I have configured inside, outside and DMZ on the Palo Alto firewall. The outside interface is configured for Global Protect.
The default gateway of Palo Alto firewall is not reachable. But when we connect to that cable to ASA firewall we are able to ping gateway.
Please help us to troubleshooting the issue.
ParvezAhmad are you specifying the source of your pings as being the OUTSIDE interface of your PA that is facing your default gateway when you're doing your tests?
ping source 220.127.116.11 host 18.104.22.168
Also are you sure the PA firewall isn't blocking the pings? Do you have a policy rule defined that says "allow outside to outside" with App-ID ping?
Also as was previously mentioned if the PA has the same IP as the ASA you're testing with, it makes sense to force a gratuitous ARP to make sure the ARP cache on your default gateway device updates with the PA MAC address instead of the ASA MAC address.
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