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LunaticRv
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Joined: Mon Dec 31, 2018 8:50 am

Mikrotik to Mikrotik Connection Doesn't Work

Fri Jan 25, 2019 11:54 am

Hi,

I want to share internet to one of mikrotik from the one that has internet service.

What I want to do is to assign local IP to other mikrotik and share internet between these two.

My current setup is

Mikrotik A: (The one with internet)

ip address : 10.10.1.13/29 bound to bridge_X
I have src-natted this block to access internet and I can access to internet with this ip Mikrotik A without any problem

Mikrotik B:
ip address: 10.10.1.15/30 bound to WAN etherhet (which is connected to bridge_X)
route: 10.10.1.14


Shouldn't I be getting internet with this configuration? or do I have to specify exact ip address as stated on Mikrotik A?

Thanks for help
 
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mkx
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Re: Mikrotik to Mikrotik Connection Doesn't Work

Fri Jan 25, 2019 1:59 pm

Default route on Mikrotik B should be via IP address of Mikrotik A - in this case 10.10.1.13.

In addition to that: I don't think things will work at all. Mikrotik A has IP address 10.10.1.13/29, which means valid addresses are between 10.10.1.9 and 10.10.1.14 (and 10.10.1.15 is broadcast address for Mikrotik A). Mikrotik B has subnet mask /30, so valid addresses would be 10.10.1.13-10.10.1.14. Address 10.10.1.15 is again broadcast address.
 
LunaticRv
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Re: Mikrotik to Mikrotik Connection Doesn't Work

Fri Jan 25, 2019 2:14 pm

Default route on Mikrotik B should be via IP address of Mikrotik A - in this case 10.10.1.13.

In addition to that: I don't think things will work at all. Mikrotik A has IP address 10.10.1.13/29, which means valid addresses are between 10.10.1.9 and 10.10.1.14 (and 10.10.1.15 is broadcast address for Mikrotik A). Mikrotik B has subnet mask /30, so valid addresses would be 10.10.1.13-10.10.1.14. Address 10.10.1.15 is again broadcast address.
Thanks for prompt response Mkx,

What if I change the IP setup to the following;

Mikrotik A:
10.10.1.29/30
Firewall > NAT > Srcnat > 10.10.1.28/30

ip address add network=10.10.1.29/30 interface=X_BRIDGE
ip firewall nat add chain=srcnat action=src-nat to-addresses=OUT_IP_HERE  src-address=10.10.1.28/30 log=no log-prefix=""

Mikrotik B:
10.10.1.30/30
Route (GW): 10.10.1.29

ip address add network=10.10.1.30/30 interface=WAN_CONNECTED_TO_X_BRIDGE
ip route add dst-address=0.0.0.0/0 gateway=10.10.1.29

In this case would it work?

What I actually want to achieve is to only address ip from /30 instead of /24
 
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mkx
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Re: Mikrotik to Mikrotik Connection Doesn't Work

Fri Jan 25, 2019 2:48 pm

More or less, only it should be like this:

# on MT A
/ip address add address=10.10.1.29/30 interface=X_BRIDGE
#
# on MT B
/ip address add address=10.10.1.30/30 interface=WAN_CONNECTED_TO_X_BRIDGE
/ip route add gateway=10.10.1.29 # dst-address=0.0.0.0/0 can be omitted, that's default

But it would only work if those were the only addresses bound to both interfaces ... if they are really bridges with many client devices connected, then things will break. If you wan't to get some better insight, then describe your use case in greater detail ... and post config so we can compare it to your intended set-up.

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