======Setting======
=====Setting up subnets for balancing=====
Balancing applies only to IP addresses belonging to the AS defined as ''local'' in ''asnum.dscp''.
    - Define an autonomous system with IP addresses that are used by subscribers:<code bash>vi aslocal.txt
10.0.0.0/8 64511
172.16.0.0/12 64511
192.168.0.0/16 64511
cat aslocal.txt | as2bin /etc/dpi/aslocal.bin</code>
      - [[en:dpi:dpi_options:opt_statistics:statistics_asn#examples_for_ipv4|Examples for IPv4]]
      - [[en:dpi:dpi_options:opt_statistics:statistics_asn#examples_for_ipv6|Example for IPv6]]
    - Mark a given autonomous system as local:<code bash>vi my_as_dscp.txt
64511 local
10415 local
cat my_as_dscp.txt | as2dscp /etc/dpi/asnum.dscp</code> You can use either a custom AS or a public AS as the AS.\\ Read more  [[en:dpi:dpi_options:opt_priority:priority_config_as|at the link]]
  - A reload must be performed to apply the parameters:<code bash>service fastdpi reload</code>
=====Setting /etc/dpi/fastdpi.conf=====
    - Define the input and output interfaces in the configuration file.\\ The input interfaces to which the traffic mirror is fed are specified in the ''in_dev'' parameter, and the output interfaces are specified in ''out_dev''.\\ Interfaces do not form pairs and species constructs are allowed:<code bash>in_dev=05-00.0:05-00.1:05-00.2:05-00.3:0b-00.0:0b-00.1:0b-00.2:0b-00.3
out_dev=08-00.0:08-00.1:08-00.2:08-00.3</code> Or <code bash>in_dev=05-00.0
out_dev=out_dev=08-00.0:08-00.1:08-00.2:08-00.3</code>
    - Enable balancing mode in the ''enable_l2_lb'' parameter, where:
      * ''0'' — deactivate balancing;
      * ''1'' — activate balancing.
    - Determine by what value to initialize the hash table in the ''lb_hash_out_dev_type'' parameter, where:
      * ''0'' — use the internal index of the output interface;
      * ''1'' — use the interface name from [in|out]_dev.
    - Select an engine to handle thread dispatchers in the ''dpdk_engine'' parameter, where:
      * ''0'' — read/write **default** engine, one dispatcher for everything;
      * ''1'' — read/write engine with two dispatcher threads: a dispatcher for each direction;
      * ''2'' — Read/write engine with RSS support: for each direction, ''dpdk_rss'' dispatchers are created (default ''dpdk_rss=2''), so total number of dispatchers = 2 * ''dpdk_rss''— to work with in_dev, and a separate dispatcher to work with out_dev.\\ When the parameter value is 2, the ''mqrx_lb_engine'' engine is activated. The principle of operation is the same as in the usual mode ''dpdk_engine=2'', only rss is enabled on in_dev, and only one rx queue is created on out_dev.\\ \\ Learn more about the ''dpdk_engine'' parameter by [[en:dpi:dpi_components:platform:dpi_config#the_dispatcher_thread_load|clicking here]].
    - The ''lb_hash_type'' parameter is used to select the hashing algorithm. Currently, the maglev algorithm is supported (parameter value ''0'') — an algorithm with a fixed-size hash table. The hash for load balancing is calculated as follows:
      * if both src and dst IPs are local, the hash is calculated based on these two addresses;
      * if only the src IP is local, the hash is calculated based on the src IP;
      * if only the dst IP is local, the hash is calculated based on the dst IP;
      * otherwise, the hash is calculated based on src and dst IPs.\\ \\ The calculated hash value is then used to determine the output interface by finding the index of the hash table cell that contains the interface index from the array of output interfaces.