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Split TE backup NHG action into DCGate and POPGate tests (openconfig#…
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feature/experimental/gribi/otg_tests/backup_nhg_action_pbf/README.md
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| # TE-11.31: Backup NHG: Actions with PBF | ||
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| ## Summary | ||
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| Validate gRIBI Backup NHG actions with PBF. | ||
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| ## Topology | ||
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| * Connect ATE port-1 to DUT port-1, ATE port-2 to DUT port-2, ATE port-3 to | ||
| DUT port-3, and ATE port-4 to DUT port-4. | ||
| * Create a 3 non-default VRF: | ||
| * `VRF-A` that includes DUT port-1. | ||
| * `VRF-B` that includes no interface. | ||
| * `VRF-C` that includes no interface. | ||
| * `OuterDstIP_1`, `OuterSrcIP_1`, `OuterDstIP_2`, `OuterSrcIP_2`: IPinIP outer | ||
| IP addresses. | ||
| * `InnerDstIP_1`, `InnerSrcIP_1`: IPinIP inner IP addresses. | ||
| * `VIP_1`, `VIP_2`: IP addresses used for recursive resolution. | ||
| * `ATEPort2IP`: testbed assigned interface IP to ATE port 2 | ||
| * `ATEPort3IP`: testbed assigned interface IP to ATE port 3 | ||
| * All the NHG and NH objects injected by gRIBI are in the DEFAULT VRF. | ||
| * Add an empty decap VRF, `DECAP_TE_VRF`. | ||
| * Add 4 empty encap VRFs, `ENCAP_TE_VRF_A`, `ENCAP_TE_VRF_B`, `ENCAP_TE_VRF_C` | ||
| and `ENCAP_TE_VRF_D`. | ||
| * Replace the existing VRF selection policy with `vrf_selection_policy_w` as | ||
| in <https://github.com/openconfig/featureprofiles/pull/2217> | ||
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| ## Setups | ||
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| Different test scenarios requires different setups. | ||
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| * Setup#1 | ||
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| * Make sure DUT port-2, port-3 and port-4 are up. | ||
| * Make sure there is a static route in the default VRF for `InnerDstIP_1`, | ||
| pointing to ATE port-4. | ||
| * Connect a gRIBI client to DUT with session parameters | ||
| `{persistence=PRESERVE Redundancy=SINGLE_PRIMARY}` | ||
| * gRIBI Flush the DUT. | ||
| * Inject the following gRIBI structure to the DTU: | ||
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| ```text | ||
| VIP_1/32 {DEFAULT VRF} --> NHG#1 --> NH#1 {next-hop: ATEPort2IP} | ||
| NHG#100 --> NH#100 {decap, network-instance:DEFAULT} | ||
| NHG#101 --> [NH#101 {next-hop: VIP1}, backupNHG: NHG#100] | ||
| OuterDstIP_1/32 {VRF-A} --> NHG#101 | ||
| ``` | ||
| * Setup#2 | ||
| * Make sure DUT port-2, port-3 and port-4 are up. | ||
| * Make sure there is a static route in the default VRF for `InnerDstIP_1`, | ||
| pointing to ATE port-4. | ||
| * Connect a gRIBI client to DUT with session parameters | ||
| `{persistence=PRESERVE Redundancy=SINGLE_PRIMARY}` | ||
| * gRIBI Flush the DUT. | ||
| * Inject the following gRIBI structure to the DTU: | ||
| ```text | ||
| VIP_1/32 {DEFAULT VRF} --> NHG#1 --> NH#1 {next-hop: ATEPort2IP} | ||
| VIP_2/32 {DEFAULT VRF} --> NHG#2 --> NH#2 {next-hop: ATEPort3IP} | ||
| NHG#100 --> NH#100 {network-instance:VRF-B} | ||
| NHG#101 --> [NH#101 {next-hop: VIP1}, backupNHG: NHG#100] | ||
| OuterDstIP_1/32 {VRF-A} --> NHG#101 | ||
| NHG#103 --> NH#103 {decap, network-instance:DEFAULT} | ||
| NHG#102 --> [NH#102 {decap-encap, src:`OuterSrcIP_2`, dst:`OuterDstIP_2`, network-instance: VRF-C}, backupNHG: NHG#103] | ||
| OuterDstIP_1/32 {VRF-B} --> NHG#102 | ||
| NHG#104 --> [NH#104 {next-hop: VIP-2}, backupNHG: NHG#103] | ||
| OuterDstIP_2/32 {VRF-C} --> NHG#104 | ||
| ``` | ||
| ## Procedure | ||
| * TEST#1 - (next-hop viability triggers decap in backup NHG): | ||
| 1. Deploy Setup#1 as above. | ||
| 2. Send IPinIP traffic to `OuterDstIP_1` with inner IP as `InnerDstIP_1`, | ||
| and validate that ATE port-2 receives the IPinIP traffic. | ||
| * Shutdown DUT port-2 interface, and validate that ATE port-4 receives the | ||
| decapsulated traffic with `InnerDstIP_1`. | ||
| * Test#2 - (tunnel viability triggers decap and encap in the backup NHG): | ||
| * Deploy Setup#2 as above. | ||
| * Send IPinIP traffic to `OuterDstIP_1`. Validate that ATE port-2 receives | ||
| the IPinIP traffic with outer IP as `OuterDstIP_1`. | ||
| * Shutdown DUT port-2 interface, and validate that ATE port-3 receives the | ||
| IPinIP traffic with outer destination IP as `OuterDstIP_2`, and outer | ||
| source IP as `OuterSrcIP_2` | ||
| * Shutdown DUT port-3 interface, and validate that ATE port-4 receives the | ||
| traffic with decapsulated traffic with destination IP as `InnerDstIP_1` | ||
| at ATE port-4. | ||
| ## Config Parameter coverage | ||
| No new configuration covered. | ||
| ## Telemetry Parameter coverage | ||
| No new telemetry covered. | ||
| ## Protocol/RPC Parameter coverage | ||
| ## Minimum DUT platform requirement | ||
| vRX if the vendor implementation supports FIB-ACK simulation, otherwise FFF. | ||
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