C-Dash: replace s3-logs by logs
[csit.git] / resources / libraries / python / VppConfigGenerator.py
index 4943c1a..4191c0e 100644 (file)
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2024 Cisco and/or its affiliates.
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at:
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""VPP Configuration File Generator library.
-
-TODO: Support initialization with default values,
-so that we do not need to have block of 6 "Add Unix" commands
-in 7 various places of CSIT code.
-"""
+"""VPP Configuration File Generator library."""
 
 import re
 
@@ -26,7 +21,7 @@ from resources.libraries.python.topology import NodeType
 from resources.libraries.python.topology import Topology
 from resources.libraries.python.VPPUtil import VPPUtil
 
-__all__ = [u"VppConfigGenerator"]
+__all__ = ["VppConfigGenerator", "VppInitConfig"]
 
 
 def pci_dev_check(pci_dev):
@@ -54,21 +49,17 @@ class VppConfigGenerator:
     def __init__(self):
         """Initialize library."""
         # VPP Node to apply configuration on
-        self._node = u""
+        self._node = ""
         # Topology node key
-        self._node_key = u""
+        self._node_key = ""
         # VPP Configuration
         self._nodeconfig = dict()
         # Serialized VPP Configuration
-        self._vpp_config = u""
+        self._vpp_config = ""
         # VPP Service name
-        self._vpp_service_name = u"vpp"
-        # VPP Logfile location
-        self._vpp_logfile = u"/tmp/vpe.log"
+        self._vpp_service_name = "vpp"
         # VPP Startup config location
-        self._vpp_startup_conf = u"/etc/vpp/startup.conf"
-        # VPP Startup config backup location
-        self._vpp_startup_conf_backup = None
+        self._vpp_startup_conf = "/etc/vpp/startup.conf"
 
     def set_node(self, node, node_key=None):
         """Set DUT node.
@@ -79,29 +70,13 @@ class VppConfigGenerator:
         :type node_key: str
         :raises RuntimeError: If Node type is not DUT.
         """
-        if node[u"type"] != NodeType.DUT:
+        if node["type"] != NodeType.DUT:
             raise RuntimeError(
-                u"Startup config can only be applied to DUTnode."
+                "Startup config can only be applied to DUTnode."
             )
         self._node = node
         self._node_key = node_key
 
-    def set_vpp_logfile(self, logfile):
-        """Set VPP logfile location.
-
-        :param logfile: VPP logfile location.
-        :type logfile: str
-        """
-        self._vpp_logfile = logfile
-
-    def set_vpp_startup_conf_backup(self, backup=u"/etc/vpp/startup.backup"):
-        """Set VPP startup configuration backup.
-
-        :param backup: VPP logfile location.
-        :type backup: str
-        """
-        self._vpp_startup_conf_backup = backup
-
     def get_config_str(self):
         """Get dumped startup configuration in VPP config format.
 
@@ -127,8 +102,8 @@ class VppConfigGenerator:
         if path[0] not in config:
             config[path[0]] = dict()
         elif isinstance(config[path[0]], str):
-            config[path[0]] = dict() if config[path[0]] == u"" \
-                else {config[path[0]]: u""}
+            config[path[0]] = dict() if config[path[0]] == "" \
+                else {config[path[0]]: ""}
         self.add_config_item(config[path[0]], value, path[1:])
 
     def dump_config(self, obj, level=-1):
@@ -140,7 +115,7 @@ class VppConfigGenerator:
         :type level: int
         :returns: nothing
         """
-        indent = u"  "
+        indent = "  "
         if level >= 0:
             self._vpp_config += f"{level * indent}{{\n"
         if isinstance(obj, dict):
@@ -156,53 +131,56 @@ class VppConfigGenerator:
         if level >= 0:
             self._vpp_config += f"{level * indent}}}\n"
 
-    def add_unix_log(self, value=None):
+    def add_unix_log(self, value="/var/log/vpp/vpp.log"):
         """Add UNIX log configuration.
 
         :param value: Log file.
         :type value: str
         """
-        path = [u"unix", u"log"]
-        if value is None:
-            value = self._vpp_logfile
+        path = ["unix", "log"]
         self.add_config_item(self._nodeconfig, value, path)
 
-    def add_unix_cli_listen(self, value=u"/run/vpp/cli.sock"):
+    def add_unix_cli_listen(self, value="/run/vpp/cli.sock"):
         """Add UNIX cli-listen configuration.
 
