How to Assign Public Pool to another mikrotik

RouterOS Beginner Basics
1

Dear all,

I’ve /26 public ip pool. which is working perfectly on Mikrotik Interface. and I’ve already configure BGP in my first core router. now I want to give client mikrotik router /27 pool. so how can do that?

I.E. i’ve 103.XX.64/26 Pool and I want to give 103.XX.96/27 pool to the client mikrotik
It’s public ip pool.

Please help me.

Thank you

2

It is quite straight-forward:

  • assign first host address from allocated subnet to the port of router which is serving your client and use appropriate subnet mask (/27)
  • instruct client to configure their router with some other address from the same subnet and use appropriate subnet mask
  • adjust firewall filter rules according to wishes/policy

For example: if you have e.g. 103.42.64.0/26 with your WAN interface address set to 103.42.64.1/26, and your client is served by ether13, then set ether13 address to be 103.42.64.33/27 and instruct client to configure their WAN interface with e.g. 103.42.64.34/27 and wisely use the rest of their IP address space. How to configure client router to deal with /27 address space coming in to WAN port is completely different issue (which had been dealt with on this forum a few times).

Example above assumes you’re using lowest part of /26 for your own use, hence first /27 subnet in the range (network address 103.42.64.0/27) is not free for your client. Other /27 network address from your /26 subnet is X.Y.Z.32/27 (2 subnets in total) and all addresses from given subnet address range need to be unoccupied in order to be allocated as subnet.

N.b. you can assign the /27 public address to ethernet port serving that particular client without breaking their current connectivity. When client migrates their setup to the new scheme (public /27 address), you can remove current setup from the ethernet port in question.