Routing Publics over an EOIP tunnel

RouterOS General
1

A customer wants us to build an EOIP tunnel from their premises to our NOC.
The customer is 3 hops away from our core router which is a rb1200
The customer also requires a public ip address

So far I have got the eoip tunnel working from the customers rb750 back to our rb1200 encapsulated in a PPTP tunnel also.

CORE ROUTER
At the core, RB1200 I have a spare 87.xxx.xxx.96/29 sitting on the WAN. I have routed this /29 subnet to 10.40.1.2 (ETHER2 ON THE RB750)
On the RB1200, ETHER9 has 10.40.4.1 sitting on it and bridged to the tunnel.

RB750
On the RB750, ETHER2, which has 10.40.1.2 on it, is bridged to the other end of the tunnel.
ETHER1 ON THE RB750 IS 10.11.15.60, ITS GATEWAY IS 10.11.15.1.

When I connect into ETHER2 and open up winbox, I can only see the 1200 and 750. If I put 10.40.4.3 on my laptop, I have an internet connection.
But If I put 87.xxx.xxx.97 on it, I dont.

Is this scenario possible or am I fighting a loosing battle here? :slight_smile:

2

Hello,

“I have routed this /29 subnet to 10.40.1.2” is your first issue as you cant route a public thru a private.

I have several links that do exactly what you are looking to do.
Diagram1.png
notice the physical eth interface that is added to the bridge is the one facing the other end of the tunnel.

this illustration is a working example.

Hope this helps,
Josh

3

Thank you very much, I will give that a go.