+# "Frame Modification": "vlan" # One of the supported frame modifications:
+# # vlan, mpls, mac, dscp, ttl, ip_addr,
+# # ip_port.
+# "biDirectional": [true|false], # Specifies if generated traffic will be
+# # full-duplex (true) or half-duplex (false)
+# # It can be overridden by cli option bidirectional.
+# # Default value is "false".
+# "MultiStream": 0-65535 # Optional. Defines number of flows simulated
+# # by traffic generator. Value 0 disables
+# # MultiStream feature
+# # It can be overridden by cli option multistream.
+# "Stream Type": ["L2"|"L3"|"L4"] # Optional. Stream Type is an extension
+# # of the "MultiStream" feature. If MultiStream
+# # is disabled, then Stream Type will be ignored.
+# # Stream Type defines ISO OSI network layer
+# # used for simulation of multiple streams.
+# # It can be overridden by cli option stream_type.
+# # Values:
+# # "L2" - iteration of destination MAC address
+# # "L3" - iteration of destination IP address
+# # "L4" - iteration of destination UDP port
+# # Default value is "L4".
+# "Pre-installed Flows": ["Yes"|"No"]
+# # Optional. Pre-installed Flows is an extension
+# # of the "MultiStream" feature. If MultiStream
+# # is disabled, then Pre-installed Flows will be
+# # ignored. It defines if stream specific flows
+# # will be inserted into OVS or not.
+# # It can be overridden by cli option
+# # pre-installed_flows
+# # Values:
+# # "Yes" - flows will be inserted into OVS
+# # "No" - flows won't be inserted into OVS
+# # Default value is "No".
+# "Flow Type": ["port"|"IP"] # Optional. Defines flows complexity. In case
+# # it isn't specified, then "port" will be used.
+# # Values:
+# # "port" - flow is defined by ingress ports
+# # "IP" - flow is defined by ingress ports
+# # and src and dst IP addresses
+# "iLoad": 0-100 # Optional. Defines desired percentage
+# # of frame rate used during continuous stream
+# # tests. Can be overridden by cli option
+# # iload.
+# # Default value is 100.
+# "Load": dictionary # Optional. Configures background load
+# # during testcase execution.
+# Description of "Load" dictionary keys, their meanings and available values:
+#
+# "tool": "stress" # One of the supported load generators.
+# "load": 0-100 # percentage of cores which should be
+# # utilized by load generator
+# # e.g. load = 70%, detected cpu cores = 14 =>
+# # round(14*0.7)=10, i.e. 10 instances of load
+# # generator will be executed
+# "reserved": 0- (Default 0) # Optional. Defines number of cores reserved
+# # for vsperf
+# # e.g. load = 80%, detected cpu cores = 14,
+# # reserved = 4 => round((14-4)*0.8)=8,
+# # i.e. 8 load gen. instances will be executed
+# "pattern" : "c" # stress/stress-ng specific; Number of 'c',
+# # 'm' and 'i' defines ratio between cpu, mem
+# # and io workers respectively
+# # e.g. "ccccmmi" => ratio among workers types
+# # will be 3:2:1, so in case that 12 stress
+# # instances should be executed, then 6 cpu,
+# # 4 memory and 2 io workers will be executed
+# "load_memory": 0-100 # Optional. Defines percentage of the system
+# # memory, which should be utilized by memory
+# # workers (if they are part of "pattern").
+# # if not specified then default stress(-ng)
+# # value will be used
+# "options": "" # Optional. Additional command line options
+# # to be passed to the load generator.