-| Send IPv6 icmp echo request to DUT1 ingress inteface and verify answer
-| | [Documentation] | Type of the src_node must be TG and dst_node must be DUT
-| | [Arguments] | ${tg_node} | ${dut_node} | ${nodes_addr}
-| | Append Nodes | ${tg_node} | ${dut_node}
-| | Compute Path
-| | ${src_port} | ${src_node}= | First Interface
-| | ${dst_port} | ${dst_node}= | Last Interface
-| | ${src_ip}= | Get Node Port Ipv6 Address | ${src_node} | ${src_port} | ${nodes_addr}
-| | ${dst_ip}= | Get Node Port Ipv6 Address | ${dst_node} | ${dst_port} | ${nodes_addr}
-| | ${src_mac}= | Get Interface Mac | ${src_node} | ${src_port}
-| | ${dst_mac}= | Get Interface Mac | ${dst_node} | ${dst_port}
-| | ${src_port_name}= | Get interface name | ${src_node} | ${src_port}
-| | ${args}= | Traffic Script Gen Arg | ${src_port_name} | ${src_port_name} | ${src_mac}
-| | | ... | ${dst_mac} | ${src_ip} | ${dst_ip}
-| | Run Traffic Script On Node | icmpv6_echo.py | ${tg_node} | ${args}
-| | Get interface statistics | ${dst_node}
-| | ${ipv6_counter}= | Get interface ipv6 counter | ${dst_node} | ${dst_port}
-| | Should Be Equal | ${ipv6_counter} | ${2} | #ICMPv6 neighbor advertisement + ICMPv6 echo request
-
-| Execute IPv6 ICMP echo sweep
-| | [Documentation] | Type of the src_node must be TG and dst_node must be DUT
-| | [Arguments] | ${src_node} | ${dst_node} | ${start_size} | ${end_size}
-| | ... | ${step} | ${nodes_addr}
-| | Append Nodes | ${src_node} | ${dst_node}
-| | Compute Path
-| | ${src_port} | ${src_node}= | First Interface
-| | ${dst_port} | ${dst_node}= | Last Interface
-| | ${src_ip}= | Get Node Port Ipv6 Address | ${src_node} | ${src_port}
-| | ... | ${nodes_addr}
-| | ${dst_ip}= | Get Node Port Ipv6 Address | ${dst_node} | ${dst_port}
-| | ... | ${nodes_addr}
-| | ${src_mac}= | Get Interface Mac | ${src_node} | ${src_port}
-| | ${dst_mac}= | Get Interface Mac | ${dst_node} | ${dst_port}
-| | ${src_port_name}= | Get interface name | ${src_node} | ${src_port}
-| | ${args}= | Traffic Script Gen Arg | ${src_port_name} | ${src_port_name}
-| | | ... | ${src_mac} | ${dst_mac} | ${src_ip} | ${dst_ip}
-| | ${args}= | Set Variable
-| | ... | ${args} --start_size ${start_size} --end_size ${end_size} --step ${step}
-| | Run Traffic Script On Node | ipv6_sweep_ping.py | ${src_node} | ${args}
-| | ... | timeout=${180}
-
-| Send IPv6 ICMP echo request to DUT1 egress interface and verify answer
-| | [Documentation] | Send traffic from TG to first DUT egress interface
-| | [Arguments] | ${tg_node} | ${first_dut} | ${second_dut} | ${nodes_addr}
-| | Append Nodes | ${tg_node} | ${first_dut} | ${second_dut}
-| | Compute Path
-| | ${src_port} | ${src_node}= | First Interface
-| | ${dst_port} | ${dst_node}= | Last Egress Interface
-| | ${hop_port} | ${hop_node}= | First Ingress Interface
-| | ${src_ip}= | Get Node Port Ipv6 Address | ${src_node} | ${src_port} | ${nodes_addr}
-| | ${dst_ip}= | Get Node Port Ipv6 Address | ${dst_node} | ${dst_port} | ${nodes_addr}
-| | ${src_mac}= | Get Interface Mac | ${src_node} | ${src_port}
-| | ${dst_mac}= | Get Interface Mac | ${hop_node} | ${hop_port}
-| | ${src_port_name}= | Get interface name | ${src_node} | ${src_port}
-| | ${args}= | Traffic Script Gen Arg | ${src_port_name} | ${src_port_name} | ${src_mac}
-| | | ... | ${dst_mac} | ${src_ip} | ${dst_ip}
-| | Run Traffic Script On Node | icmpv6_echo.py | ${tg_node} | ${args}
-
-
-| Send IPv6 ICMP echo request to DUT2 via DUT1 and verify answer
-| | [Documentation] | Send traffic from TG to second DUT through first DUT
-| | [Arguments] | ${tg_node} | ${first_dut} | ${second_dut} | ${nodes_addr}
