Thank you all guys....

burleyman Wed, 01/27/2010 - 07:37

I did think that 2 sup's being damaged would be a strech but you never know and it would not take much to check. That did turn out to be our issue. I will keep thinking.

Mike

sachinraja Wed, 01/27/2010 - 11:16

Hi

Apart from the console access through hyperterminal (after the switch is UP), are you able to see the boot sequence on console ??? if your hyperterminal works and console cable works good, you should atleast see the supervisor booting, and showing till you get the Console login ... let us know if you get this..

Raj

CSCO10992439 Wed, 01/27/2010 - 11:30

Hi Raj, yes I can see booting sequence, you can check my above posts, I have attached the boot sequence to one of my earlier posts. I can read all console messages, yet cant input any key strokes in...

sachinraja Wed, 01/27/2010 - 12:08

Im sorry Baher. My bad.. Didnt have a look at the boot sequence.. So, which Supervisor module are you looking this on ? primary or secondary ? supervisor 1 can be secondary if during boot sup 2 took over as primary (show module will confirm this).. so, make sure you check the console output from both the supervisors.. I went through bug navigator and didnt find anything suspicious.. attaching the bug list for 12.2(25)EWA4 with regards to console issues>

Raj

CSCO10992439 Wed, 01/27/2010 - 12:20

Hi Raj, no worries. Thanks for your reply. Im on the primary SUP and its the active. below is the output of show module, that was requested by krishna earlier:

show module

Chassis Type : WS-C4507R

Power consumed by backplane : 40 Watts

Mod Ports Card Type                              Model              Serial No.

---+-----+--------------------------------------+------------------+-----------

1     2  Supervisor II+ 1000BaseX (GBIC)        WS-X4013+          JAE1005V9SX

2     2  Supervisor II+ 1000BaseX (GBIC)        WS-X4013+          JAE1004UBAS

3    24  10/100/1000BaseT (RJ45)                WS-X4424-GB-RJ45   JAE1002TSSA

4    24  10/100/1000BaseT (RJ45)                WS-X4424-GB-RJ45   JAB07080788

M MAC addresses                    Hw  Fw           Sw               Status

--+--------------------------------+---+------------+----------------+---------

1 0016.9d95.7c40 to 0016.9d95.7c41 4.1 12.2(20r)EW1 12.2(25)EWA4     Ok

2 0016.9d95.7c42 to 0016.9d95.7c43 4.1 12.2(20r)EW1 12.2(25)EWA4,    Ok

3 0015.c62c.b448 to 0015.c62c.b45f 1.7                               Ok

4 000a.f413.a0a0 to 000a.f413.a0b7 1.5                               Ok

Mod  Redundancy role     Redundancy mode     Redundancy status

----+-------------------+-------------------+-------------------

1   Active Supervisor   RPR                 Active

2   Standby Supervisor  RPR                 Standby cold

Hope this helps

sachinraja Wed, 01/27/2010 - 12:41

Can you force redundancy to swap the connection onto the secondary supervisor module ? make sure you have ACTIVE status on module 2 when you do this.. and module 1 becomes standby... check console connectivity on module 2... with Sup II plus, you would just have a single console and single iP address available for management , so you need to check.... you can reboot the primary SUP, to make it secondary (manually),.. you can also do "redundancy reload peer" to reload the secondary supervisor (not reqd in this case)...

Raj

CSCO10992439 Wed, 01/27/2010 - 13:14

Can I do this from user exec mode? I can telnet into the switch, and can only reach user exec mode because there are no passwords being set on telnet nor console. Last time I logged in the switch, I deleted start-up config, then issued a reload, I think here the secondary Sup became the active and replicated the config back again to the primary Sup. Not sure how this works really, does primary Sup suppose to be active again once its done booting? or it will only be active when the secondary Sup becomes unavailable or rebooted?

  Also, I have tried to boot the switch with one Sup at a time (in the first module slot) yet same problem persists

Reza Sharifi Wed, 01/27/2010 - 13:50

Hi Baher,

Can you try another console application beside MS Hyper Terminal like Secure CRT?

