Cisco ISR2900 router PAK license install example

1 背景

Here we got Cisco 2901 router

R-Cisco-2901#sh inventory 
NAME: "CISCO2901/K9", DESCR: "CISCO2901/K9 chassis, Hw Serial#: FOG123444, Hw Revision: 1.0"
PID: CISCO2901/K9      , VID: V06 , SN: FOG123456

We need security license to enable the dmvpn feature, the current license feature is right-to-use, we need to upgrade to permanent

Show version可以查看license类型

------------------------------------------------------------------------
Technology    Technology-package                  Technology-package
              Current              Type           Next reboot  
------------------------------------------------------------------------
ipbase        ipbasek9             Permanent      ipbasek9
security      securityk9           EvalRightToUse securityk9
uc            uck9                 Permanent      uck9
data          None                 None           None

2 Config step

2.1 License Registration

从cisco采购的license文件是PAK码，需要到cisco.com进行注册，和设备的SN进行绑定，生成lic文件。链接：http://www.cisco.com/go/license

下面图片是PAK文件内容，红框内即serial number，需要用到这一串SN到cisco注册。

2.2 License install

可以直接从tftp server进行安装，不需要先拷贝到路由器的flash再进行安装。

R-Cisco-2901-FGS#license install tftp://10.46.14.23/hrbFGL1748208A_20191010032540893.lic
Installing licenses from "tftp://10.46.14.23/hrbFGL1748208A_20191010032540893.lic" 

Loading hrbFGL1748208A_20191010032540893.lic from 10.46.14.23 (via GigabitEthernet0/1): !
[OK - 1155 bytes]
Installing...Feature:securityk9...Successful:Supported
1/1 licenses were successfully installed 
0/1 licenses were existing licenses
0/1 licenses were failed to install

安装成功

安装完成后，立即生效，不需要重启
再次show version查看license status

Router# show version
Technology Package License Information for Module:'c2900' 

------------------------------------------------------------------------
Technology    Technology-package                  Technology-package
              Current              Type           Next reboot  
------------------------------------------------------------------------
ipbase        ipbasek9             Permanent      ipbasek9
security      securityk9           Permanent      securityk9
uc            uck9                 Permanent      uck9
data          None                 None           None
Configuration register is 0x2102