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.
What egearhart says is true. If you "ping host www.yahoo.com" , the default interface chosen is the management interface. If your WAN interface has an IP of 188.8.131.52, use this syntax, ping source 184.108.40.206 host <IP_ADDR_Nexthop_Rtr>. Then check the arp cache on the ethernet port that corresponds to 220.127.116.11. If you do not see an entry for your ISP next hop then they have probably done a static entry for your IP and MAC in the switch. I have no idea why they do this but it is fairly common in the USA.
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