关于控制器的license，可以参考对应平台的Datasheet：
- Cisco 2504 WLC
- Cisco 3504 WLC
- Cisco 5508 WLC
- Cisco 5520 WLC
- Cisco Flex 7510 WLC
- Cisco 8540 WLC
- Cisco Virtual WLC
其他文档：
- Special Notes for Licensed Data Payload Encryption on Cisco Wireless Controllers
- Smart Licensing Deployment Guide
1、license类型和状态
- license type (permanent, evaluation, or extension)
- The status of the license (in use, not in use, inactive, or EULA not accepted)
2、安装license
在GUI界面选择Management > Software Activation > Commands ，选择Install License。
注意tftp-url: tftp://server_ip/path/filename
e.g：tftp://10.0.0.1/cmm/standard.lic
end-user license agreement (EULA)需要Accept ！
至于保存所有安装的license的备份，通过如下操作完成：
然后重启WLC
如果通过CLI去安装license：
- license install url <<<< tftp://server_ip /path /filename 如果需要移除license文件，使用命令：license clear license_name
-
license comment {add | delete} license_name comment_string
-
license save url
- reset system
eg:
(Test-vWLC) >license install tftp://<server ip>/<path>/<filename>
(Test-vWLC) >license comment add <license-name> <string>
(Test-vWLC) >license save tftp://<server ip>/<path>/<filename>
(Test-vWLC) >reset system
The system has unsaved changes.
Would you like to save them now? (y/N)
3、激活评估license
你需要将评估license的优先级别调高，以便激活它。
接着你会被要求接受EULA，你需要选择Accept
之后再查看，你可以看到目前已经是in use状态了。
CLI配置：
确认好license的名字：
(Test-vWLC) >show license all
License Store: Evaluation License Storage
StoreIndex: 0 Feature: base-ap-count Version: 1.0
License Type: Evaluation
License State: Active, In Use
Evaluation total period: 8 weeks 4 days
Evaluation period left: 8 weeks 3 days
Expiry date: Sun Nov 17 20:58:04 2019
License Count: 200 /200 (Active/In-use)
License Priority: High
(Test-vWLC) >license modify priority base-ap-count high
Feature: base-ap-count
Index: 1 License type: Evaluation
Lock type : Not Locked
License Count : 200
License Priority: High
Evaluation licenses are being activated in the device for the following feature(s):
Feature Name: base-ap-count
PLEASE READ THE FOLLOWING TERMS CAREFULLY. INSTALLING THE LICENSE OR
LICENSE KEY PROVIDED FOR ANY CISCO PRODUCT FEATURE OR USING SUCH
PRODUCT FEATURE CONSTITUTES YOUR FULL ACCEPTANCE OF THE FOLLOWING
TERMS. YOU MUST NOT PROCEED FURTHER IF YOU ARE NOT WILLING TO BE BOUND
BY ALL THE TERMS SET FORTH HEREIN.
You hereby acknowledge and agree that the product feature license
is terminable and that the product feature enabled by such license
may be shut down or terminated by Cisco after expiration of the
applicable term of the license (e.g., 30-day trial period). Cisco
reserves the right to terminate or shut down any such product feature
electronically or by any other means available. While alerts or such
messages may be provided, it is your sole responsibility to monitor
your terminable usage of any product feature enabled by the license
and to ensure that your systems and networks are prepared for the shut
down of the product feature. You acknowledge and agree that Cisco will
not have any liability whatsoever for any damages, including, but not
limited to, direct, indirect, special, or consequential damages related
to any product feature being shutdown or terminated. By clicking the
"accept" button or typing "yes" you are indicating you have read and
agree to be bound by all the terms provided herein.
ACCEPT? [y/n]: y
(Test-vWLC) >
然后可以reset system ！
4、Smart license
思科启动了通过构建思科智能软件管理器门户来简化客户许可管理的计划。它可以帮助客户了解他们购买的许可证以及他们使用的许可证。 其他各种思科产品已经启用Smart Enabled，随着此版本的推出，Smart Licensing现在将在以下平台上提供：
-
Cisco 5520 WLC (AIR-CT5520-K9)
-
Cisco 8540 WLC (AIR-CT8540-K9)
-
Cisco vWLC (L-AIR-CTVM-5-K9)
-
Cisco 3504 WLC (AIR-CT3504-K9)
你需要注册你自己的Smart Account ！
如何查看license？
show license capacity
show license summary
show license all
show license detail license_name
show license {expiring | evaluation | permanent | in-use}
排查license的问题：
debug license core {all | errors | events} {enable | disable}
debug license errors {enable | disable}
debug license events {enable | disable}