Attempting to trunk a 2924xl to a 3550

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Apr 2nd, 2010
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I have a 3550 and 2924xl switch I want to trunk together but am unsuccefule thus far:


The 3550 is as follows:

Model number: WS-C3550-24-EMI

System image file is "flash:c3550-i5q3l2-mz.121-14.EA1a/c3550-i5q3l2-mz.121-14.EA1a.bin

cisco WS-C3550-24 (PowerPC) processor (revision K0) with 65526K/8192K bytes of memory.


The 2924 is as follows:

Model number: WS-C2924-XL-A

System image file is "flash:c2900XL-h2-mz-112.8.2-SA6.bin", booted via administrator on vty0 (172.16.204.213)

cisco WS-C2924-XL (PowerPC403GA) processor (revision 0x11) with 8192K/1024K bytes of memory.


With the 2924XL access port set to access, I can access it. Setup in multi mode with vlans permitted from the 3550, I cannot.


My objective is to offload a Nortel switch currenlty trunked from my 3550 and shit the hosts on the Nortel to the 2924 XL on a similarly trunked port.


Is what I am attempting even possible with these two versions of Catalysts?

Correct Answer by Leo Laohoo about 7 years 3 weeks ago

If your troubles have been addressed, may I request if you can mark this post as "Answered" and rate our posts?  Thank you very much.

Correct Answer by glen.grant about 7 years 3 weeks ago

  You can get rid of the diag image , its just there for factory troubleshooting and has no function in everyday usage .  Use the 12.X image . It is the right image for the box , just verify the size in flash matches the size of the file you downloaded from CCO.   Then make sure you do the boot statement , "boot system flash:c2900xl-c3h2s-mz.120-5.WC17.bin .  Write mem the config and reload .   For your trunk setup make sure both are using dot1q for the encapsulation ,  early versions of the 2924 used ISL as a default I believe.

Correct Answer by Leo Laohoo about 7 years 3 weeks ago

The 2900Xl will only allow ONE IOS.  There's not enough flash space for two.

Correct Answer by jjalexander401 about 7 years 3 weeks ago

Yes, that's the image mine had on it.

System image file is "flash:c2900xl-c3h2s-mz.120-5.WC17.bin"


If you have console access, I'd just set up a tftp server on your laptop and grab the new image from there.  You'll probably have to delete the current image from flash before doing so due to space restrictions.

Correct Answer by Leo Laohoo about 7 years 3 weeks ago

"no such file or directory"

The file "c2900XL-h2-mz-112.8.2-SA6.bin" is missing.  Do the following at the "switch:" prompt:

1.  flash_init
2.  load_helper
3.  dir flash:

You should see a file with a .bin filename.  If you do, type the command "boot .bin".

When you have successfully loaded the IOS, go into configuration mode and type the following command "no boo system" and save the config. 

I am suspecting that you have loaded a new IOS but forgot to change the boot parameters.

Correct Answer by Leo Laohoo about 7 years 4 weeks ago

Can you post the configuration of VLAN 302 of both 2900 and 3550?


Try the following commands on the trunk links for both switches:


switchport mode trunk
switchport trunk encap dot1q
switchport trunk allowed vlan 1,300,302,303,396-398


Get rid of the storm control statement on a trunk link.  Put the this statement on access ports.


Can you also post the output of the "sh ip int brief" on the 2900?  Maybe you have multiple VLANs and, because the 2900 will only allow ONE active VLAN, VLAN 302 is shutdown in favour of other VLAN.

Correct Answer by Giuseppe Larosa about 7 years 4 weeks ago

Hello Acameron12,

do you see that the list of permitted vlans is different on the two sides?


