topic PA is connected to a router in General Topics

PA is connected to a router

DavidyPalo — Sun, 16 Apr 2023 04:33:46 GMT

Hi PA(non-management interface) is connected to a router via a cable . What is minimus condition for the two device to ping each other?

1. ip address in interface are in same subnet,

2. interface associated with management profile to allow ping

3. interface type is L3

Any else?

The reason why i ask the question is the two device cannot see each other via arp. is this physical connection issue?

Thanks

Re: PA is connected to a router

TomYoung — Sun, 16 Apr 2023 09:13:50 GMT

Hi @DavidyPalo ,

There are a couple more minimal conditions I would add.

Make sure you source your ping from the desired interface. If you do not specify the source option, pings are sourced from the management interface.
You always need a security policy rule for any traffic to go to or through the NGFW. In your case, the intrazone-default rule will allow the traffic.
The router should not ave any ACLs applied to it also.

Then the "show arp" command on the CLI should show a MAC address for the router. If not, you do not have layer 2 connectivity between the NGFW and router.

Thanks,

Tom

Re: PA is connected to a router

DavidyPalo — Sun, 16 Apr 2023 15:20:03 GMT

Great!

After security policy is added, the ping can work. but after removing the security policy, the ping still can work. why it happen like that?

Re: PA is connected to a router

Raido_Rattameister — Sun, 16 Apr 2023 15:24:03 GMT

Under "Device > Config Audit" at the bottom there are droppdowns where you can choose different configs to compare.
Running config - currently active config
Candidate config - new changed config that has not been committed yet
"Go" button will initiate compare task.