Create a policy-forwarding configuration using gNMI with action set-ip-ttl.

• featureprofiles/topologies/atedut_2.testbed

TODO: Complete test environment setup steps

inner_ipv6_dst_A = "2001:aa:bb::1/128" inner_ipv6_dst_B = "2001:aa:bb::2/128" inner_ipv6_default = "::/0"

ipv4_inner_dst_A = "10.5.1.1/32" ipv4_inner_dst_B = "10.5.1.2/32" ipv4_inner_default = "0.0.0.0/0"

outer_ipv6_src = "2001:f:a:1::0" outer_ipv6_dst_A = "2001:f:c:e::1" outer_ipv6_dst_B = "2001:f:c:e::2" outer_ipv6_dst_def = "2001:1:1:1::0" outer_dst_udp_port = "6635" outer_dscp = "26" outer_ip-ttl = "64"

[TODO] Test code needs to be implemented.

Canonical OpenConfig for policy forwarding, matching IP prefix and TTL = 1 with action set inner packet TTL = 1.

{
  "openconfig-network-instance": {
    "network-instances": [
      {
        "afts": {
          "policy-forwarding": {
            "policies": [
              {
                "config": {
                  "policy-id": "retain ttl",
                  "type": "PBR_POLICY"
                },
                "policy": "retain ttl",
                "rules": [
                  {
                    "config": {
                      "sequence-id": 1,
                    },
                    "ipv6": {
                      "config": {
                        "destination-address": "router_ip"
                        "hop-limit": 1
                      }
                    },
                    "action": {
                      "set-ip-ttl": 1  #TODO: Add set-ip-ttl [https://github.com/openconfig/public/pull/1263/files]
                     }
                  }
                ]
              }
            ]  
          }
        }
      }
    ]
  }
}

• Push the gNMI the policy forwarding configuration
• Push the configuration to DUT using gnmi.Set with REPLACE option
• Send traffic from ATE port 1 to DUT port 1 with inner packet TTL as 1.
• Using OTG, validate ATE port 2 receives MPLS-IN-GRE packets
  • Validate destination IPs are outer_ipv6_dst_A and outer_ipv6_dst_B
  • Validate MPLS label is set
  • Validate inner packet ttl as 1.
  • Validate outer packet ttl to be "outer_ip-ttl"

paths:

  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/config/destination-address:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/config/hop-limit:

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

• FFF