doc/figures/sai_srv6_encap_model.gv

// SAI SRv6 Encap model Graphviz file
// To generate the diagram use below command:
//      dot -Tpng  sai_srv6_encap_model.gv -o sai_srv6_encap_model.png

digraph g {
    fontname="Helvetica,Arial,sans-serif"
    node [fontname="Helvetica,Arial,sans-serif"]
    edge [fontname="Helvetica,Arial,sans-serif"]
    graph [
        rankdir = "LR"
    ];
    node [
        fontsize = "16"
    ];
    edge [
    ];

    subgraph cluster_vrf {
        "VRF_a_route_table_label" [ label = <VRF-A Route table>
            style = "filled,setlinewidth(5)"
            fillcolor = "#91b5c9"
            shape = box
            width = 2.2
        ]

        "Route_10_0_0_0" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD colspan="2" BGCOLOR="palegreen" PORT="title">SAI Route</TD></TR>
              <tr><td>Prefix</td><td>10.0.0.0/8</td></tr>
              <tr><td>VRF</td><td>VRF-A</td></tr>
              <tr><td BGCOLOR="tomato">Prefix Agg ID</td><td BGCOLOR="tomato">10</td></tr>
              <tr><td>Prefix</td><td port="nexthop">Overlay NHG1</td></tr>
            </TABLE>
            >
            shape = plaintext
        ]
        "Route_12_0_0_0" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD colspan="2" BGCOLOR="palegreen" PORT="title">SAI Route</TD></TR>
              <tr><td>Prefix</td><td>12.0.0.0/8</td></tr>
              <tr><td>VRF</td><td>VRF-A</td></tr>
              <tr><td BGCOLOR="tomato">Prefix Agg ID</td><td BGCOLOR="tomato">20</td></tr>
              <tr><td>Prefix</td><td port="nexthop">SRv6 NH1</td></tr>
            </TABLE>
            >
            shape = plaintext
        ]
    }

    "Route_10_0_0_0":nexthop -> "l1_nhg1":ecmp_group
    "Route_12_0_0_0":nexthop -> "srv6_nh1":nexthop

    subgraph cluster_l1_ecmp {
        // rank = same
        label = <Overlay Next hop group>
        "l1_nhg1" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD PORT="ecmp_group" BGCOLOR="palegreen">L1 ECMP Group</TD></TR>
              <tr><td BGCOLOR="black"></td></tr>
              <TR><TD BGCOLOR="skyblue" PORT="nh_mbr_id">NHG member list</TD></TR>
              <tr><td port="nh2">SRv6 NH2</td></tr>
              <tr><td port="nh1">SRv6 NH1</td></tr>
            </TABLE>
            >
            shape = plaintext
        ]
    }

    subgraph cluster_srv6_nh {
        rank = same
        "srv6_nh1" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD PORT="nexthop" BGCOLOR="palegreen">SRv6 NH1</TD></TR>
              <TR><TD>Nexthop OID</TD></TR>
              <TR><TD PORT="tunnel">NODE_21 Tunnel OID</TD></TR>
              <TR><TD PORT="sidlist">SIDList OID1</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]

        "srv6_nh2" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD PORT="nexthop" BGCOLOR="palegreen">SRv6 NH2</TD></TR>
              <TR><TD>Nexthop OID</TD></TR>
              <TR><TD PORT="tunnel">NODE_22 Tunnel OID</TD></TR>
              <TR><TD PORT="sidlist">SIDList OID2</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]
    }

    "l1_nhg1":nh1 -> "srv6_nh1":nexthop
    "l1_nhg1":nh2 -> "srv6_nh2":nexthop
    "srv6_nh1":tunnel -> "node21-tunnel":tunnel
    "srv6_nh2":tunnel -> "node22-tunnel":tunnel

    subgraph cluster_tunnel {
        rank = same
        "node21-tunnel" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD PORT="tunnel" BGCOLOR="palegreen">SAI Tunnel<br/>NODE_21 Endpoint</TD></TR>
              <TR><TD>Tunnel OID</TD></TR>
              <TR><TD PORT="mapper">Encap mapper</TD></TR>
              <TR><TD>Encap SRC IP</TD></TR>
              <TR><TD>Type = P2P</TD></TR>
              <TR><TD>Encap DST IP</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]
        "node21-encap_mapper" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD colspan="2" PORT="mapper" BGCOLOR="palegreen">Encap Mapper</TD></TR>
              <TR><TD colspan="2">Encap Mapper OID 1</TD></TR>
              <tr><td colspan="2" BGCOLOR="black"></td></tr>
              <TR><TD BGCOLOR="skyblue" colspan="3">PrefixID to VPNSID</TD></TR>
              <TR><TD BGCOLOR="tomato">10</TD><TD PORT="sidlist1" BGCOLOR="tomato">VPN SID1</TD></TR>
              <TR><TD BGCOLOR="tomato">20</TD><TD PORT="sidlist2" BGCOLOR="tomato">VPN SID2</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]
        "node21-tunnel":mapper -> "node21-encap_mapper":mapper 

        "node22-tunnel" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD PORT="tunnel" BGCOLOR="palegreen">SAI Tunnel<br/>NODE_22 Endpoint</TD></TR>
              <TR><TD>Tunnel OID</TD></TR>
              <TR><TD PORT="mapper">Encap mapper</TD></TR>
              <TR><TD>Encap SRC IP</TD></TR>
              <TR><TD>Encap DST IP</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]
        "node22-encap_mapper" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD colspan="2" PORT="mapper" BGCOLOR="palegreen">Encap Mapper</TD></TR>
              <TR><TD colspan="2">Encap Mapper OID 2</TD></TR>
              <tr><td colspan="2" BGCOLOR="black"></td></tr>
              <TR><TD BGCOLOR="skyblue" colspan="3">PrefixID to VPNSID</TD></TR>
              <TR><TD BGCOLOR="tomato">10</TD><TD PORT="sidlist1" BGCOLOR="tomato">VPN SID3</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]
        "node22-tunnel":mapper -> "node22-encap_mapper":mapper 
    }

    subgraph sidlist_block {
        label = <SID Lists>
        rank = same

        "SID_List1" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD colspan="2" BGCOLOR="palegreen" PORT="title">SAI SIDList 1</TD></TR>
              <TR><TD>SID</TD><TD>IPv6 address list</TD></TR>
              <TR><TD BGCOLOR="tomato">Underlay NH</TD><TD BGCOLOR="tomato">IP NH_OID</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]
        "SID_List2" [
            label = <
            <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
              <TR><TD colspan="2" BGCOLOR="palegreen" PORT="title">SAI SIDList 2</TD></TR>
              <TR><TD>SID</TD><TD>IPv6 address list</TD></TR>
              <TR><TD BGCOLOR="tomato">Underlay NH</TD><TD BGCOLOR="tomato">Unspecified</TD></TR>
            </TABLE>
            >
            shape = plaintext
        ]
    }
    "srv6_nh1":sidlist -> "SID_List1":title
    "srv6_nh2":sidlist -> "SID_List2":title
}