basic_static_route_support_test

RT-1.26: Basic Static Route Support

Summary

This test validates the foundational routing capabilities for static routes on a DUT. It consolidates verification for:

• IPv4 and IPv6 static routes across DEFAULT, NON-DEFAULT, and MANAGEMENT network-instances.
• Cross-address family (XAF) next-hops (IPv4 route with IPv6 next-hop and vice-versa).
• Route properties: ECMP, metric, administrative distance (preference), and tags.
• Next-hop actions: DROP next-hops, invalid/blackhole next-hops, and disabling recursive next-hop resolution.
• Dynamic modifications: Adding and removing next-hops dynamically.

Testbed type

• featureprofiles/topologies/atedut_4.testbed

Procedure

Test environment setup

• Connect DUT port-1, port-2, port-3 and port-4 to ATE port-1, port-2, port-3 and port-4 respectively.
• Configure IPv4 and IPv6 addresses on DUT and ATE interfaces.
• Configure one IPv4 destination network ipv4-network = 203.0.113.0/24 connected to ATE port 1 and 2.
• Configure one IPv6 destination network ipv6-network = 2001:db8:128:128::/64 connected to ATE port 1 and 2.

RT-1.26.1 - Validate Static Route ECMP

• Step 1 - Configure IPv4 and IPv6 static routes for ECMP by setting the values at /network-instances/network-instance/protocols/protocol/static-routes/static/config/prefix and /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/next-hop:
  • Configure an IPv4 static route ipv4-route-a on the DUT for destination 203.0.113.0/24 with the next-hop set to the IPv4 address of ATE port-1.
  • Configure an IPv4 static route ipv4-route-b on the DUT for destination 203.0.113.0/24 with the next-hop set to the IPv4 address of ATE port-2.
  • Configure an IPv6 static route ipv6-route-a on the DUT for destination 2001:db8:128:128::/64 with the next-hop set to the IPv6 address of ATE port-1.
  • Configure an IPv6 static route ipv6-route-b on the DUT for destination 2001:db8:128:128::/64 with the next-hop set to the IPv6 address of ATE port-2.
• Step 2 - Push configuration to DUT using gnmi.Set with REPLACE option.
• Step 3 - Validate both routes are configured and reported correctly by checking that the value of /network-instances/network-instance/protocols/protocol/static-routes/static/state/prefix matches the configured prefixes.
• Step 4 - Send IPv4 and IPv6 Traffic from ATE port-3 towards destination 203.0.113.0/24 and 2001:db8:128:128::/64.
• Step 5 - Verify that traffic is received from DUT on both port-1 and port-2, confirming ECMP works.

RT-1.26.2 - Validate Static Route Metric

• Step 1 - Set the value of /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/metric to 100 for both ipv4-route-b and ipv6-route-b.
• Step 2 - Push configuration to DUT using gnmi.Set with REPLACE option.
• Step 3 - Validate that the metric is set correctly by checking that the value of /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/metric is 100.
• Step 4 - Send Traffic from ATE port-3 towards destinations.
• Step 5 - Verify that traffic is received from DUT on port-1 and NOT on port-2 (as route-b has a higher metric).

RT-1.26.3 - Validate Static Route Preference

• Step 1 - Set the value of /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/preference to 50 for both ipv4-route-a and ipv6-route-a.
• Step 2 - Push configuration to DUT.
• Step 3 - Validate that the preference is set correctly by checking that the value of /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/preference is 50.
• Step 4 - Send Traffic from ATE port-3 towards destinations.
• Step 5 - Verify that traffic is now received from DUT on port-2 and NOT on port-1 (as route-a has a higher preference value/lower priority).

RT-1.26.4 - Validate Static Route Tag

• Step 1 - Configure a tag of value 10 on the IPv4 and IPv6 static routes via /network-instances/network-instance/protocols/protocol/static-routes/static/config/set-tag.
• Step 2 - Push configuration to DUT.
• Step 3 - Validate the tag is set correctly by checking that the value of /network-instances/network-instance/protocols/protocol/static-routes/static/state/set-tag is 10.

RT-1.26.5 - Validate Cross-Address Family (XAF) Next-Hops

• Step 1 - Delete the configuration using a gNMI Set DELETE on the specific metric and preference paths for ipv4-route-b, ipv6-route-b, ipv4-route-a, and ipv6-route-a.
• Step 2 - Configure IPv6 static route 2001:db8:128:128::/64 with next-hops set to the IPv4 address of ATE port-1 and ATE port-2.
• Step 3 - Configure IPv4 static route 203.0.113.0/24 with next-hops set to the IPv6 address of ATE port-1 and ATE port-2.
• Step 4 - Push configuration to DUT.
• Step 5 - Validate the routes are configured and the cross-family next-hops are reported correctly by checking the next-hop IP addresses via /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/next-hop.
• Step 6 - Send Traffic from ATE port-3 towards both destinations.
• Step 7 - Verify that traffic is received from DUT on both port-1 and port-2 and ECMP works for both XAF routes.

RT-1.26.6 - Validate Static Route with DROP Next-Hop

• Step 1 - Configure an IPv4 static route for 203.0.113.0/24 by setting /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/next-hop to the OpenConfig local-defined-next-hop value DROP.
• Step 2 - Configure an IPv6 static route for 2001:db8:128:128::/64 by setting /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/next-hop to the OpenConfig local-defined-next-hop value DROP.
• Step 3 - Push configuration to DUT.
• Step 4 - Validate the route is configured and reported correctly.
• Step 5 - Send Traffic from ATE port-3 towards destinations.
• Step 6 - Verify that traffic is dropped on DUT and not received on port-1 and port-2.

RT-1.26.7 - Validate Disabling Recursive Next-Hop Resolution

• Step 1 - Configure IPv4 and IPv6 IS-IS between ATE port-1 <-> DUT port-1 and ATE port-2 <-> DUT port-2.
• Step 2 - Configure one IPv4 /32 host route (198.51.100.100/32) and one IPv6 /128 host route (2001:db8::64:64::1/128) connected to ATE and advertised to DUT through both IS-IS adjacencies.
• Step 3 - Configure an IPv4 static route for 203.0.113.0/24 with next-hop 198.51.100.100. Configure an IPv6 static route for 2001:db8:128:128::/64 with next-hop 2001:db8::64:64::1.
• Step 4 - Push configuration to DUT.
• Step 5 - Send Traffic and Verify that traffic is received from DUT.
• Step 6 - Disable static route next-hop recursive lookup by setting /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/recurse to false.
• Step 7 - Push configuration to DUT.
• Step 8 - Validate by checking that the value of /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/recurse is false.
• Step 9 - Send Traffic and Verify that traffic is NOT received from DUT, as the recursive next-hop resolution is disabled.

RT-1.26.8 - Validate Dynamic Add and Remove of Next-Hops

• Step 1 - Configure one IPv4 static route with next-hops set to the IPv4 address of ATE port-2 (index 0) and port-3 (index 1).
• Step 2 - Push configuration to DUT.
• Step 3 - Update the static route by adding next-hops for ATE port-1 (index 2) and port-4 (index 3).
• Step 4 - Push configuration to DUT.
• Step 5 - Validate all four next-hops and indexes are reported correctly using the /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/index and /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/next-hop paths.
• Step 6 - Remove two next-hops (e.g., indexes 0 and 3).
• Step 7 - Push configuration to DUT and validate that only two next-hops remain.

RT-1.26.9 - Direct Interface IP Deletion (Negative)

• Step 1 - Configure a static route that resolves via a directly connected interface IP.
• Step 2 - Delete the IP address of that direct interface using a gNMI Set DELETE.
• Step 3 - Send Traffic.
• Step 4 - Verify the traffic drops, and the static route becomes inactive without crashing the device.

RT-1.26.10 - Overlapping Prefixes / LPM (Corner)

• Step 1 - Configure overlapping static routes: 10.0.0.0/8 pointing to ATE port-1, and 10.1.1.0/24 pointing to ATE port-2.
• Step 2 - Push configuration to DUT.
• Step 3 - Send traffic to destination 10.1.1.1.
• Step 4 - Verify that traffic strictly adheres to Longest Prefix Match (LPM) routing and flows exclusively to ATE port-2.

RT-1.26.11 - Route Resolution Loop (Negative)

• Step 1 - Configure Static Route A pointing to Next-Hop IP B.
• Step 2 - Configure Static Route B pointing to Next-Hop IP A.
• Step 3 - Push configuration to DUT.
• Step 4 - Verify the device's control plane detects or breaks the recursion loop safely without hanging or crashing.

Canonical OC

{
  "openconfig-network-instance:network-instances": {
    "network-instance": [
      {
        "name": "default",
        "config": {
          "name": "default"
        },
        "protocols": {
          "protocol": [
            {
              "identifier": "openconfig-policy-types:STATIC",
              "name": "DEFAULT",
              "config": {
                "identifier": "openconfig-policy-types:STATIC",
                "name": "DEFAULT"
              },
              "static-routes": {
                "static": [
                  {
                    "prefix": "203.0.113.0/24",
                    "config": {
                      "prefix": "203.0.113.0/24",
                      "set-tag": "10"
                    },
                    "next-hops": {
                      "next-hop": [
                        {
                          "index": "0",
                          "config": {
                            "index": "0",
                            "metric": 100,
                            "preference": 50,
                            "next-hop": "192.0.2.1",
                            "recurse": true
                          }
                        }
                      ]
                    }
                  }
                ]
              }
            }
          ]
        }
      }
    ]
  }
}

OpenConfig Path and RPC Coverage

paths:
  ## Config Paths ##
  /interfaces/interface/config/enabled:
  /interfaces/interface/subinterfaces/subinterface/ipv4/config/enabled:
  /interfaces/interface/subinterfaces/subinterface/ipv6/config/enabled:
  /network-instances/network-instance/protocols/protocol/static-routes/static/config/prefix:
  /network-instances/network-instance/protocols/protocol/static-routes/static/config/set-tag:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/next-hop:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/metric:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/preference:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/config/recurse:

  ## State Paths ##
  /network-instances/network-instance/protocols/protocol/static-routes/static/state/prefix:
  /network-instances/network-instance/protocols/protocol/static-routes/static/state/set-tag:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/next-hop:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/metric:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/preference:
  /network-instances/network-instance/protocols/protocol/static-routes/static/next-hops/next-hop/state/recurse:

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

Required DUT platform

• FFF