         :param value: CLI listen address and port or path to CLI socket.
         :type value: str
         """
-        path = [u"unix", u"cli-listen"]
+        path = ["unix", "cli-listen"]
         self.add_config_item(self._nodeconfig, value, path)
 
-    def add_unix_gid(self, value=u"vpp"):
+    def add_unix_cli_no_pager(self):
+        """Add UNIX cli-no-pager configuration."""
+        path = ["unix", "cli-no-pager"]
+        self.add_config_item(self._nodeconfig, "", path)
+
+    def add_unix_gid(self, value="vpp"):
         """Add UNIX gid configuration.
 
         :param value: Gid.
         :type value: str
         """
-        path = [u"unix", u"gid"]
+        path = ["unix", "gid"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_unix_nodaemon(self):
         """Add UNIX nodaemon configuration."""
-        path = [u"unix", u"nodaemon"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["unix", "nodaemon"]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_unix_coredump(self):
         """Add UNIX full-coredump configuration."""
-        path = [u"unix", u"full-coredump"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["unix", "full-coredump"]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_unix_exec(self, value):
         """Add UNIX exec configuration."""
-        path = [u"unix", u"exec"]
+        path = ["unix", "exec"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_socksvr(self, socket=Constants.SOCKSVR_PATH):
         """Add socksvr configuration."""
-        path = [u"socksvr", u"socket-name"]
+        path = ["socksvr", "socket-name"]
         self.add_config_item(self._nodeconfig, socket, path)
 
     def add_graph_node_variant(self, variant=Constants.GRAPH_NODE_VARIANT):
@@ -211,39 +189,48 @@ class VppConfigGenerator:
         :param value: Graph node variant default value.
         :type value: str
         """
-        if variant == u"":
+        if variant == "":
             return
-        variant_list = [u"hsw", u"skx", u"icl"]
+        variant_list = ["hsw", "skx", "icl"]
         if variant not in variant_list:
             raise ValueError("Invalid graph node variant value")
-        path = [u"node", u"default", u"variant"]
+        path = ["node", "default", "variant"]
         self.add_config_item(self._nodeconfig, variant, path)
 
-    def add_api_segment_gid(self, value=u"vpp"):
-        """Add API-SEGMENT gid configuration.
+    def add_api_segment_gid(self, value="vpp"):
+        """Add api-segment gid configuration.
 
         :param value: Gid.
         :type value: str
         """
-        path = [u"api-segment", u"gid"]
+        path = ["api-segment", "gid"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_api_segment_global_size(self, value):
-        """Add API-SEGMENT global-size configuration.
+        """Add api-segment global-size configuration.
 
         :param value: Global size.
         :type value: str
         """
-        path = [u"api-segment", u"global-size"]
+        path = ["api-segment", "global-size"]
+        self.add_config_item(self._nodeconfig, value, path)
+
+    def add_api_segment_prefix(self, value="vpp"):
+        """Add api-segment prefix configuration.
+
+        :param value: Gid.
+        :type value: str
+        """
+        path = ["api-segment", "prefix"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_api_segment_api_size(self, value):
-        """Add API-SEGMENT api-size configuration.
+        """Add api-segment api-size configuration.
 
         :param value: API size.
         :type value: str
         """
-        path = [u"api-segment", u"api-size"]
+        path = ["api-segment", "api-size"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_buffers_per_numa(self, value):
@@ -252,7 +239,7 @@ class VppConfigGenerator:
         :param value: Number of buffers allocated.
         :type value: int
         """
-        path = [u"buffers", u"buffers-per-numa"]
+        path = ["buffers", "buffers-per-numa"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_buffers_default_data_size(self, value):
@@ -261,7 +248,7 @@ class VppConfigGenerator:
         :param value: Buffers data-size allocated.
         :type value: int
         """
-        path = [u"buffers", u"default data-size"]
+        path = ["buffers", "default data-size"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_dpdk_dev(self, *devices):
@@ -272,35 +259,26 @@ class VppConfigGenerator:
         """
         for device in devices:
             if pci_dev_check(device):
-                path = [u"dpdk", f"dev {device}"]
-                self.add_config_item(self._nodeconfig, u"", path)
-
-    def add_dpdk_dev_parameter(self, device, parameter, value):
-        """Add parameter for DPDK device.
-
-        :param device: PCI device (format xxxx:xx:xx.x).
-        :param parameter: Parameter name.
-        :param value: Parameter value.
-        :type device: str
-        :type parameter: str
-        :type value: str
-        """
-        if pci_dev_check(device):
-            path = [u"dpdk", f"dev {device}", parameter]
-            self.add_config_item(self._nodeconfig, value, path)
+                path = ["dpdk", f"dev {device}"]
+                self.add_config_item(self._nodeconfig, "", path)
 
