Help with routing from site 1 to site 3 (site1==site2==site3)

After setting it up here by locally you don't need the concentrator

Did all site to site with IKEv2 and doable even with dynamic IP by Site-to-site with Dynamic Peer

site A ping from 192.168.254.134 to site C 192.168.255.52

Site A USG60W

WAN2 dynamic IP

LAN1 192.168.254.129/255.255.255.128

VPN gateway to site B 192.168.254.1

VPN connection site-to-site

Nailed-Up

Gwtozywall110_local

local policy 192.168.254.128/26

remote policy 192.168.138.0/28

routing rule

Interface LAN1

destination address 192.168.255.48/28

next hop VPN tunnel

Tuneltozywall110_local

-----------------------------

Site B Zywall 110

OPT 192.168.254.1

VPN gateway to site A Dynamic Address

VPN connection Site-to-site with Dynamic Peer

GwtoUSG60W_local

local policy 192.168.138.0/28

remote policy 192.168.254.128/26

VPN gateway to site C 192.168.255.247

VPN connection Site-to-site

GWtoVPN300_local2

local policy 192.168.138.0/28

remote policy 192.168.255.48/28

routing rule

Tunnel TuneltoUSG60W_local

destination address 192.168.255.48/28

next hop VPN tunnel

TuneltoVPN300_local2

-----------------------------------

Site C VPN300

Ge3 192.168.255.247

Ge5 192.168.255.48  /  255.255.255.240

VPN gateway to site B 192.168.255.202

VPN connection Site-to-site

GWtozywall110_local2

local policy 192.168.255.48/28

remote policy 192.168.138.0/28

routing rule

Interface Ge5

destination address 192.168.254.128/26

next hop VPN tunnel

GWtozywall110_local2