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PF-1.9: Egress handling of TTL

Summary

This test verifies TTL handling for egress flows.

Testbed Type

Procedure

Test environment setup

  • DUT has one ingress port and one egress port, both connected to ATE.

                              -------
                         |       |
      [ ATE:Port1 ] ---- |  DUT  | ---- [ ATE:Port2 ]
                         |       |
                          -------

  • Routes are advertised from ATE:Port2.

  • Traffic is generated from ATE:Port1.

  • ATE:Port2 is used as the destination port for flows.

  • IPv4-DST-DECAP is 10.2.2.2

  • Frame size for packets generated from ATE:Port1 is 128 bytes

Configuration

  1. DUT:Port1 is configured as Singleton IP interface towards ATE:Port1.

  2. DUT:Port2 is configured as Singleton IP interface towards ATE:Port2.

  3. DUT is configured witht he following interface IPs

    • DUT:Port1:IPv4 is 192.168.10.2/30
    • DUT:Port1:IPv6 is 2001:DB8::192:168:10:2/126
    • DUT:Port2:IPv4 is 192.168.20.2/30
    • DUT:POrt2:IPv6 is 2001:DB8::192:168:20:2/126

  4. ATE is configured witht he following interface IPs

    • ATE:Port1:IPv4 is 192.168.10.1/30
    • ATE:Port1:IPv6 is 2001:DB8::192:168:10:1/126
    • ATE:Port2:IPv4 is 192.168.20.1/30
    • ATE:Port2:IPv6 is 2001:DB8::192:168:20:1/126

  5. DUT is configured to decapsulate packets destined to IPv4-DST-DECAP/32

  6. DUT is configured with static LSP with label 100010 pointing to ATE:Port2:IPv4 address. This should be used for encapsulated packets with inner IPv4.

  7. DUT is configured with static LSP with label 100020 pointing to ATE:Port2:IPv6 address. This should be used for encapsulated packets with inner IPv6.

PF-1.9.1: IPv4 non-encapsulated traffic with TTL = 10.

ATE action:

  • Generate 5 IPv4 packets from ATE:Port1 to ATE:Port2:IPv4.
    • Set TTL of all packets to 10.

Verify:

  • DUT interface DUT:Port1 in-unicast-pkts counters equals the number of packets generated from ATE:Port1.
  • DUT interface DUT:Port2 out-unicast-pkts counters equals the number of packets generated from ATE:Port1.
  • The packet count of traffic received on ATE:Port2 should be equal to the packets generated from ATE:Port1.
  • TTL for all packets received on ATE:Port2 should be 9.

PF-1.9.2: IPv6 non-encapsulated traffic with TTL = 10.

  • Repeat PF-1.9.1 with ATE generating IPv6 packets ATE:Port2:IPv6.

PF-1.9.3: IPv4 non-encapsulated traffic with TTL = 1.

ATE action:

  • Generate 5 IPv4 packets from ATE:Port1 to ATE:Port2:IPv4.
    • Set TTL of all packets to 1.

Verify:

  • DUT interface DUT:Port1 in-unicast-pkts counters equals the number of packets generated from ATE:Port1.
  • ATE:Port1 received ICMP TTL Exceeded packets for all packets sent.

PF-1.9.4: IPv6 non-encapsulated traffic with TTL = 1.

  • Repeat PF-1.9.3 with ATE generating IPv6 packets ATE:Port2:IPv6.

PF-1.9.5: IPv4oGRE traffic with inner TTL = 10 and outer TTL = 30.

ATE action:

  • Generate 5 IPv4oGRE packets from ATE:Port1 with below headers.
    • Set the inner IP header destination to ATE:Port2:IPv4.
    • Set the inner IP header TTL to 10.
    • Set the outer IP header destination to IPv4-DST-DECAP/32.
    • Set the outer IP header TTL to 30.

Verify:

  • Perform same verifications in PF-1.9.1.
  • Verify that decapsulation rule counters match the number of packets from ATE:Port1.

PF-1.9.6: IPv6oGRE traffic with inner TTL = 10 and outer TTL = 30.

  • Repeat PF-1.9.5 using IPv6oGRE with inner header destination IP of ATE:Port2:IPv6.

PF-1.9.7: IPv4oGRE traffic with inner TTL = 1 and outer TTL = 30.

ATE action:

  • Generate 5 IPv4oGRE packets from ATE:Port1 with below header settings.
    • Set the inner IP header destination to ATE:Port2:IPv4.
    • Set the inner IP header TTL to 1.
    • Set the outer IP header destination to IPv4-DST-DECAP/32.
    • Set the outer IP header TTL to 30.

Verify:

  • DUT interface DUT:Port1 in-unicast-pkts counters equals the number of packets generated from ATE:Port1.
  • ATE:Port1 received ICMP TTL Exceeded packets for all packets sent.

PF-1.9.8: IPv6oGRE traffic with inner TTL = 1 and outer TTL = 30.

  • Repeat PF-1.9.7 using IPv6oGRE with inner header destination IP of ATE:Port2:IPv6.