-    def add_dpdk_cryptodev(self, count):
+    def add_dpdk_cryptodev(self, count, num_rx_queues=1):
         """Add DPDK Crypto PCI device configuration.
 
         :param count: Number of HW crypto devices to add.
+        :param num_rx_queues: Number of RX queues per QAT interface.
         :type count: int
-        """
-        cryptodev = Topology.get_cryptodev(self._node)
-        for i in range(count):
-            cryptodev_config = re.sub(r"\d.\d$", f"1.{str(i)}", cryptodev)
-            path = [u"dpdk", f"dev {cryptodev_config}"]
-            self.add_config_item(self._nodeconfig, u"", path)
-        self.add_dpdk_uio_driver(u"vfio-pci")
+        :type num_rx_queues: int
+        """
+        cryptodevs = Topology.get_cryptodev(self._node)
+        for device in cryptodevs.values():
+            for i in range(int(count/len(cryptodevs))):
+                numvfs = device["numvfs"]
+                computed = f"{(i+1)//numvfs}.{(i+1)%numvfs}"
+                addr = re.sub(r"\d.\d$", computed, device["pci_address"])
+                path = ["dpdk", f"dev {addr}", "num-rx-queues"]
+                self.add_config_item(self._nodeconfig, num_rx_queues, path)
+        self.add_dpdk_uio_driver("vfio-pci")
 
     def add_dpdk_sw_cryptodev(self, sw_pmd_type, socket_id, count):
         """Add DPDK SW Crypto device configuration.
@@ -315,8 +293,8 @@ class VppConfigGenerator:
         for _ in range(count):
             cryptodev_config = f"vdev cryptodev_{sw_pmd_type}_pmd," \
                 f"socket_id={str(socket_id)}"
-            path = [u"dpdk", cryptodev_config]
-            self.add_config_item(self._nodeconfig, u"", path)
+            path = ["dpdk", cryptodev_config]
+            self.add_config_item(self._nodeconfig, "", path)
 
     def add_dpdk_dev_default_rxq(self, value):
         """Add DPDK dev default rxq configuration.
@@ -324,7 +302,7 @@ class VppConfigGenerator:
         :param value: Default number of rxqs.
         :type value: str
         """
-        path = [u"dpdk", u"dev default", u"num-rx-queues"]
+        path = ["dpdk", "dev default", "num-rx-queues"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_dpdk_dev_default_txq(self, value):
@@ -333,7 +311,7 @@ class VppConfigGenerator:
         :param value: Default number of txqs.
         :type value: str
         """
-        path = [u"dpdk", u"dev default", u"num-tx-queues"]
+        path = ["dpdk", "dev default", "num-tx-queues"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_dpdk_dev_default_rxd(self, value):
@@ -342,7 +320,7 @@ class VppConfigGenerator:
         :param value: Default number of rxds.
         :type value: str
         """
-        path = [u"dpdk", u"dev default", u"num-rx-desc"]
+        path = ["dpdk", "dev default", "num-rx-desc"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_dpdk_dev_default_txd(self, value):
@@ -351,22 +329,27 @@ class VppConfigGenerator:
         :param value: Default number of txds.
         :type value: str
         """
-        path = [u"dpdk", u"dev default", u"num-tx-desc"]
+        path = ["dpdk", "dev default", "num-tx-desc"]
         self.add_config_item(self._nodeconfig, value, path)
 
+    def add_dpdk_dev_default_tso(self):
+        """Add DPDK dev default tso configuration."""
+        path = [u"dpdk", u"dev default", u"tso"]
+        self.add_config_item(self._nodeconfig, "on", path)
+
     def add_dpdk_log_level(self, value):
         """Add DPDK log-level configuration.
 
