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Cisco 4402/4404 code upgrade

Answered Question
Sep 20th, 2014
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Hi Experts,

I am about to upgrade the code of Cisco 4402/4404 WLC.  The existing code is 5.1.151.0 and I have to upgrade to code to 7.0.250.0.

The upgrade path will be 5.1.151.0 to 5.2.193.0 and then to 7.0.250.0.  My question is regarding the memory.  Will there be no problem when I do the code upgrade?   I asked the customer to get the 'sh memory statistics' and below is the output.

RUHHQR15WC03) >show memory statistics

System Memory Statistics:

Total System Memory............: 528969728 bytes

Used System Memory.............: 220655616 bytes

Free System Memory.............: 308314112 bytes

Bytes alloced from RTOS........: 90346464 bytes

Chunks Free....................: 78 bytes

Number of mmapped regins.......: 34

Total space in mmaped regions..: 49537024 bytes

Total allocated space..........: 90114336 bytes

Total non-inuse space..........: 232128 bytes

Top-most releasable space......: 132120 bytes

Total allocated (incl mmap)....: 139883488 bytes

Total used (incl mmap).........: 139651360 bytes

Total free (incl mmap).........: 232128 bytes

 

 

(RUHHQR15WC04) >show memory statistics

System Memory Statistics:

Total System Memory............: 528969728 bytes

Used System Memory.............: 219095040 bytes

Free System Memory.............: 309874688 bytes

Bytes alloced from RTOS........: 88789984 bytes

Chunks Free....................: 30 bytes

Number of mmapped regins.......: 35

Total space in mmaped regions..: 49745920 bytes

Total allocated space..........: 88592432 bytes

Total non-inuse space..........: 197552 bytes

Top-most releasable space......: 132344 bytes

Total allocated (incl mmap)....: 138535904 bytes

Total used (incl mmap).........: 138338352 bytes

Total free (incl mmap).........: 197552 bytes

 

Regards,

Correct Answer by Leo Laohoo about 2 years 11 months ago

Let me put it this way ... The memory and the CPU of a WLC 440X is "well behaved".  I wouldn't have any doubt about what the memory/CPU is right now.  Even with a full complement of APs, the appliance can handle the upgrade just about fine. 

 

Make sure you upgrade the bootstrap.

Correct Answer by Vinod Arya about 2 years 11 months ago

Yes the upgrade path is to upgrade to a 5.2 or a 6.0 release and then upgrade to 7.0.250.0.

For more details you can refer the Release notes for 7.0.250.0.

-Thanks

Vinod

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Overall Rating: 5 (2 ratings)
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Leo Laohoo Sun, 09/21/2014 - 03:36
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The main thing to consider is also upgrade the bootstrap.  

 

Otherwise, you should be fine.

mcaoile Sun, 09/21/2014 - 05:04
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Leo,

 

I suppose there is no issue regarding available memory?

 

 

Regards,

Correct Answer
Leo Laohoo Sun, 09/21/2014 - 05:12
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Let me put it this way ... The memory and the CPU of a WLC 440X is "well behaved".  I wouldn't have any doubt about what the memory/CPU is right now.  Even with a full complement of APs, the appliance can handle the upgrade just about fine. 

 

Make sure you upgrade the bootstrap.

mcaoile Sun, 09/21/2014 - 05:26
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Leo,

 

Thanks a lot.  I'll also upgrade the bootstrap.

 

 

Regards,

mcaoile Sun, 09/21/2014 - 06:47
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Leo,

 

Since I will be upgrading to an intermediate release, do I have to wait for all APs to be upgraded (intermediate release) then do the 7.0.250.0 upgrade.

 

 

Regards,

Scott Fella Sun, 09/21/2014 - 08:57
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There are other things to consider prior to upgrading. Make sure your AP's are supported on the code you will eventually go with and make sure your client devices have the latest drivers. This has been an issue and will cause you issues if you don't address this prior to the upgrade. For example, the Intel 6200 wireless cards don't work with v14 and require later v15 or v16 to function. There have been others who went back to v7.0.240.0 because some devices didn't work well on v7.0.250.0. You need to test and it's just not making sure it connects but to make sure the device doesn't loose connectivity every so often. If your devices have the latest drivers, mainly laptops, then you should be okay. 

Scott

Leo Laohoo Sun, 09/21/2014 - 22:06
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Here's my opinion:  Disable the AP-Manager interface of the WLC.   This will stop the AP from talking to the WLC.  Upgrade the WLC accordingly.  This will also stop the AP from joining/upgrading themselves.  Wait until you've finalized the upgrade do you re-enable the AP-Manager interface.

mcaoile Sun, 09/21/2014 - 22:18
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Leo,

 

Got another question, if in case I face a problem with the 7.0.250.0 code and I rollback/downgrade the code, which code version do you suggest I install. 

 

 

Regards,

Correct Answer
Vinod Arya Sun, 09/21/2014 - 04:26
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Yes the upgrade path is to upgrade to a 5.2 or a 6.0 release and then upgrade to 7.0.250.0.

For more details you can refer the Release notes for 7.0.250.0.

-Thanks

Vinod

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