正如标题所说，

“advsecurity”许可证是否在 Cisco C891F 上启用“crypto isakmp”？

这是显示许可证输出：

Index 1 Feature: advipservices
    Period left: Life time
    License Type: Permanent
    License State: Active, In Use
    License Count: Non-Counted
    License Priority: Medium
Index 2 Feature: advsecurity
Index 3 Feature: ios-ips-update
    Period left: Not Activated
    Period Used: 0  minute  0  second
    License Type: EvalRightToUse
    License State: Not in Use, EULA not accepted
    License Count: Non-Counted
    License Priority: None
Index 4 Feature: MEM-8XX-512U1GB
    Period left: Not Activated
    Period Used: 0  minute  0  second
    License Type: EvalRightToUse
    License State: Not in Use, EULA not accepted
    License Count: Non-Counted
    License Priority: None

这是缩写的显示版本输出：

Cisco IOS Software, C800 Software (C800-UNIVERSALK9-M), Version 15.3(3)M6, 
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2015 by Cisco Systems, Inc.
Compiled Tue 04-Aug-15 05:50 by prod_rel_team

ROM: System Bootstrap, Version 15.4(1r)T1, RELEASE SOFTWARE (fc1)

License Information for 'c800'
  License Level: advipservices   Type: Permanent
  Next reboot license Level: advipservices

我目前无法使用“crypto isakmp”，我相信这是因为没有这个许可证。

“advsecurity”许可证会启用它还是在此硬件上不受支持？

干杯!