Can’t ping local computer on Macbook, but can on iPhone

I have a computer on my network that I can reach from my iPhone (at the same IP), but my Macbook can’t seem to be able to ping it. I have my firewall disabled on my Macbook, and I’m not sure what could cause this. All I have are guesses, and I figure someone else would know better.

Please confirm as follows:

1. Check TCP/IP information on Mac and iPhone and whether same IP address is not in use or not.
2. Check DHCP server configuration such reserved IP address with MAC address, scope option and others.