network - Two router connected directly can't ping each other - Network Engineering Stack Exchange
How to ping your router? – 192.168.1.1 – Wireless Router Configuration
Routing between vlans and ping test
Cannot ping device in same network, but can ping it from different network - Networking - Level1Techs Forums
How to Perform a Computer Ping Test (And When You Need To)
routing - How the two computers are able to ping themselves which are connected to single router but both are in different Network? - Network Engineering Stack Exchange