Update: adding eBPF Map sizes parameters into the confing file

etc/config.yaml

@@ -229,6 +229,61 @@ upf:
   support_features:
     enable_bpf_datapath: yes    # If "on": BPF is used as datapath else simpleswitch is used, DEFAULT= off
     enable_qos: yes
+    
+    # OAI UPF EBPF MAP SIZES Configuration File
+    # These configuration map entries define key parameters for optimizing memory allocation and tuning the UPF. 
+    # The values set in this file directly impact the size of eBPF maps used for packet processing.
+    # Configuration Parameters: Each parameter in this file controls a specific aspect of UPF behavior.
+
+    # 1. Network Interface Limits
+
+    #     max_upf_interfaces (Default: 8)
+    #         Specifies the maximum number of network interfaces that UPF can manage.
+    #         Example: Physical/virtual interfaces for GTP-U traffic.
+
+    #     max_upf_redirect_interfaces (Default: 4)
+    #         Defines the maximum number of interfaces used for traffic redirection.
+    #         Example: Used in PDRs for forwarding packets to specific egress interfaces.
+
+    max_upf_interfaces: 8
+    max_upf_redirect_interfaces: 4
+
+
+
+    # 2. Session and Rule Limits
+
+    #     max_pdu_session (Default: 10,000)
+    #         Determines the maximum number of concurrent PDU sessions that UPF can handle.
+    #         Affects the memory allocation for session-related eBPF maps.
+
+    #     max_pdrs_per_pdu_session (Default: 8)
+    #         Defines the maximum number of Packet Detection Rules (PDRs) that can be applied per PDU session.
+    #         PDRs dictate how packets are processed, forwarded, or dropped.
+
+    #     max_qos_flows_per_pdu_session (Default: 8)
+    #         Sets the maximum number of QoS flows that a single PDU session can manage.
+    #         Impacts QoS-related eBPF maps (e.g., shaping, policing).
+
+    #     max_sdf_filters_per_pdu_session (Default: 8)
+    #         Specifies the maximum number of Service Data Flow (SDF) filters per session.
+    #         SDF filters define how traffic is classified within a QoS flow.
+
+    max_pdu_session: 10000
+    max_pdrs_per_pdu_session: 8
+    max_qos_flows_per_pdu_session: 8
+    max_sdf_filters_per_pdu_session: 8
+
+
+
+
+    # 3. ARP Table Limit
+
+    #     max_arp_entries (Default: 4)
+    #         Limits the number of ARP table entries stored in eBPF maps.
+    #         Used for resolving MAC addresses in the UPF forwarding path.
+
+    max_arp_entries: 1572
+
   remote_n6_gw: oai-ext-dn
   upf_info:
     sNssaiUpfInfoList: