Changing the subnet mask - what will happen to the VPN

[Tokerau]

I am new to Meraki.

We have two locations connected with a site to site VPN , MX's on both sides. The HQ side has a subnet of /22 and the remote is /24 on its LAN. I need to change the subnet mask at the remote site to /22 to add more subnets. I would also like to change the gateway IP to .1, it is currently .250

What will happen to the VPN if I change the subnet mask and the gateway IP? Will I have to reconfigure it, or will it see the changes and adjust on its own?

Thanks!

[CptnCrnch · Accepted solution]

VPN will reconfigure itself automatically. Will it run without any hickups? Possibly not, so I‘d recommend performing this change with a planned (shortish) downtime.

[Tokerau]

Thank you! This will be done after hours, so downtime will not be a factor.

This makes the job much easier.

[Inderdeep]

@Tokerau : I agree with @CptnCrnch there might not be any issue but take downtime for this change