Swapping internet connections

[MerUser874]

Our primary internet connection is being discontinued so we are moving over to our backup connection. This backup connection was implemented recently and has been tested for internet, site-to-site VPN links between offices, and VoIP, all working as they should during a failover.
My question is does it make more sense to mark the backup connection (WAN2) as the primary and move the couple of settings (firewall) that need to be changed over to the new IPs or, physically move the backup connection up to WAN1 and reconfigure that port?

[RWelch]

Either way would work but that answer would likely be dependent upon if you want to do so during work hours (simply select primary upling as WAN2) or reconfiguring it in a maintenance window (after hours scenario) to move the backup ISP to WAN1 so as to not impact or interfere with business operations. 

Another consideration would likely depend on your long term plan on bringing in another ISP (or not).

[BlakeRichardson]

I would use this method unless you are OCD about the primary connection being in WAN 1.

[MerUser874]

I would love to get another backup ISP but this one took a year, even with multiple hiccups with our current ISP.

I think I will try moving the Primary uplink to WAN2 initially and then after testing possibly physically move this to WAN1 when our current circuit is disconnected.

Thanks!

[Mloraditch]

Are you planning on replacing the primary with something new? If so I'd leave things as-is and just move the settings for now.

If you aren't and you have a model where the second WAN is a combo port that also can be LAN (MX64/67/MX100), I'd strongly consider moving it as I've occasionally seen these models get configs screwed up during a power outage or similar scenario and lose that WAN designation for the secondary port, and recovering becomes more work.

If it's a model where the secondary WAN is always a WAN it's a bit more of a personal preference thing. As far as I know, there is no technical reason to make the change.

[MerUser874]

Because of all of the stability issues, I was going to use this backup as our primary and then have our current primary as the backup but with the current primary being disconnected in a couple of months, this new backup will be our only internet connection and will most likely stay our primary.
We are using a MX250 so we do have the dedicated WAN2 port.
At this point, I'm thinking of making WAN2 the primary uplink and changing the few external DNS pointers for testing over the next month and if all goes well, when the current primary is disconnected I may move this backup to WAN1. I just wanted to make sure there were not any major things to watch for.
Thanks!