>>switchport multi vlan  1,300,302,303,396-398


>> switchport trunk allowed vlan  300,302,303,396-398


on C3550 do:


int fas0/4

switchport trunk allowed vlan add 1


Hope to help

Giuseppe

Correct Answer by Giuseppe Larosa about 7 years 4 weeks ago

Hello Acameron12,


the key message is:


>> Received 802.1Q BPDU on  non 802.1Q trunk FastEthernet0/24 on vlan 300.


the C2924XL may be supporting only ISL trunks, try to use encapsulation isl on the C3550 side


as noted in first post

sh interface fas0/24 switchport should confirm this.


some of older low end switches support only ISL, other ones like C2950 support only 802.1Q


Hope to help

Giuseppe

Correct Answer by Giuseppe Larosa about 7 years 4 weeks ago

Hello Acameron12,


>> With the 2924XL access port set to  access, I can access it. Setup in multi mode with vlans permitted from  the 3550, I cannot.


this does not mean that the two devices are not building a trunk correctly but it may mean there is a problem with the vlan where the management interface of 2924XL exists.


you should take on both devices (if you can reach the C2924XL with a console connection)


sh interface type 0/y switchport


where type 0/y stands for the port name for example fas 0/23


in this way it is possible to see some of the trunk parameters including encapsulation protocol and native vlan settings


Connecting two ports configured as access ports may solve a native vlan mismatch, or it can join two different broadcast domains

Once a trunk is setup frames sent to C2924 XL management IP address are tagged with a vlan number that may be different from that expected on the C2924 XL making it unreachable.


Hope to help

Giuseppe

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Correct Answer
Giuseppe Larosa Fri, 04/02/2010 - 12:03
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Hello Acameron12,


>> With the 2924XL access port set to  access, I can access it. Setup in multi mode with vlans permitted from  the 3550, I cannot.


this does not mean that the two devices are not building a trunk correctly but it may mean there is a problem with the vlan where the management interface of 2924XL exists.


you should take on both devices (if you can reach the C2924XL with a console connection)


sh interface type 0/y switchport


where type 0/y stands for the port name for example fas 0/23


in this way it is possible to see some of the trunk parameters including encapsulation protocol and native vlan settings


Connecting two ports configured as access ports may solve a native vlan mismatch, or it can join two different broadcast domains

Once a trunk is setup frames sent to C2924 XL management IP address are tagged with a vlan number that may be different from that expected on the C2924 XL making it unreachable.


Hope to help

Giuseppe

acameron12 Fri, 04/02/2010 - 12:39
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I do have console access to the 2924 to make configuration changes and IP access to the 3550.

To clarify, I made the following updates to my 2924:


interface FastEthernet0/24                                                     
switchport multi vlan 1,300,302,303,396-398                                   
switchport mode multi


On my 3550:


interface FastEthernet0/4
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 300,302,303,396-398
switchport mode trunk
storm-control broadcast level 1.00


When I set the 3550 side of the connection, my 2924 reports:


