IPSec SG135 (9.719-3) vs XGS2100 (SFOS 20.0.0 GA-Build222)

Question

Very nice! 
 I need help setting up an IPsec tunnel between sites, the firewall models are "UTM - SG135, Firmware 9.719-3" and "XGS2100 - Firmware (SFOS 20.0.0 GA-Build222)". We have researched through forums and followed some steps that match the errors and have not been able to solve the problem. Attached are the bugs from both firewalls: SG135: ipsecstatusall var/log/ipsec.log 
 XGS2100: ipsec statusall log/strongswan.log Looking forward to answers, thanks!

LuCar Toni · Answer

Try a RED Tunnel, then you have an interface and can route over the interface. Later, if you migrate UTM, you could move to route based IPsec. 
 https://docs.sophos.com/nsg/sophos-firewall/19.5/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Network/Interfaces/REDInterfaces/HowToArticles/REDCreateSiteToSiteREDTunnel/index.html 
 https://support.sophos.com/support/s/article/KBA-000003075?language=en_US