PF-1.9.9: IPv4oGRE traffic with inner TTL = 10 and outer TTL = 1.

ATE action:

  • Generate 5 IPv4oGRE packets from ATE:Port1 with below header settings.
    • Set the inner IP header destination to ATE:Port2:IPv4.
    • Set the inner IP header TTL to 10.
    • Set the outer IP header destination to IPv4-DST-DECAP/32.
    • Set the outer IP header TTL to 1.

Verify:

  • Perform same verifications in PF-1.9.1.
  • Verify that decapsulation rules counter match number of packets from ATE:Port1.

PF-1.9.10: IPv6oGRE traffic with inner TTL = 10 and outer TTL = 1.

  • Repeat PF-1.9.9 using IPv6oGRE with inner header destination IP of ATE:Port2:IPv6.

PF-1.9.11: IPv4oMPLSoGRE traffic with inner TTL = 10, MPLS TTL = 20 and outer TTL = 30.

ATE action:

  • Generate 5 IPv4oMPLSoGRE packets from ATE:Port1 with below headers settings.
    • Set the inner IP header destination to ATE:Port2:IPv4.
    • Set the inner IP header TTL to 10.
    • Set the MPLS label to 100010.
    • Set the MPLS TTL to 20.
    • Set the outer IP header destination to IPv4-DST-DECAP/32.
    • Set the outer IP header TTL to 30.

Verify:

  • DUT interface DUT:Port1 in-unicast-pkts counters equals the number of packets generated from ATE:Port1.
  • DUT interface DUT:Port2 out-unicast-pkts counters equals the number of packets generated from ATE:Port1.
  • The packet count of traffic received on ATE:Port2 should be equal to the packets generated from ATE:Port1.
  • Verify that decapsulation rule counters match number of packets from ATE:Port1.
  • TTL for all packets received on ATE:Port2 should 10.

PF-1.9.12: IPv6oMPLSoGRE traffic with inner TTL = 10, MPLS TTL = 20 and outer TTL = 30.

  • Repeat PF-1.9.11 using IPv6oMPLSoGRE with inner header destination IP of ATE:Port2:IPv6 and MPLS label of 100020.

PF-1.9.13: IPv4oMPLSoGRE traffic with inner TTL = 1, MPLS TTL = 20 and outer TTL = 30.

ATE action:

  • Generate 5 IPv4oMPLSoGRE packets from ATE:Port1 with below headers settings.
    • Set the inner IP header destination to ATE:Port2:IPv4.
    • Set the inner IP header TTL to 1.
    • Set the MPLS label to 100010.
    • Set the MPLS TTL to 20.
    • Set the outer IP header destination to IPv4-DST-DECAP/32.
    • Set the outer IP header TTL to 30.

Verify:

  • Perform same verifications in PF-1.9.11.

PF-1.9.14: IPv6oMPLSoGRE traffic with inner TTL = 1, MPLS TTL = 20 and outer TTL = 30.

  • Repeat PF-1.9.11 using IPv6oMPLSoGRE with inner header destination IP of ATE:Port2:IPv6 and MPLS label of 100020.

PF-1.9.15: IPv4oMPLSoGRE traffic with inner TTL = 10, MPLS TTL = 1 and outer TTL = 30.

ATE action:

  • Generate 5 IPv4oMPLSoGRE packets from ATE:Port1 with below headers settings.
    • Set the inner IP header destination to ATE:Port2:IPv4.
    • Set the inner IP header TTL to 10.
    • Set the MPLS label to 100010.
    • Set the MPLS TTL to 1.
    • Set the outer IP header destination to IPv4-DST-DECAP/32.
    • Set the outer IP header TTL to 30.

Verify:

  • DUT interface DUT:Port1 in-unicast-pkts counters equals the number of packets generated from ATE:Port1.
  • ATE:Port1 received ICMP TTL Exceeded packets for all packets sent.

PF-1.9.16: IPv6oMPLSoGRE traffic with inner TTL = 10, MPLS TTL = 1 and outer TTL = 30.

  • Repeat PF-1.9.15 using IPv6oMPLSoGRE with inner header destination IP of ATE:Port2:IPv6 and MPLS label of 100020.

PF-1.9.17: IPv4oUDP traffic with inner TTL = 10 and outer TTL = 30.

  • Repeat PF-1.9.5 using IPv4oUDP (GUE Variant 1)

PF-1.9.18: IPv6oUDP traffic with inner TTL = 10 and outer TTL = 30.

  • Repeat PF-1.9.6 using IPv6oUDP (GUE Variant 1)

PF-1.9.19: IPv4oUDP traffic with inner TTL = 1 and outer TTL = 30.

  • Repeat PF-1.9.7 using IPv4oUDP (GUE Variant 1)

PF-1.9.20: IPv6oUDP traffic with inner TTL = 1 and outer TTL = 30.

  • Repeat PF-1.9.8 using IPv6oUDP (GUE Variant 1)

PF-1.9.21: IPv4oUDP traffic with inner TTL = 10 and outer TTL = 1.

