Question: When a PGW-C (Control Plane) requests a PGW-U (User Plane) to resume forwarding packets for a previously suspended PDN connection, which of the following actions is taken?
Option 1: Setting the DROP flag in the Apply Action IE of the FARs to prevent packet forwarding.
Option 2: Updating the QERs with a Gate Status IE set to PENDING.
Option 3: Setting the FORW flag in the Apply Action IE of the FARs or setting the gate fields in the Gate Status IE of QERs to OPEN.
Option 4: Disabling all PFCP sessions temporarily until the PDN connection is fully re-established.
Explanation: When resuming a suspended PDN (Packet Data Network) connection, the Control Plane (PGW-C) needs to instruct the User Plane (PGW-U) to start forwarding packets again. This is achieved by either setting the FORW (Forward) flag in the Apply Action IE of the Filtering Rules (FARs) for the relevant PFCP (Packet Forwarding Control Protocol) session, which explicitly allows packet forwarding, or by updating the Quality of Service Enforcement Rules (QERs) with a Gate Status set to OPEN, indicating that packets should be allowed through. This ensures seamless re-establishment of the PDN connection's data flow.