         :param value: Log level.
         :type value: str
         """
-        path = [u"dpdk", u"log-level"]
+        path = ["dpdk", "log-level"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_dpdk_no_pci(self):
         """Add DPDK no-pci."""
-        path = [u"dpdk", u"no-pci"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["dpdk", "no-pci"]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_dpdk_uio_driver(self, value=None):
         """Add DPDK uio-driver configuration.
@@ -378,7 +361,7 @@ class VppConfigGenerator:
         """
         if value is None:
             value = Topology.get_uio_driver(self._node)
-        path = [u"dpdk", u"uio-driver"]
+        path = ["dpdk", "uio-driver"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_dpdk_max_simd_bitwidth(self, variant=Constants.GRAPH_NODE_VARIANT):
@@ -387,23 +370,28 @@ class VppConfigGenerator:
         :param value: Graph node variant default value.
         :type value: str
         """
-        if variant == u"icl":
+        if variant == "icl":
             value = 512
-        elif variant in [u"skx", u"hsw"]:
+        elif variant in ["skx", "hsw"]:
             value = 256
         else:
             return
 
-        path = [u"dpdk", u"max-simd-bitwidth"]
+        path = ["dpdk", "max-simd-bitwidth"]
         self.add_config_item(self._nodeconfig, value, path)
 
+    def add_dpdk_enable_tcp_udp_checksum(self):
+        """Add DPDK enable-tcp-udp-checksum configuration."""
+        path = [u"dpdk", u"enable-tcp-udp-checksum"]
+        self.add_config_item(self._nodeconfig, u"", path)
+
     def add_cpu_main_core(self, value):
         """Add CPU main core configuration.
 
         :param value: Main core option.
         :type value: str
         """
-        path = [u"cpu", u"main-core"]
+        path = ["cpu", "main-core"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_cpu_corelist_workers(self, value):
@@ -412,7 +400,7 @@ class VppConfigGenerator:
         :param value: Corelist-workers option.
         :type value: str
         """
-        path = [u"cpu", u"corelist-workers"]
+        path = ["cpu", "corelist-workers"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_main_heap_size(self, value):
@@ -421,7 +409,7 @@ class VppConfigGenerator:
         :param value: Amount of heap.
         :type value: str
         """
-        path = [u"memory", u"main-heap-size"]
+        path = ["memory", "main-heap-size"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_main_heap_page_size(self, value):
@@ -430,13 +418,22 @@ class VppConfigGenerator:
         :param value: Heap page size.
         :type value: str
         """
-        path = [u"memory", u"main-heap-page-size"]
+        path = ["memory", "main-heap-page-size"]
+        self.add_config_item(self._nodeconfig, value, path)
+
+    def add_default_hugepage_size(self, value=Constants.DEFAULT_HUGEPAGE_SIZE):
+        """Add Default Hugepage Size configuration.
+
+        :param value: Hugepage size.
+        :type value: str
+        """
+        path = ["memory", "default-hugepage-size"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_api_trace(self):
         """Add API trace configuration."""
-        path = [u"api-trace", u"on"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["api-trace", "on"]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_ip6_hash_buckets(self, value):
         """Add IP6 hash buckets configuration.
@@ -444,7 +441,7 @@ class VppConfigGenerator:
         :param value: Number of IP6 hash buckets.
         :type value: str
         """
-        path = [u"ip6", u"hash-buckets"]
+        path = ["ip6", "hash-buckets"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_ip6_heap_size(self, value):
@@ -453,13 +450,53 @@ class VppConfigGenerator:
         :param value: IP6 Heapsize amount.
         :type value: str
         """
-        path = [u"ip6", u"heap-size"]
+        path = ["ip6", "heap-size"]
         self.add_config_item(self._nodeconfig, value, path)
 