%SPANTREE-2-RECV_1Q_NON_1QTRUNK:                                               
Received 802.1Q BPDU on non 802.1Q trunk FastEthernet0/24 on vlan 1.           
%SPANTREE-2-BLOCK_PORT_TYPE: Blocking FastEthernet0/24 on vlan 1.              
Inconsistent port type.                                                        
%SPANTREE-2-BLOCK_PVID_PEER: Blocking FastEthernet0/24 on vlan 302.            
Inconsistent peer vlan.                                                        
%SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/24 on vlan 1.             
Inconsistent local vlan.                                                       
%SPANTREE-2-RECV_1Q_NON_1QTRUNK:                                               
Received 802.1Q BPDU on non 802.1Q trunk FastEthernet0/24 on vlan 300.         
%SPANTREE-2-BLOCK_PORT_TYPE: Blocking FastEthernet0/24 on vlan 300.            
Inconsistent port type.                                                        
%SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/24 on vlan 300.           
Inconsistent local vlan.                                                       
%SPANTREE-2-BLOCK_PORT_TYPE: Blocking FastEthernet0/24 on vlan 302.            
Inconsistent port type.                                                        
%SPANTREE-2-RECV_1Q_NON_1QTRUNK:                                               
Received 802.1Q BPDU on non 802.1Q trunk FastEthernet0/24 on vlan 303.         
%SPANTREE-2-BLOCK_PORT_TYPE: Blocking FastEthernet0/24 on vlan 303.            
Inconsistent port type.                                                        
%SPANTREE-2-BLOCK_.PVID_LOCAL: Blocking FastEthernet0/24 on vlan 303.          
Inconsistent local vlan.                                                       
%SPANTREE-2-RECV_1Q_NON_1QTRUNK:                                               
Received 802.1Q BPDU on non 802.1Q trunk FastEthernet0/24 on vlan 396.         
%SPANTREE-2-BLOCK_PORT_TYPE: Blocking FastEthernet0/24 on vlan 396.            
Inconsistent port type.                                                        
%SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/24 on vlan 396.           
Inconsistent local vlan.                                                       
%SPANTREE-2-RECV_1Q_NON_1QTRUNK:                                               
Received 802.1Q BPDU on non 802.1Q trunk FastEthernet0/24 on vlan 397.         
%SPANTREE-2-BLOCK_PORT_TYPE: Blocking FastEthernet0/24 on vlan 397.            
Inconsistent port type.                                                        
%SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/24 on vlan 397.           
Inconsistent local vlan.                                                       
%SPANTREE-2-RECV_1Q_NON_1QTRUNK:                                               
Received 802.1Q BPDU on non 802.1Q trunk FastEthernet0/24 on vlan 398.         
%SPANTREE-2-BLOCK_PORT_TYPE: Blocking FastEthernet0/24 on vlan 398.            
Inconsistent port type.                                                        
%SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/24 on vlan 398.           
Inconsistent local vlan.....

Correct Answer
Giuseppe Larosa Fri, 04/02/2010 - 13:30
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Hello Acameron12,


the key message is:


>> Received 802.1Q BPDU on  non 802.1Q trunk FastEthernet0/24 on vlan 300.


the C2924XL may be supporting only ISL trunks, try to use encapsulation isl on the C3550 side


as noted in first post

sh interface fas0/24 switchport should confirm this.


some of older low end switches support only ISL, other ones like C2950 support only 802.1Q


Hope to help

Giuseppe

acameron12 Fri, 04/02/2010 - 13:55
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I set the 2924 as:


interface FastEthernet0/24                                                     
switchport multi vlan 1,300,302,303,396-398                                   
switchport mode multi



I set my 3550 as:

interface FastEthernet0/4
switchport trunk encapsulation isl
switchport trunk allowed vlan 300,302,303,396-398
switchport mode trunk

storm-control broadcast level 1.00

Still no luck.

Although the 2924 reported no errors.

I can ping my local vlan interface on 2924, but cannot ping across to the 3550.

Correct Answer
Giuseppe Larosa Fri, 04/02/2010 - 14:05
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Hello Acameron12,

do you see that the list of permitted vlans is different on the two sides?


>>switchport multi vlan  1,300,302,303,396-398


>> switchport trunk allowed vlan  300,302,303,396-398


on C3550 do:


int fas0/4

switchport trunk allowed vlan add 1


Hope to help

Giuseppe

acameron12 Fri, 04/02/2010 - 16:51
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Hello Guiseppe,

          I updated the 3550 side as suggested:



!
interface FastEthernet0/4
switchport trunk encapsulation isl
switchport trunk allowed vlan 1,300,302,303,396-398
switchport mode trunk
storm-control broadcast level 1.00



Still no response frmo the 2924 on a ping request to the VLAN 302 interface:


ping 172.16.200.188


Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.200.188, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

Correct Answer
Leo Laohoo Fri, 04/02/2010 - 20:20
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Can you post the configuration of VLAN 302 of both 2900 and 3550?


Try the following commands on the trunk links for both switches:


switchport mode trunk
switchport trunk encap dot1q
switchport trunk allowed vlan 1,300,302,303,396-398


Get rid of the storm control statement on a trunk link.  Put the this statement on access ports.


