Mikrotik overlapping IP subnets on VPN link

As a common topic that needs to be resolved a lot of times I thought it would be good to do a basic write-up  of a basic double NAT configuration to resolve overlapping IP ranges over a link.

The sample scenario would be as depicted below:
Location A and B with duplicate IP ranges (192.168.0.0/24) on both sides and a VPN link between the two on network 172.16.0.0./30

For this example we would assume two random IP's that needs to be reached from either end, these will be 192.168.0.10 and 192.168.0.247

To make the mikrotik commands more descriptive all local networks (LAN A and LAN B) are connected to "ether2" interface and the link between the two routers to the "ether1" interfaces.

Router A:

/ip address
add address=192.168.0.1/24 interface=ether2
add address=172.16.0.1/30 interface=ether1

Router B:

/ip address
add address=192.168.0.1/24 interface=ether2
add address=172.16.0.2/30 interface=ether1

The next step would be to select two unused/free/unrouted IP ranges in the network that can be used at network A & B, for this example 192.168.98.0/24 and 192.168.99.0/24 were selected.

Install a route on router A to route all 192.168.99.0/24 traffic to the gateway address of router B (172.16.0.2)

Router A:

/ip route
add dst-address=192.168.99.0/24 gateway=172.16.0.2

Then install a source NAT rule that changes the source address of the packets from network A to 192.168.98.0/24. Packets will now have that changed source address and be forwarded to router B.

Router A:

/ip firewall nat 
add chain=srcnat src-address=192.168.0.2-192.168.0.254 dst-address=192.168.99.0/24 action=netmap to-addresses=192.168.98.2-192.168.98.254

Netmap is used to ensure there is a 1:1 mapping on the last octet; that way we will know what machine the traffic originated from.
On Router B a route needs to be installed to route the NATed traffic (.98.0/24) back to router A and destination NAT it to the real IP addresses in network B.

Router B:

/ip route
add dst-address=192.168.98.0/24 gateway=172.16.0.1

And the destination NAT rule to route the traffic to the 192.168.0.247 IP on network B (In this example one rule for each server you want to reach)

Router B:

/ip firewall nat
add chain=dstnat dst-address=192.168.99.247 action=dst-nat to-address=192.168.0.247
To reach 192.168.0.10 on router A do exactly the opposite, netmap the range to 192.168.99.x on router B and add a destination NAT on router A.

Router B:

/ip firewall nat 
add chain=srcnat src-address=192.168.0.2-192.168.0.254 dst-address=192.168.98.0/24 action=netmap to-addresses=192.168.99.2-192.168.99.254

Router A:

/ip firewall nat
add chain=dstnat dst-address=192.168.98.10 action=dst-nat to-address=192.168.0.10

This should complete the setup and you should be able to ping 192.168.99.247 from an IP on router A LAN subnet.

To further make things easier to use either DNS entries can be used or if the IP addresses you want to route to on the remote subnet are not used locally add them locally with a destination NAT so that you can use the real IP address locally to reach the remote server.

Sample:

Router A:

/ip firewall nat
add chain=dstnat in-interface=ether2 dst-address=192.168.0.247 action=dst-nat to-address=192.168.99.247