Using /28 IP behind Mikrotik

RouterOS Beginner Basics
1

Hi,

We’ve an RB3011 with an PPP-client (fiber) and the PPP-client getting IP-address: 1.1.1.81
Our provider has provided us an /28 subnet (16 hosts)

We have created a bridge and assigned them to ports Eth2 and Eth3

My question is:
How do I need the configure an mikrotik to use the IP-address 1.1.1.85 of 1.1.1.90 on bridge-poort Eth2 and Eth3.

I’ve managed to connect my laptop to Eth2 when using the IP-address, but cannot make it work on the Mikrotik.

I hope someone can help me with this.

Best regards,
Joost Lauwen

2

Is the WAN connection (presumably PPPoE rather actual PPP on a serial port) part of the /28, i.e. are you assigned 1.1.1.81/28? (I’m assuming 1.1.1.81 is not the real address)

If this is the case just add 1.1.1.81/28 as the address of the bridge interface, hosts connected to ether2 or ether3 can use any addresses 1.1.1.82 - 1.1.1.94

Edit: Fixed host address range

3

Thanks for your answer. WAN-connection is PPPoE on Eth1. Below an screenshot of the dynamic IP-address and the ip-range on the bridge.
ip-address-pppoe.jpg
ip-address-bridge.jpg
How do i need to add the IP-addresses on the host? 1.1.1.82/32 or 1.1.1.82/28 or something else?

4

1.1.1.82/28 (or 1.1.1.82 with netmask 255.255.255.240) and gateway 1.1.1.81

5

Hi,

Thanks.
I need to provide the gateway under IP -Routes, is that right?

6

No, that is the gateway address to set on the additional hosts. The Mikrotik should have a route from having add-default-route=yes in /interface pppoe-client

7

Hi tdw,

I’ve managed to configure the right IP-addresses on our second Mikrotik.

Thanks for the input.

Best regards,
Joost Lauwen