Comment 3 for bug 2052485

A note about my previous comment. It *should not* help if proxy-arp is enabled (it shouldn’t be needed on the switch). That’s just a troubleshooting step for testing to make sure that the topology isn’t relying on L2 to forward packets.

I would expect that there should be a default route on the compute hosts pointing toward the cumulus switch, and there should not be a route to the 172.24.4.0/24 anywhere (the routes in the Cumulus switch should be /32 routes pointing to the compute hosts).

You may want to take packet captures to see what’s happening, check counters, or dump flows to see where the pings are traversing and where they are missing from the path between the VMs.