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RT-2.15: IS-IS Graceful Restart Helper

Summary

  • test verify isis garceful restarts support in helper role

Testbed type

Procedure

Initial Setup:

  • Connect:

  • DUT port-1 to ATE port-1

  • DUT port-2 to ATE port-2

  • Configure IPv4 and IPv6 addresses on DUT and ATE ports as shown below

    • DUT port-1 IPv4 address dp1-v4 = 192.168.1.1/30

    • ATE port-1 IPv4 address ap1-v4 = 192.168.1.2/30

    • DUT port-2 IPv4 address dp2-v4 = 192.168.1.5/30

    • ATE port-2 IPv4 address ap2-v4 = 192.168.1.6/30

    • DUT port-1 IPv6 address dp1-v6 = 2001:DB8::1/126

    • ATE port-1 IPv6 address ap1-v6 = 2001:DB8::2/126

    • DUT port-2 IPv6 address dp2-v6 = 2001:DB8::5/126

    • ATE port-2 IPv6 address ap2-v6 = 2001:DB8::6/126

  • Create an "target IPv4" network i.e. ipv4-network = 192.168.10.0/24 attached to ATE port-2 and inject it to ISIS.

  • Create an "target IPv6" network i.e. ipv6-network = 2024:db8:128:128::/64 attached to ATE port-2 and inject it to ISIS.

  • Configure ISIS

    • Configure separate ISIS emulated routers, one on each ATE ports-1, port-2

    • Enable IPv4 and IPv6 IS-IS L2 adjacency between ATE port-1 and DUT port-1, DUT port-2 and ATE port-2 in point-to-point mode.

      {
    "network-instances": {
        "network-instance": [
            {
                "name": "DEFAULT",
                "protocols": {
                    "protocol": [
                        {
                            "identifier": "ISIS",
                            "name": "DEFAULT",
                            "config": {
                                "name": "DEFAULT",
                                "identifier": "ISIS"
                            },
                            "isis": {
                                "global": {
                                    "afi-safi": {
                                        "af": [
                                            {
                                                "afi-name": "IPV4",
                                                "config": {
                                                    "afi-name": "IPV4",
                                                    "enabled": true,
                                                    "safi-name": "UNICAST"
                                                },
                                                "safi-name": "UNICAST"
                                            },
                                            {
                                                "afi-name": "IPV6",
                                                "config": {
                                                    "afi-name": "IPV6",
                                                    "enabled": true,
                                                    "safi-name": "UNICAST"
                                                },
                                                "safi-name": "UNICAST"
                                            }
                                        ]
                                    },
                                    "config": {
                                        "level-capability": "LEVEL_2",
                                        "net": [
                                            "<NET address of this WBB>"
                                        ]
                                    }
                                },
                                "interfaces": {
                                    "interface": [
                                        {
                                            "config": {
                                                "passive": true,
                                                "enabled": true,
                                                "interface-id": "Loopback0"
                                            },
                                            "interface-id": "Loopback0",
                                            "interface-ref": {
                                                "config": {
                                                    "interface": "loopback0",
                                                    "subinterface": 0
                                                }
                                            },
                                            "levels": {
                                                "level": [
                                                    {
                                                        "config": {
                                                            "level-number": 2,
                                                            "enabled": true
                                                        },
                                                        "level-number": 2
                                                    }
                                                ]
                                            }
                                        },
                                        {
                                            "config": {
                                                "circuit-type": "POINT_TO_POINT",
                                                "enabled": true,
                                                "interface-id": "<Interface_ID>"
                                            },
                                            "interface-id": "<Interface_ID>",
                                            "interface-ref": {
                                                "config": {
                                                    "interface": "<Interface name>",
                                                    "subinterface": 0
                                                }
                                            },
                                            "levels": {
                                                "level": [
                                                    {
                                                        "afi-safi": {
                                                            "af": [
                                                                {
                                                                    "afi-name": "IPV4",
                                                                    "config": {
                                                                        "afi-name": "IPV4",
                                                                        "metric": 10,
                                                                        "safi-name": "UNICAST"
                                                                    },
                                                                    "safi-name": "UNICAST"
                                                                },
                                                                {
                                                                    "afi-name": "IPV6",
                                                                    "config": {
                                                                        "afi-name": "IPV6",
                                                                        "metric": 10,
                                                                        "safi-name": "UNICAST"
                                                                    },
                                                                    "safi-name": "UNICAST"
                                                                }
                                                            ]
                                                        },
                                                        "config": {
                                                            "level-number": 2,
                                                            "enabled": true
                                                        },
                                                        "level-number": 2,
                                                        "timers": {
                                                            "config": {
                                                                "hello-interval": 10,
                                                                "hello-multiplier": 6
                                                            }
                                                        }
                                                    }
                                                ]
                                            }
                                        }
                                    ]
                                },
                                "levels": {
                                    "level": [
                                        {
                                            "config": {
                                                "level-number": 2,
                                                "metric-style": "WIDE_METRIC",
                                                "enabled": true
                                            },
                                            "level-number": 2
                                        }
                                    ]
                                }
                            }
                        }
                    ]
                }
            }
        ]
    }
}

    • Enable IPv4 and IPv6 IS-IS L2 adjacency between ATE port-1 and DUT port-1, DUT port-2 and ATE port-2 in point-to-point mode.\

    • Set ISIS graceful restart helper mode on DUT

      {
    "network-instances": {
        "network-instance": [
            {
                "name": "DEFAULT",
                "protocols": {
                    "protocol": [
                        {
                            "identifier": "ISIS",
                            "name": "DEFAULT",
                            "isis": {
                                "global": {
                                    "graceful-restart": {
                                        "config": {
                                            "enabled": true,
                                            "helper-only": true,
                                            "restart-time": 30
                                        }
                                    }
                                }
                            }
                        }
                    ]
                }
            }
        ]
    }
}

RT-2.15.1 [TODO: https://github.com/openconfig/featureprofiles/issues/2494]

GR helper

  • Generate traffic form ATE port-1 to "target IPv4" and "target IPv6" networks (ATE port-2)
  • Verify traffic is recived on ATE port-2
  • Restart ISIS on ATE port-2 (Alternativly: using set_control_state to "down" for emulated isis router. Wait (restart-time - 10) sec and set it back to "up")
  • Verify traffic is recived on ATE port-2 during restart time ( no losses )
  • Disable ISIS on ATE port-2 (set_control_state to "down"). Wait restart-time seconds
  • Verify traffic is NOT recived on ATE port-2 (after restart-time expires)

OpenConfig Path and RPC Coverage

The below yaml defines the OC paths intended to be covered by this test. OC paths used for test setup are not listed here.

paths:
  ## Config Paths ##
  /network-instances/network-instance/protocols/protocol/isis/global/graceful-restart/config/enabled:
  /network-instances/network-instance/protocols/protocol/isis/global/graceful-restart/config/helper-only:
  /network-instances/network-instance/protocols/protocol/isis/global/graceful-restart/config/restart-time:
  
rpcs:
  gnmi:
    gNMI.Subscribe:
    gNMI.Set:

Required DUT platform

  • FFF
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