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Remarks Regarding the License of ASR1001 Series Router

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<Major Problem>
The license may disappear after upgrading or downgrading IOS if it is done across version 03.06.00(15.2(2)S) with the ASR1001 Series Router.

<Rppt Cause>
With the ASR1001 Series Router, a version older than 03.06.00(15.2(2)S) uses a different database area for the license management from the version 03.06.00(15.2(2)S) or later.
As a result, if IOS is upgraded or downgraded with crossing 03.06.00(15.2(2)S), a different license database before upgrading or downgrading is used, and the previously used license information may not be reflected.

<Related Information>
The following is reported regarding this problem.

CSCuc27517    ASR1001 : Permanent license disappears after IOS upgrade

In fix of CSCuc27517, a workaround for IOS upgrade problem is deployed.

<Workaround>
For upgrading or downgrading IOS by crossing 03.06.00(15.2(2)S), follow the procedures below to upgrade or downgrade it to avoid this problem.

Workaround when upgrading:
* Upgrading from a version older than 03.06.00(15.2(2)S) to version 03.06.00(15.2(2)S) or later.
When upgrading from a version older than 03.06.00(15.2(2)S) to version 03.06.00(15.2(2)S) or later, follow the procedures below to upgrade:

1. Back up the license
ASR1001#license save file bootflash:<backup file name>

2. Upgrade IOS
ASR1001(config)#no boot system
ASR1001(config)#boot system bootflash:<image file in upgrade destination>
ASR1001(config)#exit
ASR1001#write
ASR1001#reload

3. Install the backed up license
ASR1001#license install bootflash:<backup file name>

4. Reload after saving the settings
ASR1001#write
ASR1001#reload


* Upgrading from a version older than 03.06.00(15.2(2)S) to a later version that includes a fix of CSCuc27517.
When upgrading from a version older than 03.06.00(15.2(2)S) to a later version that includes a fix of CSCuc27517, follow the procedures below to upgrade.

1. Create the license backup named as 1RU_34_36_ENFORCE_LICENSE_MIGRATION in bootflash
ASR1001#license save file bootflash:1RU_34_36_ENFORCE_LICENSE_MIGRATION

2. Upgrade IOS
ASR1001(config)#no boot system
ASR1001(config)#boot system bootflash:<image file in upgrade destination>
ASR1001(config)#exit
ASR1001#write
ASR1001#reload

When upgraded to the version that includes a fix of CSCuc27517, license information saved in bootflash:1RU_34_36_ENFORCE_LICENSE_MIGRATION is automatically installed when booting with the version applied with the fix of CSCuc27517; there is no need to reboot again.
Note that the fix of CSCuc27517 is applied to the later versions including the following.

03.07.03 (15.2(4)S3)
03.08.02 (15.3(1)S2)
03.09.00 (15.3(2)S)


Workaround when downgrading:
* Downgrading from a version including 03.06.00(15.2(2)S) or later to a version older than 03.06.00(15.2(2)S):
When downgrading from a version including 03.06.00(15.2(2)S) or later to a version older than 03.06.00(15.2(2)S), follow the procedures below to downgrade:
1. Back up the license
ASR1001#license save bootflash:<backup file name>
* It is slightly different from a version whose command is 03.06.00 or older.(existence of 'file')

2. Downgrade IOS
ASR1001(config)#no boot system
ASR1001(config)#boot system bootflash:<image file in downgrade destination>
ASR1001(config)#exit
ASR1001#write
ASR1001#reload

3. Install the backed up license
ASR1001#license install file bootflash:<backup file name>
* It is slightly different from a version whose command includes 03.06.00(15.2(2)S) or later.(existence of 'file')

4. Reload after saving the settings
ASR1001#write
ASR1001#reload

Related Information

Original Document: https://supportforums.cisco.com/ja/document/12332601
Author: Ryota Takao
Posted on Oct 22, 2014

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