MAPT in RDK-B BPI R4

Introduction 

MAP-T (RFC 7599) is a stateless IPv4/IPv6 transition mechanism that enables IPv4 services over an IPv6-only network using algorithmic translation.

Translation happens at:

•    MAP Customer Edge (CE): A device functioning as a Customer Edge
                             router in a MAP deployment.  A typical MAP CE
                             adopting MAP Rules will serve a residential
                             site with one WAN-side IPv6-addressed
                             interface and one or more LAN-side interfaces
                             addressed using private IPv4 addressing.
  
     MAP Border Relay (BR):  A MAP-enabled router managed by the service
                             provider at the edge of a MAP domain.  A BR
                             has at least an IPv6-enabled interface and an
                             IPv4 interface connected to the native IPv4
                             network.  A MAP BR may also be referred to as
                             simply a "BR" within the context of MAP.

MAP-T High-Level Architecture

MAPT Configuration

Customer Edge: Enable/Disable MAPT feature with below distro's from build

DISTRO_FEATURES_append = " feature_mapt"
DISTRO_FEATURES_append = " nat46"

Border Relay: Setup done in ubuntu machine ( linux kernel 5.15 )

Installation

1. sudo apt-get install isc-dhcp-server
2. Open file /etc/dhcp/dhcpd.conf and update as below
   
   dhcp.conf

   ddns-update-style none;
   default-lease-time 3600;
   max-lease-time 7200;
   authoritative;
   option custom-upstream-rate code 242 = unsigned integer 32;
   option custom-downstream-rate code 243 = unsigned integer 32;

   option domain-name "hsd.pa.crnrstn.comcast.net" ;

   subnet 10.42.0.0 netmask 255.255.255.0 {
       option routers 10.42.0.10;
       option broadcast-address 10.42.0.255;
       option domain-name-servers 1.1.1.1, 8.8.8.8;
       range 10.42.0.3 10.42.0.254;

   }

   
   
3. Open file /etc/radvd.conf
   
   radvd.conf

   interface eth1 {
       AdvSendAdvert on;
       AdvManagedFlag on;
       AdvOtherConfigFlag on;

       prefix 2001:558:6013:100::/64 {
           AdvOnLink on;
           AdvAutonomous on;
       };

   };

4. Open file  /etc/dhcp/dhcpd6.conf and update as below  
   dhcp6.conf

   ddns-update-style none;
   default-lease-time 3600;
   max-lease-time 7200;
   option dhcp-renewal-time 1800;
   option dhcp-rebinding-time 2880;
   option client-class-information code 97 = string;
   authoritative;
   option dhcp6.map-option code 95 = string;
   subnet6 2001:558:6013:0100::/64 {
       range6 2001:558:6013:0100::1000 2001:558:6013:0100::1fff;
       prefix6 2001:558:6013:0100:: 2001:558:6013:fe00:: /56;
       option dhcp6.map-option 00:59:00:16:00:08:18:c0:a8:14:00:30:20:01:05:58:60:13:00:5d:00:04:08:08:00:00:00:5b:00:09:40:00:64:ff:9b:00:00:00:00;
       option dhcp6.name-servers
       2001:4860:4860::8888,
       2001:4860:4860::8844;
   }

Datamodels

root@Filogic-GW:~# dmcli eRT getv Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.
CR component name is: eRT.com.cisco.spvtg.ccsp.CR
subsystem_prefix eRT.
Execution succeed.
Parameter    1 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapTransportMode
               type:     string,    value: MAPT 
Parameter    2 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapBRPrefix
               type:     string,    value: 64:ff9b::/64 
Parameter    3 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapRuleIPv4Prefix
               type:     string,    value: 192.168.20.0 
Parameter    4 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapRuleIPv6Prefix
               type:     string,    value: 2001:558:6013::/48 
Parameter    5 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapEALen
               type:       uint,    value: 8 
Parameter    6 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapPSIDOffset
               type:       uint,    value: 8 
Parameter    7 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapPSIDLen
               type:       uint,    value: 8 
Parameter    8 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapPSID
               type:       uint,    value: 0 
Parameter    9 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapIsFMR
               type:       bool,    value: false 
Parameter   10 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapIpv4Address
               type:     string,    value: 192.168.20.254 
Parameter   11 name: Device.DHCPv6.Client.1.X_RDKCENTRAL-COM_RcvOption.MapRatio
               type:       uint,    value: 1