+
+| Configure IPv4 forwarding in circular topology
+| | [Documentation]
+| | ... | Set UP state on VPP interfaces in path on nodes in 2-node / 3-node
+| | ... | circular topology. Get the interface MAC addresses and setup ARP on
+| | ... | all VPP interfaces. Setup IPv4 addresses with /24 prefix on DUT-TG
+| | ... | links. In case of 3-node topology setup IPv4 adresses with /30 prefix
+| | ... | on DUT1-DUT2 link and set routing on both DUT nodes with prefix /24
+| | ... | and next hop of neighbour DUT interface IPv4 address. Configure route
+| | ... | entries for remote hosts IPv4 addresses if required.
+| | ...
+| | ... | *Arguments:*
+| | ... | - tg_if1_ip4 - IP address of TG interface1. Type: string
+| | ... | - tg_if2_ip4 - IP address of TG interface2. Type: string
+| | ... | - dut1_if1_ip4 - IP address of DUT1 interface1. Type: string
+| | ... | - dut1_if2_ip4 - IP address of DUT1 interface1. Type: string
+| | ... | - dut2_if1_ip4 - IP address of DUT2 interface1 (Optional).
+| | ... | Type: string
+| | ... | - dut2_if2_ip4 - IP address of DUT2 interface2 (Optional).
+| | ... | Type: string
+| | ... | - remote_host1_ip4 - IP address of remote host1 (Optional).
+| | ... | Type: string
+| | ... | - remote_host2_ip4 - IP address of remote host2 (Optional).
+| | ... | Type: string
+| | ... | - remote_host_ip4_prefix - IP address prefix for host IP addresses
+| | ... | (Optional). Type: string or integer
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 20.20.20.1 \|
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 20.20.20.1 \
+| | ... | \| remote_host1_ip4=192.168.0.1 \| remote_host2_ip4=192.168.0.2 \
+| | ... | \| remote_host_ip4_prefix=32 \|
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 1.1.1.1 \| 1.1.1.2 \
+| | ... | \| 20.20.20.1 \|
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 1.1.1.1 \| 1.1.1.2 \
+| | ... | \| 20.20.20.1 \| remote_host1_ip4=192.168.0.1 \
+| | ... | \| remote_host2_ip4=192.168.0.2 \| remote_host_ip4_prefix=32 \|
+| | ...
+| | [Arguments] | ${tg_if1_ip4} | ${tg_if2_ip4} | ${dut1_if1_ip4}
+| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4}=${NONE} | ${dut2_if2_ip4}=${NONE}
+| | ... | ${remote_host1_ip4}=${NONE} | ${remote_host2_ip4}=${NONE}
+| | ... | ${remote_host_ip4_prefix}=${NONE}
+| | ...
+| | Configure interfaces in path up
+| | ...
+| | ${dut2_status} | ${value}= | Run Keyword And Ignore Error
+| | ... | Variable Should Exist | ${dut2_node}
+| | ...
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Configure IPv4 forwarding in 3-node circular topology
+| | ... | ${tg_if1_ip4} | ${tg_if2_ip4} | ${dut1_if1_ip4} | ${dut1_if2_ip4}
+| | ... | ${dut2_if1_ip4} | ${dut2_if2_ip4} | ${remote_host1_ip4}
+| | ... | ${remote_host2_ip4} | ${remote_host_ip4_prefix}
+| | ... | ELSE
+| | ... | Configure IPv4 forwarding in 2-node circular topology
+| | ... | ${tg_if1_ip4} | ${tg_if2_ip4} | ${dut1_if1_ip4} | ${dut1_if2_ip4}
+| | ... | remote_host1_ip4=${remote_host1_ip4}
+| | ... | remote_host2_ip4=${remote_host2_ip4}
+| | ... | remote_host_ip4_prefix=${remote_host_ip4_prefix}
+
+| Configure IPv4 forwarding in 2-node circular topology
+| | [Documentation]
+| | ... | Set UP state on VPP interfaces on DUT node in 2-node circular
+| | ... | topology. Get the interface MAC addresses and setup ARP on
+| | ... | all VPP interfaces. Setup IPv4 addresses with /24 prefix on DUT-TG
+| | ... | links. Configure route entries for remote hosts IPv4 addresses
+| | ... | if required.
