Priority assignment depending on the directions [Документация VAS Experts]
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    en:dpi:dpi_options:opt_priority:priority_config_as [2020/02/05 17:30] – ↷ Page moved from en:dpi:dpi_options:base_functionality:opt_priority:priority_config_as to en:dpi:dpi_options:opt_priority:priority_config_as lexx26en:dpi:dpi_options:opt_priority:priority_config_as [2025/01/16 10:39] (current) – [Priority assignment depending on the directions] elena.krasnobryzh
    Line 1: Line 1:
    -====== Assignment of priorities vs directions ======+====== Priority assignment depending on the directions ====== 
     +{{indexmenu_n>4}} 
     +The direction is defined by a number of an autonomous system that sends or receives the traffic.  
     +:!: The direction priority specified for autonomous system (if defined) overrides the priority specified by protocol. 
     +:!: The direction priority specified for the traffic's source (if defined) overrides the priority specified for the destination.
      
     +<note important>One can change the IP list that belongs to an autonomous system and define an auxiliary autonomous system dynamically. It is described in the section [[en:dpi:dpi_options:opt_statistics:statistics_asn|Configuring autonomous systems]]</note>
     +
     +The direction dependent priorities assigned by the system's administrator, are loaded by DPI from the file **/etc/dpi/asnum.dscp.**
     +
     +<note warning>Comments in this file are not allowed!</note>
     +
     +This file is created in two steps. First, the text file with a list of autonomous systems and their assigned priorities is created. Next, this file is converted into an internal format by a dedicated utility.
     +
     +<note tip>''asnum.bin'' — a directory of public autonomous systems and subnets that can be updated from the cloud. To enable directory updates, add the parameter ''asnum_download=1'' to the configuration file ''/etc/dpi/fastdpi.conf''. By default, updates are disabled (''asnum_download=0'').</note>
     +===== File format of autonomous systems' list and their priorities: =====
     +
     +Each line of the file contains: AS_number <space> dscp_value. **For example:**
     +<code>
     +64512       cs0
     +64512       local
     +64513       drop
     +64514       pass
     +64514       peer
     +</code>
     +  * Here cs0 - is [[en:dpi:dpi_options:opt_priority:dscp_table|DSCP value]].\\ 
     +
     +Keywords meaning:
     +  * drop – means that packets have not to be transmitted: they must be dropped.
     +  * pass – the traffic of this autonomous system must go through DPI with no analysis and processing.
     +  * local – the traffic of this system is treated as a local operator's one, see [[en:dpi:bras_bng:general_setup#fastdpi_l3_bras_setup|BRAS L3]]
     +  * peer – the operator is in peering state with this system; used only for [[en:dpi:dpi_options:opt_cache|Cache option]]
     +  * term – termination is allowed for this AS; see [[en:dpi:bras_bng:bras_l2_vlan_term:bras_l2_vlan_term_as|BRAS: AS termination]]
     +  * mark1 – Prioritize SNI detection in custom signatures for autonomous systems.\\ Control from the cloud. 
     +  * mark2 – QUIC traffic without SNI from this AS will be marked as QUIC_UNKNOWN_MARKED\\ Example:\\  
     +    * in asnum.dscp ASN 15169 mark as mark2 
     +    * in protocols.dscp mark QUIC_UNKNOWN_MARKED drop
     +  * mark3 — reserved
     +
     +<note important>local, term and peer do not effect the traffic's priority and are used for services. They are described there.</note>
     +
     +===== File convertation =====
     +
     +To convert this file into the internal format and to place it into the working directory for DPI usage:
     +<code>cat my_as_dscp.txt|as2dscp /etc/dpi/asnum.dscp
     +service fastdpi reload
     +</code>
     +<note important>This configuration is loaded on the run, with no need to restart the servic</note>
     +<note>**[SSG v13+]** it is now possible to add comments (#) and empty lines in input files of as2dscp utility.</note>
     +
     +===== Configuration for local traffic =====
     +To allow the transit of local operator traffic through the DPI without analysing and processing:
     +<code>local_passthrough=1</code>
     +
     +To place the local operator traffic in a separate class:
     +<code>local_dscp=0x38</code> 
     +dscp is set in a numerical form, the [[en:dpi:dpi_options:opt_priority:dscp_table|reference table]] provides correspondence between the numeric and letter symbols.\\ 
     +
     +<note important>local_dscp setting takes precedence over the local_passthrough (if both are specified, the local_dscp is active)</note>
     +
     +Autonomous system traffic within its class [[en:dpi:dpi_options:opt_bandwidth_mgmt:bandwidth_conf|can be limited]] regardless of the basic service plan limitation.