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Update Traceroute packetin test (#3113)
* Update Traceroute packetin test * Address review comments * Update based on review comments * Add a few more test cases * Clarify based on review comments * Add TODOs * Update based on review comments * Move README to seperate test * Revert original file * Revert old README * typo * typo * typo * Remove TODOs --------- Co-authored-by: Nathaniel Flath <[email protected]> Co-authored-by: Xiao Wang <[email protected]>
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...perimental/p4rt/otg_tests/traceroute_packetin_with_vrf_selection_test/README.md
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| # P4RT-5.3: Traceroute: PacketIn With VRF Selection | ||
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| ## Summary | ||
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| Test FRR behaviors with VRF selection scenarios. | ||
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| ## Topology | ||
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| ATE port-1 <------> port-1 DUT | ||
| DUT port-2 <------> port-2 ATE | ||
| DUT port-3 <------> port-3 ATE | ||
| DUT port-4 <------> port-4 ATE | ||
| DUT port-5 <------> port-5 ATE | ||
| DUT port-6 <------> port-6 ATE | ||
| DUT port-7 <------> port-7 ATE | ||
| DUT port-8 <------> port-8 ATE | ||
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| ## Baseline setup | ||
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| * Setup equivalent to [TE-17.1 vrf_policy_driven_te](https://github.com/openconfig/featureprofiles/blob/main/feature/experimental/gribi/otg_tests/vrf_policy_driven_te/README.md), including GRibi programming. | ||
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| * Install a BGP route resolved by ISIS in default VRF to route traffic out of DUT port-8 for 203.0.113.0. | ||
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| * Enable the P4RT server on the device. | ||
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| * Connect a P4RT client and configure the forwarding pipeline. Install P4RT table entries required for traceroute. | ||
| These are located in [p4rt_utils.go] (https://github.com/openconfig/featureprofiles/blob/main/internal/p4rtutils/p4rtutils.go) | ||
| p4rtutils.ACLWbbIngressTableEntryGet(packetIO.GetTableEntry(delete, isIPv4)) | ||
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| ## Procedure | ||
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| At the start of each of the following scenarios, ensure: | ||
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| * All ports are up and baseline is reset as above. | ||
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| Unless otherwise specified, all the tests below should use traffic with | ||
| `dscp_encap_a_1` referenced int he VRF selection policy. | ||
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| ### Test-1 | ||
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| Tests that traceroute with TTL=1 for a packet that would match the VRF | ||
| selection policy for encap has target_egress_port set based on the | ||
| encap VRF. | ||
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| * Send packets to DUT port-1 with outer packet header TTL=1. The outer v4 header has the destination | ||
| addresses 138.0.11.8. verify that packets with TTL=1 are received by the client. | ||
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| * Verify that the punted packets have both ingress_port and target_egress_port metadata set. | ||
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| The distribution of packets should have target_egress_port set with port2 1.56% of | ||
| the time, port3 4.68%, port4 18.75% and port6 75%. | ||
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| ### Test-2 | ||
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| Tests that traceroute with TTL=1 for a packet that would match the VRF | ||
| selection policy for default has target_egress_port set based on the | ||
| default VRF. | ||
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| * Send packets to DUT port-1 with packet TTL=1. The v4 header has the destination | ||
| address 203.0.113.0. Verify that packets with TTL=1 are received by the client. | ||
| * Verify that the packets have both ingress_port and target_egress_port metadata set. | ||
| target_egress_port should be dut port 8. | ||
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| ### Test-3 | ||
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| Tests that a packet punted due to TTL=1 for a packet that would | ||
| otherwise hit a transit VRF has target_egress_port set based on that | ||
| transit VRF. | ||
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| * Send 4in4 (IP protocol 4) and 6in4 (IP protocol 41) packets to DUT port-1 where | ||
| * The outer v4 header has the destination address 203.0.113.1. | ||
| * The outer v4 header has the source address ipv4_outer_src_111. | ||
| * The outer v4 header has DSCP value has `dscp_encap_no_match` and `dscp_encap_match` | ||
| * The outer v4 header has TTL=1 | ||
| * Verify that the punted packets have both ingress_port and | ||
| target_egress_port metadata set. target_egress_port should be set | ||
| to on DUT port-2, port-3, and port-4 per the heirarchical weight. | ||
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| ### Test-4 (TBD) | ||
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| Tests that traceroute respects transit FRR. | ||
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| ### Test-5 (TBD) | ||
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| Tests that traceroute respects transit FRR when the backup is also unviable. | ||
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| ### Test-6 | ||