+| | ...
+| | ... | *Arguments:*
+| | ... | - tg_if1_ip4 - IP address of TG interface1. Type: string
+| | ... | - tg_if2_ip4 - IP address of TG interface2. Type: string
+| | ... | - dut1_if1_ip4 - IP address of DUT1 interface1. Type: string
+| | ... | - dut1_if2_ip4 - IP address of DUT1 interface1. Type: string
+| | ... | - remote_host1_ip4 - IP address of remote host1 (Optional).
+| | ... | Type: string
+| | ... | - remote_host2_ip4 - IP address of remote host2 (Optional).
+| | ... | Type: string
+| | ... | - remote_host_ip4_prefix - IP address prefix for host IP addresses
+| | ... | (Optional). Type: string or integer
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 20.20.20.1 \|
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 20.20.20.1 \
+| | ... | \| 192.168.0.1 \| 192.168.0.2 \| 32 \|
+| | ...
+| | [Arguments] | ${tg_if1_ip4} | ${tg_if2_ip4} | ${dut1_if1_ip4}
+| | ... | ${dut1_if2_ip4} | ${remote_host1_ip4}=${NONE}
+| | ... | ${remote_host2_ip4}=${NONE} | ${remote_host_ip4_prefix}=${NONE}
+| | ...
+| | ${dut_tg_ip4_prefix}= | Set Variable | 24
+| | ...
+| | Add arp on dut | ${dut_node} | ${dut_to_tg_if1} | ${tg_if1_ip4}
+| | ... | ${tg_to_dut_if1_mac}
+| | Add arp on dut | ${dut_node} | ${dut_to_tg_if2} | ${tg_if2_ip4}
+| | ... | ${tg_to_dut_if2_mac}
+| | ...
+| | Configure IP addresses on interfaces | ${dut_node} | ${dut_to_tg_if1}
+| | ... | ${dut1_if1_ip4} | ${dut_tg_ip4_prefix}
+| | Configure IP addresses on interfaces | ${dut_node} | ${dut_to_tg_if2}
+| | ... | ${dut1_if2_ip4} | ${dut_tg_ip4_prefix}
+| | ...
+| | Run Keyword Unless | '${remote_host1_ip4}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut_node} | ${remote_host1_ip4}
+| | ... | ${remote_host_ip4_prefix} | gateway=${tg_if1_ip4}
+| | ... | interface=${dut_to_tg_if1}
+| | Run Keyword Unless | '${remote_host2_ip4}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut_node} | ${remote_host2_ip4}
+| | ... | ${remote_host_ip4_prefix} | gateway=${tg_if2_ip4}
+| | ... | interface=${dut_to_tg_if2}
+
+| Configure IPv4 forwarding in 3-node circular topology
+| | [Documentation]
+| | ... | Set UP state on VPP interfaces in path on nodes in 3-node circular
+| | ... | topology. Get the interface MAC addresses and setup ARP on all VPP
+| | ... | interfaces. Setup IPv4 addresses with /24 prefix on DUT-TG links.
+| | ... | Configure IPv4 adresses with /30 prefix on DUT1-DUT2 link and set
+| | ... | routing on both DUT nodes with prefix /24 and next hop of neighbour
+| | ... | DUT interface IPv4 address. Configure route entries for remote hosts
+| | ... | IPv4 addresses if required.
+| | ...
+| | ... | *Arguments:*
+| | ... | - tg_if1_ip4 - IP address of TG interface1. Type: string
+| | ... | - tg_if2_ip4 - IP address of TG interface2. Type: string
+| | ... | - dut1_if1_ip4 - IP address of DUT1 interface1. Type: string
+| | ... | - dut1_if2_ip4 - IP address of DUT1 interface1. Type: string
+| | ... | - dut2_if1_ip4 - IP address of DUT2 interface1. Type: string
+| | ... | - dut2_if2_ip4 - IP address of DUT2 interface2. Type: string
+| | ... | - remote_host1_ip4 - IP address of remote host1 (Optional).
+| | ... | Type: string
+| | ... | - remote_host2_ip4 - IP address of remote host2 (Optional).
