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‎feature/interface/helper_address/otg_tests/relay_agent_test/README.md‎

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# RELAY-1.1: DHCP Relay functionality
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## Summary
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This is to validate the DHCP relay functionality on a DUT. The test validates the following actions -
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* DUT receives the IPv4/IPv6 DHCP discovery message over an individual or a LAG port and it will forward the request to the DHCP helper address.
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* DUT forwards DHCP exchange messages between the DHCP Client and DHCP server.
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* The DHCP client receives a DHCP address.
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## Testbed Type
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* [`featureprofiles/topologies/atedut_4.testbed`](https://github.com/openconfig/featureprofiles/blob/main/topologies/atedut_4.testbed)
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## Procedure
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### Test environment setup
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```mermaid
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graph LR;
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A[ATE:Port1] --(Vlan 10)-->B[Port1:DUT:Port3];B --Egress-->C[Port3:ATE];
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```
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```
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---------
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| |
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[ ATE:Port1, ATE:Port2 ] ==== LAG (VLAN 10)=== | DUT |----Egress---[ ATE:Port3 ]
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| |
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---------
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```
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* Connect ports DUT:Ports[1-3] to ports ATE:Ports[1-3]
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* Simulate a scenario of having a DHCP server is behind ATE:Port[3]
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* DUT:Port[3] IPv4 address = 192.0.2.0/31
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* DUT:Port[3] IPv6 address = 2001:db8:a::0/127
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### Configuration
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* Configure VLAN 10 on DUT.
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* Have DUT:Port[1] and DUT:Port[2] be a part of vlan 10
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* VLAN10 interface IPv4 address: 192.0.2.33/27
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* VLAN10 interface IPv6 address: 2001:db8:a:1::1/64
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* Configure IPv4 and IPv6 helper address under VLAN10 interface.
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* IPv4 helper address - 192.0.2.254
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* IPv6 dhcp relay destination address : 2001:db8:a:2::1
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* Configure IPv4 default route on the DUT pointing to ATE:Port[3] IPv4 address.
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* Configure IPv6 default route on the DUT pointing to ATE:Port[3] IPv6 address.
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### RELAY-1.1.1 DHCP request on an individual port
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* Step 1 - Have ATE:Port[1] as an individual port and act as a DHCP client.
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* Step 2 - Send IPv4 and IPv6 DHCP request (Discover message) from ATE:Port[1].
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**Verify that:**
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* The DUT:Port[1] receives the DHCP request and forwards it to the helper IPv4 and IPv6 addresses respectively.
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* The ATE:Port[1] can successfully obtain an IPv4 address that is a part of the subnet 192.0.2.32/27 with the default gateway set to 192.0.2.33.
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* The ATE:Port[1] can successfully obtain an IPv6 address that is a part of the subnet 2001:db8:a:1::/64 with the default gateway set to 2001:db8:a:1::1.
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### RELAY-1.1.2 DHCP request on a lag port
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* Step 1 - DUT:Port[1] and DUT:Port[2] are configured as a LACP LAG (LAG1) port to ATE:Port[1] and ATE:Port[2] respectively.
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* Step 2 - Send IPv4 and IPv6 DHCP request (Discover message) from ATE:Port[1].
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**Verify that:**
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* The DUT:Port[1] receives the DHCP request and forwards it to the helper IPv4 and IPv6 addresses respectively.
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* The ATE:Port[1] can successfully obtain an IPv4 address that is a part of the subnet 192.0.2.32/27 with the default gateway set to 192.0.2.33.
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* The ATE:Port[1] can successfully obtain an IPv6 address that is a part of the subnet 2001:db8:a:1::/64 with the default gateway set to 2001:db8:a:1::1.
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#### Canonical OC
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```json
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{
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"openconfig-relay-agent:relay-agent": {
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"dhcp": {
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"interfaces": {
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"interface": [
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{
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"id": "Vlan10",
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"config": {
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"id": "Vlan10",
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"helper-address": [
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"192.0.2.254",
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"2001:db8:a:2::1"
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]
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},
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"state": {
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"id": "Vlan10"
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}
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}
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]
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}
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}
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}
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}
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```
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## OpenConfig Path and RPC Coverage
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```yaml
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paths:
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## Config Paths ##
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/relay-agent/dhcp/interfaces/interface[id=Vlan10]/config/id:
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/relay-agent/dhcp/interfaces/interface[id=Vlan10]/ipv4/config/helper-address:
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/relay-agent/dhcp/interfaces/interface[id=Vlan10]/ipv6/config/helper-address:
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## State Paths ##
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/relay-agent/dhcp/interfaces/interface/ipv4/state/helper-address:
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/relay-agent/dhcp/interfaces/interface/ipv6/state/helper-address:
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rpcs:
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gnmi:
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gNMI.Set:
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union_replace: true
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replace: true
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gNMI.Subscribe:
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on_change: true
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```
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## Required DUT platform
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* Specify the minimum DUT-type:
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* FFF - Fixed Form Factor

‎feature/interface/helper_address/otg_tests/relay_agent_test/metadata.textproto‎

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# proto-file: github.com/openconfig/featureprofiles/proto/metadata.proto
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# proto-message: Metadata
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uuid: "4f1bebd9-c0af-4d28-a041-f95b3816f354"
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plan_id: "RELAY-1.1"
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description: "DHCP Relay functionality"
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testbed: TESTBED_DUT_ATE_4LINKS
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platform_exceptions: {
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platform: {
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vendor: ARISTA
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}
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deviations: {
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interface_enabled: true
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default_network_instance: "default"
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}
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}

‎testregistry.textproto‎

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readme: "https://github.com/openconfig/featureprofiles/blob/main/feature/platform/tests/interface_parent_component/README.md"
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exec: " "
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}
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test: {
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id: "RELAY-1.1"
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description: "DHCP Relay functionality"
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readme: "https://github.com/openconfig/featureprofiles/blob/main/feature/interface/helper_address/otg_tests/relay_agent_test/README.md"
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exec: " "
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}
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test: {
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id: "RT-1.2"
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description: "BGP Policy & Route Installation"

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