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| Tests that traceroute respects decap rules. | ||
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| 1. Using gRIBI to install the following entries in the `DECAP_TE_VRF`: | ||
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| ``` | ||
| IPv4Entry {192.51.100.1/24 (DECAP_TE_VRF)} -> NHG#1001 (DEFAULT VRF) -> { | ||
| {NH#1001, DEFAULT VRF, weight:1} | ||
| } | ||
| NH#1001 -> { | ||
| decapsulate_header: OPENCONFIGAFTTYPESDECAPSULATIONHEADERTYPE_IPV4 | ||
| } | ||
| ``` | ||
| 2. Apply vrf selection policy `vrf_selection_policy_w` to DUT port-1. | ||
| 3. Send the following 6in4 and 4in4 flows to DUT port-1: | ||
| ``` | ||
| * inner_src: `ipv4_inner_src` | ||
| * inner_dst: `ipv4_inner_encap_match` | ||
| * dscp: `dscp_encap_no_match` | ||
| * outer_src: `ipv4_outer_src_111` | ||
| * outer_dst: `ipv4_outer_decap_match` | ||
| * dscp: `dscp_encap_no_match` | ||
| * proto: `4` | ||
| * outer TTL: `1` | ||
| * inner_src: `ipv6_inner_src` | ||
| * inner_dst: `ipv6_inner_encap_match` | ||
| * dscp: `dscp_encap_no_match` | ||
| * outer_src: `ipv4_outer_src_111` | ||
| * outer_dst: `ipv4_outer_decap_match` | ||
| * dscp: `dscp_encap_no_match` | ||
| * proto: `41` | ||
| * outer TTL: `1` | ||
| ``` | ||
| 4. Verify that all punted packets: | ||
| * Have ingress_port and target_egress_port metadata set | ||
| * target_egress_port is set to DUT port-8 per the hierarchical weight. | ||
| 6. Change the subnet mask from /24 and repeat the test for the masks /32, /22, and /28 and verify again that the packets are punted correctly. | ||
| ### Test-7 (TBD) | ||
| Encap failure cases (TBD on confirmation) | ||
| ### Test-8 (TBD) | ||
| Tests that traceroute for a packet with a route lookup miss has an unset target_egress_port. | ||
| ### Test-9, decap the encap | ||
| 1. Using gRIBI to install the following entries in the `DECAP_TE_VRF`: | ||
| ``` | ||
| IPv4Entry {192.51.100.1/24 (DECAP_TE_VRF)} -> NHG#1001 (DEFAULT VRF) -> { | ||
| {NH#1001, DEFAULT VRF, weight:1} | ||
| } | ||
| NH#1001 -> { | ||
| decapsulate_header: OPENCONFIGAFTTYPESDECAPSULATIONHEADERTYPE_IPV4 | ||
| } | ||
| ``` | ||
| 2. Apply vrf selection policy `vrf_selection_policy_w` to DUT port-1. | ||
| 3. Send the following packets to DUT port-1: | ||
| ``` | ||
| * inner_src: `ipv4_inner_src` | ||
| * inner_dst: `ipv4_inner_encap_match` | ||
| * dscp: `dscp_encap_a_1` | ||
| * outer_src: `ipv4_outer_src_222` | ||
| * outer_dst: `ipv4_outer_decap_match` | ||
| * dscp: `dscp_encap_a_1` | ||
| * proto: `4` | ||
| * outer TTL: '1' | ||
| ``` | ||
| ``` | ||
| * inner_src: `ipv6_inner_src` | ||
| * inner_dst: `ipv6_inner_encap_match` | ||
| * dscp: `dscp_encap_a_1` | ||
| * outer_src: `ipv4_outer_src_111` | ||
| * outer_dst: `ipv4_outer_decap_match` | ||
| * dscp: `dscp_encap_a_1` | ||
| * proto: `41` | ||
| * outer TTL: `1` | ||
| ``` | ||
| 4. We should expect that all punted packets: | ||
| * Have ingress_port and target_egress_port metadata set | ||
| * target_egress_port is set to DUT port-2, port-3, port-4 and port-6 per the hierarchical weight. | ||
| 5. Send the following packets to DUT port -1 | ||
| ``` | ||
| * inner_src: `ipv4_inner_src` | ||
| * inner_dst: `ipv4_inner_encap_match` | ||
| * dscp: `dscp_encap_b_1` | ||
| * outer_src: `ipv4_outer_src_111` | ||
| * outer_dst: `ipv4_outer_decap_match` | ||
| * dscp: `dscp_encap_b_1` | ||
| * proto: `4` | ||
| * inner_src: `ipv6_inner_src` | ||
| * inner_dst: `ipv6_inner_encap_match` | ||
| * dscp: `dscp_encap_b_1` | ||
| * outer_src: `ipv4_outer_src_222` | ||
| * outer_dst: `ipv4_outer_decap_match` | ||
| * dscp: `dscp_encap_b_1` | ||
| * proto: `41` | ||
| ``` | ||
| 6. Verify that all punted packets: | ||
| * Have ingress_port and target_egress_port metadata set | ||
| * target_egress_port is set to DUT port-2, port-3, port-4 and port-6 per the hierarchical weight. | ||
| ## Config Parameter Coverage | ||
| * network-instances/network-instance/name | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/policy-id | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/sequence-id | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/protocol | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/dscp-set | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/source-address | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/protocol | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/dscp-set | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/source-address | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/decap-network-instance | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/post-network-instance | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/decap-fallback-network-instance | ||
| ## Telemetry Parameter Coverage | ||
| * network-instances/network-instance/name | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/policy-id | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/sequence-id | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/protocol | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/dscp-set | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv4/source-address | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/protocol | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/dscp-set | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/ipv6/source-address | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/decap-network-instance | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/post-network-instance | ||
| * network-instances/network-instance/policy-forwarding/policies/policy/rules/rule/action/decap-fallback-network-instance | ||
| ## Protocol/RPC Parameter Coverage | ||
| * gRIBI: | ||
| * Modify | ||
| * ModifyRequest |