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Version du 21 janvier 2025 à 14:39
We have two sites, Site1 with local network range 10.1.101.0/24 and Site2 with local network range 10.1.202.0/24.
The first step is to create GRE tunnels. A router on site 1:
/interface gre add name=myGre remote-address=192.168.90.1 local-address=192.168.80.1
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A router on site 2:
/interface gre add name=myGre remote-address=192.168.80.1 local-address=192.168.90.1
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As you can see tunnel configuration is quite simple.
In this example, a keepalive is not configured, so tunnel interface will have a running flag even if remote tunnel end is not reachable
Now we just need to set up tunnel addresses and proper routing. A router on site 1:
/ip address add address=172.16.1.1/30 interface=myGre
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A router on site 2:
/ip address add address=172.16.1.2/30 interface=myGre
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At this point, both sites have Layer 3 connectivity over the GRE tunnel.
