Meraki AutoVPN Hub site - Control Traffic using large amount of data on WAN2

[bailey_hawker]

Hi,

I have an issue with a customer SD-WAN hub site that has recently moved over to a Starlink secondary connection (WAN2 uplink). The SD-wan hub site peers with 25 other hubs in the AutoVPN domain. The Starlink is showing 30GB of data consumed in 2 weeks, despite all data plane traffic flowing over the primary WAN1 internet connection.

Packet captures on the WAN2 interface reveal large amounts of registry/SD-WAN tunnel traffic. I understand that a good portion of this traffic could be keep alives as my customers network is configured to use the Multi-Uplink feature which pre-establishes tunnels over both WAN1 and WAN2.

Is there any backend tweaks that Meraki TAC can do to reduce the control traffic or am I best to investigate disabling the Multi-Uplink feature?

Kind regards,
Bailey

[RWelch]

I'm not aware of any backend tweaks.  If this hub doesn't truly need to be full mesh hub, you could consider the idea of converting it to a spoke to reduce tunnel count and traffic.....or keep it as a hub and disable the multi-uplink with WAN2 tunnels only in a failover scenario.

[PhilipDAth]

In uplink selection configure AutoVPN to only use WAN1 on your hub unless WAN1 has failed.