For pritunl-link the access key would be set on the pritunl-link client using the command shown in that documentation. The key in the Pritunl web console is for the route advertisements on VPN servers. The Pritunl server does not function as a link client. Every link must have at least two locations and one host in each location. The pritunl-link client should not be run on the same instance as a Pritunl server.
having followed Site-to-Site with IPsec
and modifying it a tad to match my needs, I am unable to route traffic over the pritunl-link.
When I was creating the pritunl-link it automatically created peer unlike in the document and when I deleted it and tested the “ipsec statusall” there was no peer so I added it back in and it now has a state of interlink latency disconnected and there are nothing in /var/logs for pritunl-link.
How can I get traffic from my vpn client to the poc-next-pritunl-link subnet?
That configuration should not have cloud advertised enabled for the virtual network. The routes are using NAT and the virtual network is not available to the link.
Verify the firewalls are configured correctly on each VPC to accept traffic from the other VPC.