Can you also post the output of the "sh ip int brief" on the 2900?  Maybe you have multiple VLANs and, because the 2900 will only allow ONE active VLAN, VLAN 302 is shutdown in favour of other VLAN.

acameron12 Mon, 04/05/2010 - 06:09
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My 3550 port definition presently looks as follows:


interface FastEthernet0/4
switchport trunk encapsulation isl
switchport trunk allowed vlan 1,300,302,303,396-398
switchport mode trunk

Still no access to the address of the 2924 (172.16.200.188) from the 3550 or in the other direction to the 3550's VLAN 302 interface (172.16.200.129). Although I can still pnig the 2924's local port from the console.

acameron12 Mon, 04/05/2010 - 06:19
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See below:


BDC-UNI-INF-SW-G>sh ip int brief

Interface IP-Address OK? Method Status Protocol

VLAN1 unassigned YES unset up up

VLAN302 172.16.200.188 YES NVRAM up up

FastEthernet0/1 unassigned YES unset down down

FastEthernet0/2 unassigned YES unset down down

FastEthernet0/3 unassigned YES unset down down

FastEthernet0/4 unassigned YES unset down down

FastEthernet0/5 unassigned YES unset down down

FastEthernet0/6 unassigned YES unset down down

FastEthernet0/7 unassigned YES unset down down

FastEthernet0/8 unassigned YES unset down down

FastEthernet0/9 unassigned YES unset down down

FastEthernet0/10 unassigned YES unset down down

FastEthernet0/11 unassigned YES unset down down

FastEthernet0/12 unassigned YES unset down down

FastEthernet0/13 unassigned YES unset down down

FastEthernet0/14 unassigned YES unset down down

FastEthernet0/15 unassigned YES unset down down

FastEthernet0/16 unassigned YES unset down down

FastEthernet0/17 unassigned YES unset down down

FastEthernet0/18 unassigned YES unset down down

FastEthernet0/19 unassigned YES unset down down

FastEthernet0/20 unassigned YES unset down down

FastEthernet0/21 unassigned YES unset down down

FastEthernet0/22 unassigned YES unset down down

FastEthernet0/23 unassigned YES unset down down

FastEthernet0/24 unassigned YES unset up up

BDC-UNI-INF-SW-G>

jjalexander401 Sun, 04/04/2010 - 18:25
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I  recently set up a trunk between a 2924xl and 2950.  here is my sample config:


2950:

interface FastEthernet0/24
description dot1q trunk link to Lamson (S2 2924) on port fa0/23
switchport trunk native vlan 70
switchport trunk allowed vlan 10,20,30,70
switchport mode trunk


2924:

interface FastEthernet0/23
description dot1q trunk link to Rio (S1 2950) on port fa0/24
switchport trunk encapsulation dot1q
switchport trunk native vlan 70
switchport trunk allowed vlan 1,10,20,30,70,1002-1005
switchport mode trunk


The 2924 automatically adds 1 and 1002-1005 vlans as allowed.  I couldn't remove them.  I also had to declare vlan 70 as management on the 2924xl, by going to the interface and typing 'management'


hope that helps.

glen.grant Mon, 04/05/2010 - 04:31
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   Follow jjalexander's config.  Switchport multi setup is not the same as a normal trunk .  It was something cisco used early on on the 2924's to  try and runn mutliple vlans  before  trunking became a standard . If your switch won't take the normal trunking configs then you may have to upgrade the code to 12.X code .   I know the 3550 does not support multi vlan mode.


http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst2900xl_3500xl/release12.0_5_wc5/swg/swvlan.html#wp1030092

acameron12 Mon, 04/05/2010 - 06:31
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I was worried about that when I embarked on this task. I have a copy of the image:

c2900xl-c3h2s-mz.120-5.WC17.bin

Which I downloaded just in case.


