Mikrotik - VPN links

http://wiki.mikrotik.com/wiki/Tunnels

--- dual ipsec
http://forum.mikrotik.com/viewtopic.php?t=11174 

--- avaliar
https://supportforums.cisco.com/discussion/11851686/cisco-mikrotik-site-site-ipsec-tunnel


--- mikrotik não é um bom concentrador vpn ipsec...
--- não trabalha  bem em hub-spoke pois nao aceita corretamente diversos peer com endereço IP dinamico.

http://forum.mikrotik.com/viewtopic.php?t=7021

--- um bom exemplo documentacao vpn
http://www.yamaha.com/products/en/network/settings/mikrotik_ipsec_aggressive/


--- vpn cisco com mikrotik
https://supportforums.cisco.com/discussion/11851686/cisco-mikrotik-site-site-ipsec-tunnel


--- wiki IPSEC pre-shared-key-xauth
http://forum.mikrotik.com/viewtopic.php?t=76481

--- link bem suscinto
http://techtmblog.blogspot.com.br/2014/11/internet-protocol-security-ipsec-on.html