-    def add_spd_flow_cache_ipv4_outbound(self):
-        """Add SPD flow cache for IP4 outbound traffic"""
-        path = [u"ipsec", u"ipv4-outbound-spd-flow-cache"]
-        self.add_config_item(self._nodeconfig, "on", path)
+    def add_ipsec_spd_flow_cache_ipv4_inbound(self, value):
+        """Add IPsec spd flow cache for IP4 inbound.
+
+        :param value: "on" to enable spd flow cache.
+        :type value: str
+        """
+        path = ["ipsec", "ipv4-inbound-spd-flow-cache"]
+        self.add_config_item(self._nodeconfig, value, path)
+
+    def add_ipsec_spd_flow_cache_ipv4_outbound(self, value):
+        """Add IPsec spd flow cache for IP4 outbound.
+
+        :param value: "on" to enable spd flow cache.
+        :type value: str
+        """
+        path = ["ipsec", "ipv4-outbound-spd-flow-cache"]
+        self.add_config_item(self._nodeconfig, value, path)
+
+    def add_ipsec_spd_fast_path_ipv4_inbound(self, value):
+        """Add IPsec spd fast path for IP4 inbound.
+
+        :param value: "on" to enable spd fast path.
+        :type value: str
+        """
+        path = [u"ipsec", u"ipv4-inbound-spd-fast-path"]
+        self.add_config_item(self._nodeconfig, value, path)
+
+    def add_ipsec_spd_fast_path_ipv4_outbound(self, value):
+        """Add IPsec spd fast path for IP4 outbound.
+
+        :param value: "on" to enable spd fast path.
+        :type value: str
+        """
+        path = ["ipsec", "ipv4-outbound-spd-fast-path"]
+        self.add_config_item(self._nodeconfig, value, path)
+
+    def add_ipsec_spd_fast_path_num_buckets(self, value):
+        """Add num buckets for IPsec spd fast path.
+
+        :param value: Number of buckets.
+        :type value: int
+        """
+        path = ["ipsec", "spd-fast-path-num-buckets"]
+        self.add_config_item(self._nodeconfig, value, path)
 
     def add_statseg_size(self, value):
         """Add Stats Heap Size configuration.
@@ -467,7 +504,7 @@ class VppConfigGenerator:
         :param value: Stats heapsize amount.
         :type value: str
         """
-        path = [u"statseg", u"size"]
+        path = ["statseg", "size"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_statseg_page_size(self, value):
@@ -476,7 +513,7 @@ class VppConfigGenerator:
         :param value: Stats heapsize amount.
         :type value: str
         """
-        path = [u"statseg", u"page-size"]
+        path = ["statseg", "page-size"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_statseg_per_node_counters(self, value):
@@ -485,7 +522,7 @@ class VppConfigGenerator:
         :param value: "on" to switch the counters on.
         :type value: str
         """
-        path = [u"statseg", u"per-node-counters"]
+        path = ["statseg", "per-node-counters"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_plugin(self, state, *plugins):
@@ -497,27 +534,27 @@ class VppConfigGenerator:
         :type plugins: list
         """
         for plugin in plugins:
-            path = [u"plugins", f"plugin {plugin}", state]
-            self.add_config_item(self._nodeconfig, u" ", path)
+            path = ["plugins", f"plugin {plugin}", state]
+            self.add_config_item(self._nodeconfig, " ", path)
 
     def add_dpdk_no_multi_seg(self):
         """Add DPDK no-multi-seg configuration."""
-        path = [u"dpdk", u"no-multi-seg"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["dpdk", "no-multi-seg"]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_dpdk_no_tx_checksum_offload(self):
         """Add DPDK no-tx-checksum-offload configuration."""
-        path = [u"dpdk", u"no-tx-checksum-offload"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["dpdk", "no-tx-checksum-offload"]
+        self.add_config_item(self._nodeconfig, "", path)
 
-    def add_nat(self, value=u"deterministic"):
+    def add_nat(self, value="deterministic"):
         """Add NAT mode configuration.
 
         :param value: NAT mode.
         :type value: str
         """
-        path = [u"nat", value]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["nat", value]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_nat_max_translations_per_thread(self, value):
         """Add NAT max. translations per thread number configuration.
@@ -525,21 +562,21 @@ class VppConfigGenerator:
         :param value: NAT mode.
         :type value: str
         """
-        path = [u"nat", u"max translations per thread"]
+        path = ["nat", "max translations per thread"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_nsim_poll_main_thread(self):
         """Add NSIM poll-main-thread configuration."""
-        path = [u"nsim", u"poll-main-thread"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["nsim", "poll-main-thread"]
+        self.add_config_item(self._nodeconfig, "", path)
 
-    def add_tcp_congestion_control_algorithm(self, value=u"cubic"):
+    def add_tcp_congestion_control_algorithm(self, value="cubic"):
         """Add TCP congestion control algorithm.
 
