Hello,
The AR software includes the control and forwarding planes. The differences are as follows:
The forwarding panel forwards packets destined for another device. Generally, packets with inbound and outbound physical interfaces are called packets destined for another device.
Packets sent by the control plane do not enter the forwarding plane. Most of these packets are irrelevant to services deployed on the forwarding plane.
The ping 8.8.8.8 command executed on the AR is directly sent from the protocol stack to the outbound interface without entering the forwarding plane. Traffic filtering applies to the forwarding plane without involving the QoS process, so packets cannot be filtered. This is a normal situation that destination address 8.8.8.8 can be pinged on the AR.