1. Is it full loss of packets or intermittent ?
-> It is intermittent.
2. How long do they last ?
-> Last till 14-15 minutes.
3. Does all traffic get dropped at the firewall ?
->No, We get almost 10 ICMP responses of echo-reply after continuous drops & We are facing this issue from one direction only. From LAN -> DMZ network.
4. Can you still access certain interfaces on the firewall when the packet drops are happening ?
-> What do you mean by "access certain interfaces". Is it means to access the firewall itself we are not facing issue while accessing the firewall management access.
Hope, These are the responses of your queries.
We are suspecting the issue from switch side. It is cisco Catalyst 9300. But not sure how to check.
Kindly let me know if required more details.