Following the lab topology. I have made some adjustments to test different scenarios and this one kinda confused me.
suppose the following IP's
NYWAN1 - Gi 0/0 -> 172.16.0.1/16
NYACCESS1 - Vlan1 -> 172.16.0.2/16
PLABCSC001 - LAB_NIC -> 172.16.0.4/16
NYCORE1 - Vlan1 -> 192.168.16.3/24
The devices on the same subnet are able to ping each other which is expected (NYWAN1, NYACCESS1 AND PLABCSC001).
NYWAN1 AND PLABCS001 were not able to ping NYCORE1, but NYACCESS1 was able to do so, why?!
PLABCS001 was not able to ping it because it is on another subnet and there is no Default gateway IP set in the IPV4 settings, hence the ping was not successful.
NYWAN1 sent the ping traffic but got no response, hence it failed.
This is my own explination kindly let me know if am wrong.
Why was NYACCESS1 able to ping NYCORE1 with the given IP's?