+| | ... | Type: string
+| | ... | - remote_host_ip4_prefix - IP address prefix for host IP addresses
+| | ... | (Optional). Type: string or integer
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 1.1.1.1 \| 1.1.1.2 \
+| | ... | \| 20.20.20.1 \|
+| | ... | \| Configure IPv4 forwarding in circular topology \
+| | ... | \| 10.10.10.2 \| 20.20.20.2 \| 10.10.10.1 \| 1.1.1.1 \| 1.1.1.2 \
+| | ... | \| 20.20.20.1 \| 192.168.0.1 \| 192.168.0.2 \| 32 \|
+| | ...
+| | [Arguments] | ${tg_if1_ip4} | ${tg_if2_ip4} | ${dut1_if1_ip4}
+| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${dut2_if2_ip4}
+| | ... | ${remote_host1_ip4}=${NONE} | ${remote_host2_ip4}=${NONE}
+| | ... | ${remote_host_ip4_prefix}=${NONE}
+| | ...
+| | ${dut_tg_ip4_prefix}= | Set Variable | 24
+| | ${dut_link_ip4_prefix}= | Set Variable | 30
+| | ...
+| | Add arp on dut | ${dut1_node} | ${dut1_to_tg} | ${tg_if1_ip4}
+| | ... | ${tg_to_dut1_mac}
+| | Add arp on dut | ${dut1_node} | ${dut1_to_dut2} | ${dut2_if1_ip4}
+| | ... | ${dut2_to_dut1_mac}
+| | Add arp on dut | ${dut2_node} | ${dut2_to_dut1} | ${dut1_if2_ip4}
+| | ... | ${dut1_to_dut2_mac}
+| | Add arp on dut | ${dut2_node} | ${dut2_to_tg} | ${tg_if2_ip4}
+| | ... | ${tg_to_dut2_mac}
+| | ...
+| | Configure IP addresses on interfaces | ${dut1_node} | ${dut1_to_tg}
+| | ... | ${dut1_if1_ip4} | ${dut_tg_ip4_prefix}
+| | Configure IP addresses on interfaces | ${dut1_node} | ${dut1_to_dut2}
+| | ... | ${dut1_if2_ip4} | ${dut_link_ip4_prefix}
+| | Configure IP addresses on interfaces | ${dut2_node} | ${dut2_to_dut1}
+| | ... | ${dut2_if1_ip4} | ${dut_link_ip4_prefix}
+| | Configure IP addresses on interfaces | ${dut2_node} | ${dut2_to_tg}
+| | ... | ${dut2_if2_ip4} | ${dut_tg_ip4_prefix}
+| | ...
+| | Vpp Route Add | ${dut1_node} | ${tg_if2_ip4} | ${dut_tg_ip4_prefix}
+| | ... | gateway=${dut2_if1_ip4} | interface=${dut1_to_dut2}
+| | Vpp Route Add | ${dut2_node} | ${tg_if1_ip4} | ${dut_tg_ip4_prefix}
+| | ... | gateway=${dut1_if2_ip4} | interface=${dut2_to_dut1}
+| | ...
+| | Run Keyword Unless | '${remote_host1_ip4}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut1_node} | ${remote_host1_ip4}
+| | ... | ${remote_host_ip4_prefix} | gateway=${tg_if1_ip4}
+| | ... | interface=${dut1_to_tg}
+| | Run Keyword Unless | '${remote_host2_ip4}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut1_node} | ${remote_host2_ip4}
+| | ... | ${remote_host_ip4_prefix} | gateway=${dut2_if1_ip4}
+| | ... | interface=${dut1_to_dut2}
+| | Run Keyword Unless | '${remote_host1_ip4}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut2_node} | ${remote_host1_ip4}
+| | ... | ${remote_host_ip4_prefix} | gateway=${dut1_if2_ip4}
+| | ... | interface=${dut2_to_dut1}
+| | Run Keyword Unless | '${remote_host2_ip4}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut2_node} | ${remote_host2_ip4}
+| | ... | ${remote_host_ip4_prefix} | gateway=${tg_if2_ip4}
+| | ... | interface=${dut2_to_tg}