Добрый день!
Настраиваю VPN tunnel site-to-site на основе
http://system-administrators.info/?p=5588
с учетом того что у меня 2901(IOS)
Сразу остановился на crypto isakmp enable _outside_ не принимает параметр outside. И совсем не понимает tunnel group х.х.х.х type ipsec-l2l  - Ограничение лицензии?

Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.1(4)M4, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Tue 20-Mar-12 18:57 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M15, RELEASE SOFTWARE (fc1)
...
Cisco CISCO2901/K9 (revision 1.0) with 487424K/36864K bytes of memory.
Processor board ID FCZ1641C44M
2 Gigabit Ethernet interfaces
1 terminal line
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash 0 (Read/Write)