Hey Paul, Does the cloud provider have any IPsec logs from their end that they could share with you? Dave H   ... View more

Out of curiosity, what IP address is/was the MX using for itself in the 20.20.20.0 subnet? Could it have been using 20.20.20.1, the same address as the HP core SVI? Perhaps the HP hardware swap just forced a readdressing that no longer conflicts? Dave H ... View more

Hi Paul, what's at the far end of the site-to-site VPN tunnel? If it's a non-Meraki device, there could be a tunnel lifetime that expires or a rekeying even that occurs every hour. Dave H  ... View more

Hi, MatthewG3! That's a great question. I don't know of a way to clear the MAC address table from the dashboard. There might be a way via an API call, but will have to research that. Otherwise, the MAC address table is built to learn new entries dynamically, as ethernet frames arrive on switch ports. Existing entries get refreshed the same way. However, learned entries will automatically age out if no further frames are received for a fixed amount of time. That tends to keep the table up-to-date and tidy, with no manual intervention required. On Catalyst switches, MAC table entries age out after 300 seconds (5 minutes). On MS switches, the age out timer can vary depending on the chipsets used in the specific model. I hope this helps! ... View more

I used to work in a large hospital. One of the IDF closets in the basement was located inside another room. That's the door to the IDF, right behind that big box-shaped cart. So when you went in the IDF to work on something, you never knew when someone would push a cart back in and block the door shut. Oh yeah -- that box-shaped cart is the morgue cart.     The real problem with that IDF room was that the entire outer room could get filled with lots of carts, beds, etc, without warning -- to the point that it was impossible to get the IDF door open at all. I had a friend who went in the IDF to work for a while, and the door closed. A short time later, hospital staff filled up the outer room completely. He was by himself, with no one anywhere near, so he had to use the two-way radio he brought with him to call for help. That's the IDF door toward the back, impossible to get in or out of. And yes, that's the morgue cart again, over against the opposite wall. Complete scary log jam. ... View more