Also you can't force the backup Sup to be the primary from the user exec mode, but if every thing is configured correctly you should be able to pull the primary Sup out of the chassis and the backup Sup should become the primary Sup.  Then try the console on that Sup.

After all this is one way to make sure your Sup redundancy is working.

Make sure you do this during on outage window and are preperd in case the second Sup does not take over

HTH

Reza

CSCO10992439 Wed, 01/27/2010 - 20:42

Hi Reza,

Thanks for your reply

I will try Secure CRT and will let you know if it helped.

So you mean I should pull the primary Sup from its slot and booting up the switch from the secondary Sup (while it is on its slot "2"). If thats what you mean, I tried so many combinations, but dont remember if I did this or not, I will give it a try. But thanks for letting me know about the fact that I cant force the secondary Sup to be primary just by installing it in the primary's slot.

The good thing is that the switch is pulled out of the production datacentre for now, so I can freely work on it without any network outage, the problem is it was supposed to be 1-2 days task , now its been a week and no solution seems to be working.

Let me ask you this, is there any procedure I can do in hardware to delete the start-up config, or to reset the switch to factory default but with keeping the IOS?

Alternatively, is there anyway to make the switch receive config from a text file? without giving it any command? at least I can set telnet password and configure it from there.

Last question, what the 10/100 Mgmt port's function on the Sup?

I cant believe cisco didnt think of restoring the switch, while all aux/telnet/console are inaccessible.....

Thanks for the help everyone....

krishnakumarr Wed, 01/27/2010 - 21:02

Hi

The management port is used for to install IOS  when it is corrupted ( recovery from missing or corrupted image ) pl find the attached doc for to restore the same

regards

krishna kumar

Attachment: 
CSCO10992439 Wed, 01/27/2010 - 22:22

Thanks Krishna for clearing the Management port's function out for me. This means I still have to issue Ctrl+C command to go to ROMMON mode in case I wanted to use this port. Not gonna help in my case......

krishnakumarr Wed, 01/27/2010 - 22:50

Hi

Final solution:

==========

Check the console port physically any rust has been formed.  Pl contact SI for RMA

regards

krishna kumar

CSCO10992439 Wed, 01/27/2010 - 23:13

Hi krishna, I will check the port physically once Im at the client's site next time. Although Im sure its not the problem. As it was working just fine and stopped suddenly after I issued (erase startup config) then (reload)....it got me to a mode that I only had exit and logout commands, then after rebooting it, I think it got the startup config from the secondary Sup.....after that I lost interaction with console port

CSCO10992439 Thu, 01/28/2010 - 01:17

Hello Guys,

  I was looking at the boot sequence of the switch, and I noticed that the switch is not decompressing the IOS, this is the switch sequence:

**********************************************************

*                                                        *

* Welcome to Rom Monitor for WS-X4013+ System.           *

* Copyright (c) 1999-2004 by Cisco Systems, Inc.         *

* All rights reserved.                                   *

*                                                        *

**********************************************************

Rom Monitor Program Version 12.2(20r)EW1

Supervisor: WS-X4013+  Chassis: WS-C4507

Hardware Revisions - Board: 5.10 CPLD: 34 Dagobah: 226

MAC Address  : 00-12-80-20-cd-04

Ip Address   : Not set.

Netmask      : Not set.

Gateway      : Not set.

TftpServer   : Not set.

Main Memory  : 256 MBytes

***** The system will autoboot in 5 seconds *****

Type control-C to prevent autobooting.

. . . . .

******** The system will autoboot now ********

config-register = 0x2101

Autobooting using the first file from bootflash.....

Rommon reg: 0xE2004180

##########

k2diags version 4.2.2_g

prod: WS-X4013+  part: 73-9272-05  serial: JAE1005V9SX

Power-on-self-test for Module 1:  WS-X4013+

Port/Test Status: (. = Pass, F = Fail, U = Untested)

Reset Reason: PowerUp

Port Traffic: L2 Serdes Loopback ...

0: .  1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: .

12: . 13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: .

24: . 25: . 26: . 27: . 28: . 29: . 30: . 31: .

Port Traffic: L2 Asic Loopback ...

0: .  1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: .

12: . 13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: .