I will revert to the original configuration via access rather than trunking from the 3550 and retry subsequent to an image upgrade.


Thanks for the insights.

acameron12 Mon, 04/05/2010 - 06:57
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I attempted a reload with a new image, but failed.


Xmodem file system is available.                                               
Initializing Flash...                                                          
flashfs[0]: 173 files, 4 directories                                           
flashfs[0]: 0 orphaned files, 0 orphaned directories                           
flashfs[0]: Total bytes: 3612672                                               
flashfs[0]: Bytes used: 3528704                                                
flashfs[0]: Bytes available: 83968                                             
flashfs[0]: flashfs fsck took 8 seconds.                                       
...done Initializing Flash.                                                    
Boot Sector Filesystem (bs:) installed, fsid: 3                                
Parameter Block Filesystem (pb:) installed, fsid: 4                            
Loading "flash:c2900XL-h2-mz-112.8.2-SA6.bin"...flash:c2900XL-h2-mz-112.8.2-SA6.
bin: no such file or directory                                                 
                                                                               
Error loading "flash:c2900XL-h2-mz-112.8.2-SA6.bin"                            
                                                                               
Interrupt within 5 seconds to abort boot process.                              
Boot process failed...                                                         
                                                                               
The system is unable to boot automatically.  The BOOT                          
environment variable needs to be set to a bootable                             
image.                                                                         
                                                                               
switch:



Perhasps I have exceeded the capabilities of this 2924 switch given the environment (paired with a 3550)?

Correct Answer
Leo Laohoo Mon, 04/05/2010 - 14:52
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"no such file or directory"

The file "c2900XL-h2-mz-112.8.2-SA6.bin" is missing.  Do the following at the "switch:" prompt:

1.  flash_init
2.  load_helper
3.  dir flash:

You should see a file with a .bin filename.  If you do, type the command "boot .bin".

When you have successfully loaded the IOS, go into configuration mode and type the following command "no boo system" and save the config. 

I am suspecting that you have loaded a new IOS but forgot to change the boot parameters.

acameron12 Mon, 04/05/2010 - 16:14
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Should I still be able to upgrade to c2900xl-c3h2s-mz.120-5.WC17.bin image and enable compatible trunking functions?

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jjalexander401 Mon, 04/05/2010 - 16:33
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Yes, that's the image mine had on it.

System image file is "flash:c2900xl-c3h2s-mz.120-5.WC17.bin"


If you have console access, I'd just set up a tftp server on your laptop and grab the new image from there.  You'll probably have to delete the current image from flash before doing so due to space restrictions.

acameron12 Mon, 04/05/2010 - 17:42
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Ok, I will try the procedure again with your recommendations. I had used tftp to load the new 12.0 image to the 2924. I renamed the existing 11.x image with a .old extension to force a load of the 12.x.

acameron12 Tue, 04/06/2010 - 07:07
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I tried the attempted procedure, but:


switch: flash_init                                                             
Initializing Flash...                                                          
...The flash is already initialized.                                           
switch: load_helper                                                            
switch: load_helper                                                            
switch:                                                                        
switch:         dir flash:                                                     
Directory of flash:/                                                           
                                                                               
2    -rwx  1109398                  c2900XL-h2-mz-112.8.2-SA6.old        
3    -rwx  98833                    c2900XL-diag-mz-112.8.2-SA6          
4    drwx  10816                    html                                 
175  -rwx  1395                     config.text                          
177  -rwx  1811903                  c2900xl-c3h2s-mz.120-5.WC17.bin      
178  -rwx  323                      env_vars                             
                                                                               
83968 bytes available (3528704 bytes used)                                     
switch: boot c2900xl-c3h2s-mz.120-5.WC17.bin                                   
Loading "c2900xl-c3h2s-mz.120-5.WC17.bin"...c2900xl-c3h2s-mz.120-5.WC17.bin: per
mission denied                                                                 
                                                                               
Error loading "c2900xl-c3h2s-mz.120-5.WC17.bin"                                
                                                                               
Interrupt within 5 seconds to abort boot process.             

