Multiple WAN-IPs in bridge

RouterOS Beginner Basics
1

Hi,

We have a router running multiple(15) IP-addresses in a bridge on the wan-link. All IPs are on the same subnet with the same gw and default route outside the router.
How can I control, or at least check, which IP the Routerboard use outwards, e.g. when dialing PPP-links etc?

I assumed it would be either the first address entered or the lowest, but can’t be sure..
Been googling, but the answers I find are with src-nat, which won’t help here. :slight_smile:

Thanks in advance

2

If you use Torch on the WAN interface you can see which IPs are being used. SRC NAT can be used to affect IPs used for outbound traffic - e.g. use a certain IP for particular services / hosts.

3

The router will typically choose the “preferred source” for a given subnet when it chooses to send out traffic unless specified elsewhere in configuration, changed via NAT, or a preferred source is set for a default route. Check your /ip route for that information. The preferred source address will usually be the first IP address that was enabled/added to the router.