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Cisco Switch - spanning tree command

Posted on 2006-07-24
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Last Modified: 2008-01-09
I have two of the same switches
Cisco Catalayst 2950

One of them takes the following commands, while the other one doesn't

spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id

I get the following error on switch 2, which is supposed to work as the backup for switch1

Switch2(config)#spanning-tree mode pvst
                                               ^
% Invalid input detected at '^' marker.

Please tell me how I can issue the three spanning-tree commands to the second switch.
Thanks,
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Question by:jibranilyas
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Expert Comment

by:RPPreacher
ID: 17168199
Can you do a 'show version' command on both switches?

Please post here.
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Author Comment

by:jibranilyas
ID: 17168365
switch1 is IOS ver 12.1
switch2 is IOS ver 12.0

Switch1:
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(20)EA1a, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Mon 19-Apr-04 20:58 by yenanh
Image text-base: 0x80010000, data-base: 0x805A8000

Switch2:
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-C3H2S-M), Version 12.0(5.3)WC(1), MAINTENANCE INTERIM SOFTWARE
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Mon 30-Apr-01 07:56 by devgoyal
Image text-base: 0x80010000, data-base: 0x8031A000

So, upgrading is the only way out?
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Accepted Solution

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RPPreacher earned 2000 total points
ID: 17168399
Different versions of IOS have different feature sets available.

Upgrading IOS is very, very easy.

To determine the version of IOS that you need for a specific feature refer to the Feature Navigator
http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp

To download the current IOS use the Upgrade Planner
http://www.cisco.com/cgi-bin/Software/Iosplanner/Planner-tool/iosplanner.cgi
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LVL 20

Expert Comment

by:RPPreacher
ID: 17168450
The Cisco Network Assistant is a very intuitive GUI for upgrading your model of switch.  Point and click.

http://www.cisco.com/en/US/customer/products/ps5931/products_getting_started_guide_chapter09186a00802b7d9d.html
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Author Comment

by:jibranilyas
ID: 17168934
thanks guys,

Here is what i did

Step1 - loaded tftp server on my machine
Step2 - copied the flash image of switch1 on tftp server

Step 3 - logged in to switch 2
Step 4 - pulled the flashimage of switch1 from tftp server (Step 2)

now, i want to use the new image (c2950-i6q4l2-mz.121-20.EA1a.bin) on my switch... how do i do that?
Here is the output of "show flash" command

(Directory of flash:/

  2  -rwx     1674921   May 01 2001 01:09:51  c2950-c3h2s-mz.120-5.3.WC.1.bin
  3  -rwx         241   Jan 01 1970 11:01:06  env_vars
  4  drwx       10176   Jan 01 1970 11:01:43  html
  5  -rwx     3036020   Mar 01 1993 12:11:00  c2950-i6q4l2-mz.121-20.EA1a.bin
165  -rwx          25   Mar 01 1993 11:10:09  snmpengineid
166  -rwx        2833   Mar 01 1993 11:10:15  config.text
7741440 bytes total (1740800 bytes free)
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LVL 20

Expert Comment

by:RPPreacher
ID: 17169606
from the command line

switch(config)# boot system flash:c2950-i6q4l2-mz.121-20.EA1a.bin
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Author Comment

by:jibranilyas
ID: 17169950
^ that worked...  
I am all set now

the commands worked on the second switch after the upgrade.

Thank you
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