         :param value: The congestion control algorithm to use. Example: cubic
         :type value: str
         """
-        path = [u"tcp", u"cc-algo"]
+        path = ["tcp", "cc-algo"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_tcp_preallocated_connections(self, value):
@@ -548,7 +585,7 @@ class VppConfigGenerator:
         :param value: The number of pre-allocated connections.
         :type value: int
         """
-        path = [u"tcp", u"preallocated-connections"]
+        path = ["tcp", "preallocated-connections"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_tcp_preallocated_half_open_connections(self, value):
@@ -557,18 +594,28 @@ class VppConfigGenerator:
         :param value: The number of pre-allocated half open connections.
         :type value: int
         """
-        path = [u"tcp", u"preallocated-half-open-connections"]
+        path = ["tcp", "preallocated-half-open-connections"]
         self.add_config_item(self._nodeconfig, value, path)
 
+    def add_tcp_tso(self):
+        """Add TCP tso configuration."""
+        path = [u"tcp", u"tso"]
+        self.add_config_item(self._nodeconfig, u"", path)
+
     def add_session_enable(self):
         """Add session enable."""
-        path = [u"session", u"enable"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["session", "enable"]
+        self.add_config_item(self._nodeconfig, "", path)
+
+    def add_session_app_socket_api(self):
+        """Use session app socket api."""
+        path = ["session", "use-app-socket-api"]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_session_event_queues_memfd_segment(self):
         """Add session event queue memfd segment."""
-        path = [u"session", u"evt_qs_memfd_seg"]
-        self.add_config_item(self._nodeconfig, u"", path)
+        path = ["session", "evt_qs_memfd_seg"]
+        self.add_config_item(self._nodeconfig, "", path)
 
     def add_session_event_queue_length(self, value):
         """Add session event queue length.
@@ -576,7 +623,7 @@ class VppConfigGenerator:
         :param value: Session event queue length.
         :type value: int
         """
-        path = [u"session", u"event-queue-length"]
+        path = ["session", "event-queue-length"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_event_queues_segment_size(self, value):
@@ -585,7 +632,7 @@ class VppConfigGenerator:
         :param value: Session event queue segment size.
         :type value: str
         """
-        path = [u"session", u"evt_qs_seg_size"]
+        path = ["session", "evt_qs_seg_size"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_preallocated_sessions(self, value):
@@ -594,7 +641,7 @@ class VppConfigGenerator:
         :param value: Number of pre-allocated sessions.
         :type value: int
         """
-        path = [u"session", u"preallocated-sessions"]
+        path = ["session", "preallocated-sessions"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_v4_session_table_buckets(self, value):
@@ -603,7 +650,7 @@ class VppConfigGenerator:
         :param value: Number of v4 session table buckets.
         :type value: int
         """
-        path = [u"session", u"v4-session-table-buckets"]
+        path = ["session", "v4-session-table-buckets"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_v4_session_table_memory(self, value):
@@ -612,7 +659,7 @@ class VppConfigGenerator:
         :param value: Size of v4 session table memory.
         :type value: str
         """
-        path = [u"session", u"v4-session-table-memory"]
+        path = ["session", "v4-session-table-memory"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_v4_halfopen_table_buckets(self, value):
@@ -621,7 +668,7 @@ class VppConfigGenerator:
         :param value: Number of v4 halfopen table buckets.
         :type value: int
         """
-        path = [u"session", u"v4-halfopen-table-buckets"]
+        path = ["session", "v4-halfopen-table-buckets"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_v4_halfopen_table_memory(self, value):
@@ -630,7 +677,7 @@ class VppConfigGenerator:
         :param value: Size of v4 halfopen table memory.
         :type value: str
         """
-        path = [u"session", u"v4-halfopen-table-memory"]
+        path = ["session", "v4-halfopen-table-memory"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_local_endpoints_table_buckets(self, value):
@@ -639,7 +686,7 @@ class VppConfigGenerator:
         :param value: Number of local endpoints table buckets.
         :type value: int
         """
-        path = [u"session", u"local-endpoints-table-buckets"]
+        path = ["session", "local-endpoints-table-buckets"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def add_session_local_endpoints_table_memory(self, value):
@@ -648,7 +695,31 @@ class VppConfigGenerator:
         :param value: Size of local endpoints table memory.
         :type value: str
         """
-        path = [u"session", u"local-endpoints-table-memory"]
+        path = ["session", "local-endpoints-table-memory"]
+        self.add_config_item(self._nodeconfig, value, path)
+
+    def add_session_use_dma(self):
+        """Add session use-dma configuration."""
+        path = [u"session", u"use-dma"]
+        self.add_config_item(self._nodeconfig, u"", path)
+
+    def add_dma_dev(self, devices):
+        """Add DMA devices configuration.
+
+        :param devices: DMA devices or work queues.
+        :type devices: list
+        """
+        for device in devices:
+            path = ["dsa", f"dev {device}"]
+            self.add_config_item(self._nodeconfig, "", path)
+
+    def add_logging_default_syslog_log_level(self, value="debug"):
+        """Add default logging level for syslog.
+
+        :param value: Log level.
+        :type value: str
+        """
+        path = ["logging", "default-syslog-log-level"]
         self.add_config_item(self._nodeconfig, value, path)
 
