Attached is a switching layout that is in production. I'm having an issue with ttl expired responses that terminate at 2 newly installed Dell 8024s. When I ping an offline device with a valid ip address from my workstation I get ttl expired errors coming from these switches. The switch/router is the default gateway for the network so I'm curious to why the error is not originating from the router. The first response will come from the .18 switch and then the final 3 from the .17????