  • Repeat PF-1.9.9 using IPv4oUDP (GUE Variant 1)

PF-1.9.22: IPv6oUDP traffic with inner TTL = 10 and outer TTL = 1.

  • Repeat PF-1.9.10 using IPv6oUDP (GUE Variant 1)

PF-1.9.23: IPv4oMPLSoUDP traffic with inner TTL = 10, MPLS TTL = 20 and outer TTL = 30.

  • Repeat PF-1.9.11 using IPv4oMPLSoUDP (GUE Variant 1)

PF-1.9.24: IPv6oMPLSoUDP traffic with inner TTL = 10, MPLS TTL = 20 and outer TTL = 30.

  • Repeat PF-1.9.12 using IPv6oMPLSoUDP (GUE Variant 1)

PF-1.9.25: IPv4oMPLSoUDP traffic with inner TTL = 1, MPLS TTL = 20 and outer TTL = 30.

  • Repeat PF-1.9.13 using IPv4oMPLSoUDP (GUE Variant 1)

PF-1.9.26: IPv6oMPLSoUDP traffic with inner TTL = 1, MPLS TTL = 20 and outer TTL = 30.

  • Repeat PF-1.9.14 using IPv6oMPLSoUDP (GUE Variant 1)

PF-1.9.27: IPv4oMPLSoUDP traffic with inner TTL = 10, MPLS TTL = 1 and outer TTL = 30.

  • Repeat PF-1.9.15 using IPv6oMPLSoUDP (GUE Variant 1)

PF-1.9.28: IPv6oMPLSoUDP traffic with inner TTL = 10, MPLS TTL = 1 and outer TTL = 30.

  • Repeat PF-1.9.16 using IPv6oMPLSoUDP (GUE Variant 1)

Canonical OC

{
    "network-instances": {
        "network-instance": [
            {
                "name": "DEFAULT",
                "config": {
                    "name": "DEFAULT"
                },
                "mpls": {
                   "lsps": {
                      "static-lsps": {
                         "static-lsp": [
                            {
                               "config": {
                                  "name": "ipv4-static-lsp"
                               }
                               "egress": {
                                  "config": {
                                     "incoming-label": 100010
                                     "next-hop": "192.168.20.1"
                                  }
                               }
                            },
                            {
                               "config": {
                                  "name": "ipv6-static-lsp"
                               }
                               "egress": {
                                  "config": {
                                     "incoming-label": 100020
                                     "next-hop": "2001:DB8::192:168:20:1"
                                  }
                               }
                            }
                         ]
                      }
                   }
                }
                "policy-forwarding": {
                    "policies": {
                        "policy": [
                            {
                                "config": {
                                    "policy-id": "gre_decap"
                                },
                                "rules": {
                                    "rule": [
                                        {
                                            "sequence-id": 0
                                            "config": {
                                                "sequence-id": 0
                                            }
                                            "ipv4": {
                                                "config": {
                                                    "destination-address": "10.2.2.2"
                                                    "protocol": IP_GRE
                                                }
                                            },
                                            "action": {
                                                "config": {
                                                    "decapsulate-gre": true
                                                }
                                            }
                                        },
                                        {
                                            "sequence-id": 1
                                            "config": {
                                                "sequence-id": 1
                                            }
                                            "ipv4": {
                                                "config": {
                                                    "destination-address": "10.2.2.2"
                                                    "protocol": IP_UDP
                                                }
                                            },
                                            "transport": {
                                                "config": {
                                                    "destination-port": "6080"
                                                }
                                            },
                                            "action": {
                                                "config": {
                                                    "decapsulate-gue": true
                                                }
                                            }
                                        },
                                        {
                                            "sequence-id": 2
                                            "config": {
                                                "sequence-id": 2
                                            }
                                            "ipv4": {
                                                "config": {
                                                    "destination-address": "10.2.2.2"
                                                    "protocol": IP_UDP
                                                }
                                            },
                                            "transport": {
                                                "config": {
                                                    "destination-port": "6635"
                                                }
                                            },
                                            "action": {
                                                "config": {
                                                    "decapsulate-mpls-in-udp": true
                                                }
                                            }
                                        }
                                    ]
                                }
                            },
                        ]
                    }
                },
            }
        ]
    }
}

OpenConfig Path and RPC Coverage

paths:
  # Config
  /network-instances/network-instance/policy-forwarding/policies/policy/config/policy-id:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/config/sequence-id:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/config/destination-address:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/config/protocol:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/transport/config/destination-port:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/config/decapsulate-gre:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/config/decapsulate-gue:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/config/decapsulate-mpls-in-udp:

  /network-instances/network-instance/mpls/lsps/static-lsps/static-lsp/egress/config/incoming-label:
  /network-instances/network-instance/mpls/lsps/static-lsps/static-lsp/egress/config/next-hop:

  # Telemetry
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/state/matched-pkts:
  /network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/state/matched-octets:

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