Boot process failed...                                                         
switch:
               

Leo Laohoo Tue, 04/06/2010 - 17:00
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This is unbelievable!  How were you able to load TWO IOS into a 2900XL???  It couldn't be done.


Unfortunately, you are in ROMmon and it will be difficult to delete the old IOS.  I would have to recommend you FORMAT the flash and upload the "c2900xl-c3h2s-mz.120-5.WC17.bin" again.


You will need to use the command "formate flash:" to do so.

acameron12 Wed, 04/07/2010 - 00:35
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What is the c2900XL-diag-mz-112.8.2-SA6 image and do I need to update that?

Leo Laohoo Wed, 04/07/2010 - 00:52
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c2900XL-diag-mz-112.8.2-SA6 is a very, very old IOS.

acameron12 Wed, 04/07/2010 - 01:36
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mmm, ok.

Would it make sense to just tftp the old 11.x images off the switch, delete them, leave the 12.x then re-boot?

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Leo Laohoo Wed, 04/07/2010 - 02:14
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The 2900Xl will only allow ONE IOS.  There's not enough flash space for two.

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glen.grant Wed, 04/07/2010 - 05:23
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  You can get rid of the diag image , its just there for factory troubleshooting and has no function in everyday usage .  Use the 12.X image . It is the right image for the box , just verify the size in flash matches the size of the file you downloaded from CCO.   Then make sure you do the boot statement , "boot system flash:c2900xl-c3h2s-mz.120-5.WC17.bin .  Write mem the config and reload .   For your trunk setup make sure both are using dot1q for the encapsulation ,  early versions of the 2924 used ISL as a default I believe.

acameron12 Thu, 04/08/2010 - 07:02
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Thanks!

I am making progress:


sh ver                                                        
Cisco Internetwork Operating System Software                                   
IOS (tm) C2900XL Software (C2900XL-C3H2S-M), Version 12.0(5)WC17, RELEASE SOFTWARE (fc1)                                                                       
Copyright (c) 1986-2007 by cisco Systems, Inc.                                 
Compiled Tue 13-Feb-07 15:27 by antonino                                       
Image text-base: 0x00003000, data-base: 0x00352924                             
                                                                               
ROM: Bootstrap program is C2900XL boot loader                                  
                                                                               
BDC-UNI-INF-SW-G uptime is 14 minutes                                          
System returned to ROM by reload                                               
System image file is "flash:c2900xl-c3h2s-mz.120-5.WC17.bin"     



An the switch now offers trunking options:


(config-if)#switchport ?                                       
  access    Set access mode characteristics of the interface                   
  mode      Set trunking mode of the interface                                 
  multi     Set characteristics when in multi-VLAN mode                        
  priority  Set 802.1p priorities                                              
  trunk     Set trunking characteristics of the interface                      
  voice     Voice appliance attributes                           



(config-if)#switchport trunk ?                                 
  allowed        Set allowed VLAN characteristics when interface is in trunking
                 mode                                                          
  encapsulation  Set trunking encapsulation when interface is in trunking mode 
  native         Set trunking native characteristics when interface is in      
                 trunking mode                                                 
  pruning        Set pruning VLAN characteristics when interface is in trunking
                 mode                                                          
                             
                                                               

acameron12 Thu, 04/08/2010 - 08:34
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As of this writing, I have successfully re-applied the original trunking commands to my 2924 and 3550.

I am now able to access the IP address of my 2924 through the 3550 and the trunk access.

The two original 11.x images were removed from the 2924 and the 12.x image remaining in flash with

the boot system command applied to point definitively to the new image.

I have executed several reloads to verify the 2924 can recover access.


Thanks all for your insights and suggestions.

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Leo Laohoo Thu, 04/08/2010 - 15:39
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If your troubles have been addressed, may I request if you can mark this post as "Answered" and rate our posts?  Thank you very much.

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