On this particular router, my upstream assigned two IPs from different subnets, so I technically have two default routes. One is just disabled since the default gateways in question are assigned to the same device. (I can communicate over each IP fine and everything was working fine in 5.x).

When referencing the terminal, I was under the understanding (per Butch's explanation) that when you issue /ip address print, the first publicly routable IP listed is the IP that the router will use for communication. In my case, the IP I WANT the router to use comes before the IP that it actually uses in the terminal listed of the IP addresses, however upon reboot it uses the other IP.

Rory McCann
Minn-Kota Ag Products
P: 701-403-4877 | E: [email protected]

On 7/1/2013 1:46 PM, Grand Avenue Broadband wrote:
Can you not utilize "pref-src" in the routing table to ensure the behavior you 
desire?

I may not be understanding your question -- particularly, your mention of "the 
terminal" increases my doubt.

On Jul 1, 2013, at 11:17 AM, Rory McCann <[email protected]> wrote:

Has something changed recently in routerOS v6.x that involves how the router 
chooses its IP address for outbound (router to internet or router to router) 
connectivity?

In the past, the router would always choose the first public IP address listed 
in the terminal for its outbound communications. In v6.1 (which I installed to 
utilize untagged VLAN support) I've noticed that it appears to be choosing the 
lowest integer IP rather than the first assigned.

Eg: I have a router with 10.10.10.1 and 10.10.10.10 assigned to it. 10.10.10.10 was the 
first one programmed and my "preferred" router communication IP for IPSec, 
EoIP, etc.

Upon reboot, the router starts talking on 10.10.10.1 instead of 10.10.10.10. I 
have to remove and re-add the IP in order to change this behavior. Upon reboot 
it again chooses 10.10.10.1.

Are there some new firewall/NAT rules that affect this behavior or a setting 
somewhere or is this some kind of obscure bug?

--
Rory McCann
Minn-Kota Ag Products
P: 701-403-4877 | E: [email protected]

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