I am trying to create a VPN between an RB750GL and a wAP ac. Both are running 6.47 version software. I removed all security because the GRE tunnel is not working.
Here's my setup:
RB750GL- 173.x.x.x/29 external static ip, 172.16.17.1/30 routing ip, 192.168.0.0/24 internal network.
wAP ac - 50.x.x.x/30 external static ip, 172.16.17.2/30 routing ip, 192.168.17.0/24 internal network.
GRE Info: (both)
Type: GRE Tunnel
Actual MTU: 1476
Local and remote addresses are correct external ip each side
IPsec Secret: none
Keepalive: 00:00:10, 10
Don't Fragment: no
Clamp TCP MSS: checked
Allow Fast Path: checked
Checking IP/routes shows reachable on both sides.
I can ping the external ip of each router from the other side all day. When I try to ping the other sides routing ip, or any address on the other sides internal network. It pings fine for the first two pings, then everything after is a timeout.
I thought it might be a firewall issue, so I disabled all rules on the firewall on both sides and it still responds to two pings, then everything else is a timeout.
The RB750GL is at the main office and has 5 other working GRE tunnels. The others all are configured with the same settings (other than external and routing ips). The only difference I see with this GRE tunnel is a few link downs on both sides.
What am I missing?