Troubleshooting Non Meraki VPN Peers

[Husto]

Hi All, running a HA MX95 with Firmware 16.16 and having problems establishing a VPN tunnel to an older Sophos XG Firewall. Occasionally the tunnel will establish, but the routing isn't working over the tunnel. It seems like from version 15.12 onwards the event log no longer records what is happening. Any clues on how to troubleshoot would be appreciated.

[SoCalRacer]

Increase timeouts and reboot the MX. Can you see logs on the Sophos side?

[Kyojuro]

Have you tried applying the All Non-Meraki / Client VPN filter in the event logs? Seems like that's what Meraki recommends for Non Meraki peer VPN traffic.