     def write_config(self, filename=None):
@@ -665,15 +736,9 @@ class VppConfigGenerator:
         if filename is None:
             filename = self._vpp_startup_conf
 
-        if self._vpp_startup_conf_backup is not None:
-            cmd = f"cp {self._vpp_startup_conf} {self._vpp_startup_conf_backup}"
-            exec_cmd_no_error(
-                self._node, cmd, sudo=True, message=u"Copy config file failed!"
-            )
-
         cmd = f"echo \"{self._vpp_config}\" | sudo tee {filename}"
         exec_cmd_no_error(
-            self._node, cmd, message=u"Writing config file failed!"
+            self._node, cmd, message="Writing config file failed!"
         )
 
     def apply_config(self, filename=None, verify_vpp=True):
@@ -693,9 +758,39 @@ class VppConfigGenerator:
         if verify_vpp:
             VPPUtil.verify_vpp(self._node)
 
-    def restore_config(self):
-        """Restore VPP startup.conf from backup."""
-        cmd = f"cp {self._vpp_startup_conf_backup} {self._vpp_startup_conf}"
-        exec_cmd_no_error(
-            self._node, cmd, sudo=True, message=u"Copy config file failed!"
-        )
+
+class VppInitConfig:
+    """VPP Initial Configuration."""
+    @staticmethod
+    def init_vpp_startup_configuration_on_all_duts(nodes):
+        """Apply initial VPP startup configuration on all DUTs.
+
+        :param nodes: Nodes in the topology.
+        :type nodes: dict
+        """
+        huge_size = Constants.DEFAULT_HUGEPAGE_SIZE
+        for node in nodes.values():
+            if node["type"] == NodeType.DUT:
+                vpp_config = VppConfigGenerator()
+                vpp_config.set_node(node)
+                vpp_config.add_unix_log()
+                vpp_config.add_unix_cli_listen()
+                vpp_config.add_unix_cli_no_pager()
+                vpp_config.add_unix_gid()
+                vpp_config.add_unix_coredump()
+                vpp_config.add_socksvr(socket=Constants.SOCKSVR_PATH)
+                vpp_config.add_main_heap_size("2G")
+                vpp_config.add_main_heap_page_size(huge_size)
+                vpp_config.add_default_hugepage_size(huge_size)
+                vpp_config.add_statseg_size("2G")
+                vpp_config.add_statseg_page_size(huge_size)
+                vpp_config.add_statseg_per_node_counters("on")
+                vpp_config.add_plugin("disable", "default")
+                vpp_config.add_plugin("enable", "dpdk_plugin.so")
+                vpp_config.add_dpdk_dev(
+                    *[node["interfaces"][interface].get("pci_address") \
+                        for interface in node["interfaces"]]
+                )
+                vpp_config.add_ip6_hash_buckets(2000000)
+                vpp_config.add_ip6_heap_size("4G")
+                vpp_config.apply_config()