24: . 25: . 26: . 27: . 28: . 29: . 30: . 31: .

Port Traffic: L3 Asic Loopback ...

0: .  1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: .

12: . 13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: .

24: . 25: . 26: . 27: . 28: . 29: . 30: . 31: .

Switch Subsystem Memory ...

1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: . 12: .

13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: . 24: .

25: . 26: . 27: . 28: . 29: . 30: . 31: . 32: . 33: . 34: . 35: . 36: .

37: . 38: . 39: . 40: . 41: . 42: . 43: . 44: . 45: . 46: . 47: . 48: .

49: . 50: . 51: . 52: . 53: . 54: . 55: .

Module 1 Passed


Exiting to ios...


Rommon reg: 0xE2000180

#####################################

              Restricted Rights Legend


Use, duplication, or disclosure by the Government is

subject to restrictions as set forth in subparagraph

(c) of the Commercial Computer Software - Restricted

Rights clause at FAR sec. 52.227-19 and subparagraph

(c) (1) (ii) of the Rights in Technical Data and Computer

Software clause at DFARS sec. 252.227-7013.

           cisco Systems, Inc.

           170 West Tasman Drive

           San Jose, California 95134-1706

Cisco IOS Software, Catalyst 4000 L3 Switch Software (cat4000-I9K91S-M), Version 12.2(25)EWA4, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2005 by Cisco Systems, Inc.

Compiled Fri 23-Sep-05 13:24 by ssearch

Image text-base: 0x10000000, data-base: 0x115EF984

Testing packet buffer memory:065536..done

All packet buffers passed.

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

cisco WS-C4507R (MPC8245) processor (revision 10) with 262144K bytes of memory.

Processor board ID FOX093913LG

MPC8245 CPU at 266Mhz, Supervisor II+

Last reset from PowerUp

1 Virtual Ethernet interface

52 Gigabit Ethernet interfaces

511K bytes of non-volatile configuration memory.

Uncompressed configuration from 1376 bytes to 3520 bytes

Press RETURN to get started!

Uncompressed configuration from 1376 bytes to 3520 bytes

00:00:02: %C4K_REDUNDANCY-6-INIT: Initializing as ACTIVE supervisor

00:00:17: %C4K_REDUNDANCY-6-DUPLEX_MODE: The peer Supervisor has been detected

00:00:35: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan

00:00:36: %C4K_IOSMODPORTMAN-6-MODULEONLINE: Module 1 (WS-X4013+ S/N: JAE1005V9SX Hw: 4.1) is online

00:00:36: %C4K_IOSMODPORTMAN-6-MODULEONLINE: Module 3 (WS-X4424-GB-RJ45 S/N: JAE1002TSSA Hw: 1.7) is online

00:00:36: %C4K_IOSMODPORTMAN-6-MODULEONLINE: Module 4 (WS-X4424-GB-RJ45 S/N: JAB07080788 Hw: 1.5) is online

00:00:37: %SYS-5-CONFIG_I: Configured from memory by console

00:00:37: %SYS-5-RESTART: System restarted --

Cisco IOS Software, Catalyst 4000 L3 Switch Software (cat4000-I9K91S-M), Version 12.2(25)EWA4, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2005 by Cisco Systems, Inc.

Compiled Fri 23-Sep-05 13:24 by ssearch

00:00:41: %C4K_REDUNDANCY-6-MODE: ACTIVE supervisor initializing for rpr mode

00:00:41: %C4K_REDUNDANCY-2-IOS_VERSION_CHECK_FAIL: IOS version mismatch. Active supervisor version is 12.2(25)EWA4,. Standby supervisor version is 12.2(25)EWA4,. Redundancy feature may not work as expected.

00:00:41: %C4K_IOSMODPORTMAN-6-MODULEONLINE: Module 2 (WS-X4013+ S/N: JAE1004UBAS Hw: 4.1) is online

00:00:41: %C4K_REDUNDANCY-3-COMMUNICATION: Communication with the peer Supervisor has been established

00:00:41: %C4K_REDUNDANCY-5-CONFIGSYNC: The bootvar has been successfully synchronized to the standby supervisor

00:00:41: %C4K_REDUNDANCY-5-CONFIGSYNC: The config-reg has been successfully synchronized to the standby supervisor

00:00:41: %C4K_REDUNDANCY-5-CALENDAR: The calendar has been successfully synchronized to the standby supervisor for the first time

00:00:41: %C4K_REDUNDANCY-5-CONFIGSYNC: The startup-config has been successfully synchronized to the standby supervisor

00:00:41: %C4K_REDUNDANCY-5-CONFIGSYNC: The private-config has been successfully synchronized to the standby supervisor

00:00:41: %C4K_REDUNDANCY-5-CONFIGSYNC_RATELIMIT: The vlan database has been successfully synchronized to the standby supervisor

As you can check the bold red font...its not decompressing the IOS, just like the following sample from one of cisco documentations:

Module 1 Passed


Exiting to ios...






Rommon reg: 0x30000180

Running IOS...

Decompressing the image
#############################################################
##############################################################
#############################################################
##############################################################
#############################################################
##############################################################
#############################################################
##############################################################
######################################################################### [OK]

              Restricted Rights Legend

Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraph
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
Software clause at DFARS sec. 252.227-7013.

           cisco Systems, Inc.
           170 West Tasman Drive
           San Jose, California 95134-1706

Will this ring any bell? I hope so...Im really getting hopeless here....

CSCO10992439 Thu, 01/28/2010 - 09:13

can someone guide me on what to do if a switch is inaccessible via console and telnet?

I really appreciate everyone's suggestions and help...

sachinraja Thu, 01/28/2010 - 09:22

Hi baher

Not sure if the IOS is an issue here.. it does decompress when you do a boot from rommon right ? do you have spare SUP or external flash cards ? If so,you can replace it and see if it solves the issue.. do you have support contract for this device?

Raj

CSCO10992439 Thu, 01/28/2010 - 09:27

Hi Raj,

Thanks for your reply. To answer your questions:

I havent done a boot from rommon, as I cant even input ctrl+c, is there anyway to go to rommon other than this?

I only have 2 SUPs which are currently installed in the switch chassis, and they both dont have external compact flash on them.

Lastly, unfortunately, I dont have support contract for this switch

Pavlo Bykov Thu, 01/28/2010 - 12:42

Well, this is a long shot, but:

We had this problem that sometimes to cut costs, manufacturers that produce crystals are not producing them very precisely. So what might be reported as 9600 baud is actually 10000 baud or something like that.

So here is what to do:

1. Get any Cisco router however old or new. 2500 will do, and so will 7206. What you need is a router with an aux port. So it needs to be a software router, which have aux ports.

2. Connect AUX port of the router to a CON port on the 4500

3. Login with a console or whatever to the router.

4. Look at the number of the aux port via "show line"

5. Add this number to 2000. E.g. if the AUX is line 33, the result will be 2033

6. Do a reverse telnet:

conf t

int loop 0

ip add 10.0.0.1 255.255.255.255

end

telnet 10.0.0.1 2033

The last number in reverse telnet must be the result of #5

Then see how it is working.

If it still does not work, try to experiment with bit settings, e.g. 8-N-2 and so on, because maybe they are changed on 4500..

CSCO10992439 Fri, 01/29/2010 - 13:09

Hello pavlo,

Apologies for the late reply. Thanks for your advice, I will try this reverse telnet procedure when Im at the client site next week. Just a couple of questions here if you dont mind...

1) The cable between router's aux port and the 4500 con port is suppose to be straight cable, right?

2) Is there any specific config I need to do under the router aux port to establish this connection?

3) In case the 4500 switch has different serial settings, like baud rate or other options, will this reverse telnet by pass this setting?

4) I think my client has 3845 router, it should have aux port as normal, and it should work with no problem, can you confirm?

Thanks again mate, I will let you know if this worked out or not as soon as I try it.

Pavlo Bykov Sun, 01/31/2010 - 11:53

Definitely try it. Here are the answers:

1. Yeah, straight cable will do.

2. No specific config. Just make sure router has an active IP address (UP/UP interface - loopback is good) which you are going

3. If it's a little difference (error in manufacturing) then yes, otherwise no. As I mentioned if it's other problem you'd need to try other terminal settings on your PC.

