This is to test the forwarding functionality of MPLS traffic with the Explicit Null label on an Egress node in SRTE+MPLS enabled network.

The tests validate that the DUT performs the following actions -

• DUT is an egress node in SRTE+MPLS network.
• DUT will receive traffic with MPLS Explicit Null label 0 and label 2 for IPv4 and IPv6 destination respectively.
• DUT will pop the MPLS label and perform IPv4 and IPv6 forwarding.

• featureprofiles/topologies/atedut_2.testbed

• Create the following connections:
• DUT has ingress and egress port connected to the ATE.

graph LR; 
A[ATE:Port1] --Ingress--> B[Port1:DUT:Port2];B --Egress--> C[Port2:ATE];

• ATE Port 1 hosted prefixes:

  • ATE-Port1 IPv4 address = ATE-P1-Address
  • Additional Source Address = IPV4-SRC1
  • Additional Source Address = IPV6-SRC1

• ATE Port 2 hosted prefixes:

  • ATE-Port2 IPv4 address = ATE-P2-Address
  • Additional destination address = IPV4-DST1
  • Additional destination address = IPV6-DST1

• ATE Port 1 generates below flow types:

• Flow type 1: Ethernet+MPLS+IPv4+Payload

• For the Ethernet Header:

  • Source MAC address: Unicast Ethernet MAC
  • Destination MAC address: DUT-Port1 mac address

• For MPLS header:

  • MPLS label 0
  • EXP set to 0
  • S set to 1
  • TTL set to 64

• For the IP header:

  • Source IP and Destination IP will be IPV4-SRC1 and IPV4-DST1 respectively.
  • Protocol will be TCP and UDP and source port (> 1024) and destination port will be 443.

• Flow type 2: Ethernet+MPLS+IPv6+Payload

• For the Ethernet Header:

  • Source MAC address: Unicast Ethernet MAC
  • Destination MAC address: DUT-Port1 mac address

• For MPLS header:

  • MPLS label 2
  • EXP set to 0
  • S set to 1
  • TTL set to 64

• For the IPv6 header:

  • Source IP and Destination IP will be IPV6-SRC1 and IPV6-DST1 respectively.
  • Protocol will be TCP and UDP and source port (> 1024) and destination port will be 443.

• Configure Segment Routing Global Block (srgb) lower-bound: 400000 upper-bound: 465000)
• Enable MPLS forwarding.
• DUT will have a static IPv4 and IPv6 route for IPV4-DST1 / IPV6-DST1 towards ATE Port2.

Verify that:

• ATE Port1 will send IPv4 and IPv6 traffic.
• DUT will POP MPLS label 0, decrement the TTL from 64 to 63, and perform IPv4 lookup for the destination and forward IPv4 traffic.
• DUT will POP MPLS label 2, decrement the TTL from 64 to 63, and perform IPv6 lookup for the destination and forward IPv6 traffic.
• Validate the ingress and egress counter and ensure that there is no drop in the traffic.

{
  "openconfig-network-instance:network-instances": {
    "network-instance": [
      {
        "config": {
          "name": "DEFAULT",
          "type": "openconfig-network-instance-types:DEFAULT_INSTANCE"
        },
        "mpls": {
          "global": {
            "reserved-label-blocks": {
              "reserved-label-block": [
                {
                  "config": {
                    "local-id": "srlb",
                    "lower-bound": 16
                  },
                  "local-id": "srlb"
                },
                {
                  "config": {
                    "local-id": "isis-sr",
                    "lower-bound": 400000,
                    "upper-bound": 465000
                  },
                  "local-id": "isis-sr"
                }
              ]
            }
          }
        },
        "name": "DEFAULT",
        "protocols": {
          "protocol": [
            {
              "identifier": "openconfig-policy-types:ISIS",
              "name": "isis",
              "config": {
                "identifier": "openconfig-policy-types:ISIS",
                "name": "isis"
              },
              "isis": {
                "global": {
                  "segment-routing": {
                    "config": {
                      "enabled": true,
                      "srgb": "isis-sr",
                      "srlb": "srlb"
                    }
                  }
                }
              }
            }
          ]
        },
        "segment-routing": {
          "srgbs": {
            "srgb": [
              {
                "config": {
                  "dataplane-type": "MPLS",
                  "local-id": "isis-sr",
                  "mpls-label-blocks": [
                    "isis-sr"
                  ]
                },
                "local-id": "isis-sr"
              }
            ]
          },
          "srlbs": {
            "srlb": [
              {
                "config": {
                  "dataplane-type": "MPLS",
                  "local-id": "srlb",
                  "mpls-label-block": "srlb"
                },
                "local-id": "srlb"
              }
            ]
          }
        }
      }
    ]
  }
}

paths:
  # Config
  /network-instances/network-instance/mpls/global/reserved-label-blocks/reserved-label-block/state/upper-bound:
  /network-instances/network-instance/segment-routing/srgbs/srgb/local-id:
  /network-instances/network-instance/protocols/protocol/state/identifier:
  /network-instances/network-instance/protocols/protocol/isis/global/segment-routing/state/srgb:
  /network-instances/network-instance/segment-routing/srlbs/srlb/state/local-id:
  /network-instances/network-instance/segment-routing/srlbs/srlb/state/dataplane-type:
  /network-instances/network-instance/state/type:
  /network-instances/network-instance/protocols/protocol/identifier:
  /network-instances/network-instance/protocols/protocol/state/name:
  /network-instances/network-instance/segment-routing/srgbs/srgb/state/dataplane-type:
  /network-instances/network-instance/name:
  /network-instances/network-instance/protocols/protocol/isis/global/segment-routing/state/srlb:
  /network-instances/network-instance/mpls/global/reserved-label-blocks/reserved-label-block/state/lower-bound:
  /network-instances/network-instance/protocols/protocol/isis/global/segment-routing/state/enabled:
  /network-instances/network-instance/segment-routing/srgbs/srgb/state/mpls-label-blocks:
  /network-instances/network-instance/segment-routing/srlbs/srlb/local-id:
  /network-instances/network-instance/mpls/global/reserved-label-blocks/reserved-label-block/local-id:
  /network-instances/network-instance/state/name:
  /network-instances/network-instance/segment-routing/srgbs/srgb/state/local-id:
  /network-instances/network-instance/segment-routing/srlbs/srlb/state/mpls-label-block:
  /network-instances/network-instance/mpls/global/reserved-label-blocks/reserved-label-block/state/local-id:


  # Telemetry
  /network-instances/network-instance/mpls/signaling-protocols/segment-routing/aggregate-sid-counters/aggregate-sid-counter/state/in-pkts:
  /network-instances/network-instance/mpls/signaling-protocols/segment-routing/aggregate-sid-counters/aggregate-sid-counter/state/out-pkts:

rpcs:
  gnmi:
    gNMI.Set:
      union_replace: true
      replace: true
    gNMI.Subscribe:
      on_change: true

• FFF
• MFF