4. Yes, I can confirm that.

Please rate the posts if it'll work

CSCO10992439 Wed, 02/03/2010 - 22:38

Thanks for your reply, I will implement this procedure next week and will get back to you with the results. Sure thing I will rate mate!

Thanks,

Baher

CSCO10992439 Sat, 02/06/2010 - 23:48

Im at the client site now, I will try to reverse telnet into the switch. but before I do that here are some of the show commands that I could issue from the user exec mode, hope this could help

show bootvar

BOOT variable does not exist

CONFIG_FILE variable does not exist

BOOTLDR variable does not exist

Configuration register is 0x2101

Standby BOOT variable does not exist

Standby CONFIG_FILE variable does not exist

Standby BOOTLDR variable does not exist

Standby Configuration register is 0x2101

show bootflash:

-#- ED ----type---- --crc--- -seek-- nlen -length- ---------date/time--------- n

ame

1   .. image        849A6430  CABF18   33 13024920 Feb 12 2006 22:40:15 +00:00 c

at4000-i9k91s-mz.122-25.EWA4.bin

14237928 bytes available (13025048 bytes used)

show slavebootflash:

-#- ED ----type---- --crc--- -seek-- nlen -length- ---------date/time--------- n

ame

1   .. image        93B32579  C2A9FC   30 12495228 Feb 9 2006 22:40:35 +00:00 ca

t4000-i9s-mz.122-25.EWA4.bin

2   .. config       BE3AC713  C2B0D4    6     1622 Aug 5 2008 00:15:00 +00:00 st

att\

14765868 bytes available (12497108 bytes used)

CSCO10992439 Sun, 02/07/2010 - 00:27

Hi,

I have just run the reverse telnet procedure, it was unsuccessful, I go the following message

% Connection refused by remote host

Any ideas please?
CSCO10992439 Sun, 02/07/2010 - 00:50

this is what Im getting when booting from the secondary SUP

Press RETURN to get started!

00:00:02: %C4K_REDUNDANCY-6-INIT: Initializing as ACTIVE supervisor

00:00:22: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan

00:00:23: %C4K_IOSMODPORTMAN-6-MODULEONLINE: Module 2 (WS-X4013+ S/N: JAE1004UBAS Hw: 4.1) is online

00:00:30: %SYS-5-CONFIG_I: Configured from memory by console

00:00:31: %SYS-5-RESTART: System restarted --

Cisco IOS Software, Catalyst 4000 L3 Switch Software (cat4000-I9S-M), Version 12.2(25)EWA4, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2005 by Cisco Systems, Inc.

Compiled Fri 23-Sep-05 13:31 by ssearch

and also I cant type anything into the console....
Pavlo Bykov Sun, 02/07/2010 - 13:35

Hi. You can't get that message from a console. That means you are doing something incorrectly.

You might have an authentication method problem on the AUX line, on the router you are remote logging from. Or maybe you forgot to allow login?

Do this on that router (if it's clean running config):

conf t

ena sec cisco

line vty 0 4

pass cisco

login

linex aux 0

pass cisco

login

transport input all

int lo 0

ip add 1.1.1.1 255.255.255.255

end

telnet 1.1.1.1 2017

(the port number for reverse telnet is 2000 + the number that you see from "sh line | in AUX|aux"

Also,

changing configuration register to 0x2102 on the 4507 would be nice

CSCO10992439 Sun, 02/07/2010 - 23:14

Hi,

Thanks for your reply.

I followed your steps exactly, I got this output

Router#telnet 1.1.1.1 2001

Trying 1.1.1.1, 2001 ... Open

User Access Verification

Password:

Password OK

but I cant type anything, everything freezes there.

As for the conf reg, I cant change it, because I cant type anything at all.......

Actions

Login or Register to take actions

This Discussion

Posted January 26, 2010 at 9:12 AM
Stats:
Replies:49 Avg. Rating:
Views:4655 Votes:0
Shares:0

Related Content

Discussions Leaderboard

Rank Username Points
1 15,007
2 8,150
3 7,730
4 7,083
5 6,742
Rank Username Points
150
72
69
65
45