-| | Append Nodes | ${tg_node} | ${first_dut} | ${second_dut}
-| | Compute Path
-| | ${src_port} | ${src_node}= | First Interface
-| | ${dst_port} | ${dst_node}= | Last Interface
-| | ${hop_port} | ${hop_node}= | First Ingress Interface
-| | ${src_ip}= | Get Node Port Ipv6 Address | ${src_node} | ${src_port} | ${nodes_addr}
-| | ${dst_ip}= | Get Node Port Ipv6 Address | ${dst_node} | ${dst_port} | ${nodes_addr}
-| | ${src_mac}= | Get Interface Mac | ${src_node} | ${src_port}
-| | ${dst_mac}= | Get Interface Mac | ${hop_node} | ${hop_port}
-| | ${src_port_name}= | Get interface name | ${src_node} | ${src_port}
-| | ${args}= | Traffic Script Gen Arg | ${src_port_name} | ${src_port_name} | ${src_mac}
-| | | ... | ${dst_mac} | ${src_ip} | ${dst_ip}
-| | Run Traffic Script On Node | icmpv6_echo.py | ${tg_node} | ${args}
-
-| Send IPv6 ICMP echo request to DUT2 egress interface via DUT1 and verify answer
-| | [Documentation] | Send traffic from TG to second DUT egress interface through first DUT
-| | [Arguments] | ${tg_node} | ${first_dut} | ${second_dut} | ${nodes_addr}
-| | Append Nodes | ${tg_node} | ${first_dut} | ${second_dut} | ${tg_node}
-| | Compute Path
-| | ${src_port} | ${src_node}= | First Interface
-| | ${dst_port} | ${dst_node}= | Last Egress Interface
-| | ${hop_port} | ${hop_node}= | First Ingress Interface
-| | ${src_ip}= | Get Node Port Ipv6 Address | ${src_node} | ${src_port} | ${nodes_addr}
-| | ${dst_ip}= | Get Node Port Ipv6 Address | ${dst_node} | ${dst_port} | ${nodes_addr}
-| | ${src_mac}= | Get Interface Mac | ${src_node} | ${src_port}
-| | ${dst_mac}= | Get Interface Mac | ${hop_node} | ${hop_port}
-| | ${src_port_name}= | Get interface name | ${src_node} | ${src_port}
-| | ${args}= | Traffic Script Gen Arg | ${src_port_name} | ${src_port_name} | ${src_mac}
-| | | ... | ${dst_mac} | ${src_ip} | ${dst_ip}
-| | Run Traffic Script On Node | icmpv6_echo.py | ${tg_node} | ${args}
-
-| Ipv6 tg to tg routed
-| | [Documentation] | Send traffic from one TG port to another through DUT nodes
-| | ... | and send reply back, also verify hop limit processing
-| | [Arguments] | ${tg_node} | ${first_dut} | ${second_dut} | ${nodes_addr}
-| | Append Nodes | ${tg_node} | ${first_dut} | ${second_dut} | ${tg_node}
-| | Compute Path
-| | ${src_port} | ${src_node}= | First Interface
-| | ${dst_port} | ${dst_node}= | Last Interface
-| | ${src_nh_port} | ${src_nh_node}= | First Ingress Interface
-| | ${dst_nh_port} | ${dst_nh_node}= | Last Egress Interface
-| | ${src_ip}= | Get Node Port Ipv6 Address | ${src_node} | ${src_port} | ${nodes_addr}
-| | ${dst_ip}= | Get Node Port Ipv6 Address | ${dst_node} | ${dst_port} | ${nodes_addr}
-| | ${src_mac}= | Get Interface Mac | ${src_node} | ${src_port}
-| | ${dst_mac}= | Get Interface Mac | ${src_node} | ${dst_port}
-| | ${src_nh_mac}= | Get Interface Mac | ${src_nh_node} | ${src_nh_port}
-| | ${dst_nh_mac}= | Get Interface Mac | ${dst_nh_node} | ${dst_nh_port}
-| | ${src_port_name}= | Get interface name | ${src_node} | ${src_port}
-| | ${dst_port_name}= | Get interface name | ${dst_node} | ${dst_port}
-| | ${args}= | Traffic Script Gen Arg | ${src_port_name} | ${dst_port_name} | ${src_mac}
-| | | ... | ${dst_mac} | ${src_ip} | ${dst_ip}
-| | ${args}= | Catenate | ${args} | --src_nh_mac ${src_nh_mac}
-| | | ... | --dst_nh_mac ${dst_nh_mac} | --h_num 2
-| | Run Traffic Script On Node | icmpv6_echo_req_resp.py | ${tg_node} | ${args}
+| Initialize IPv6 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 neighbor
+| | ... | on all VPP interfaces. Setup IPv6 addresses with /64 prefix on DUT-TG
+| | ... | links. In case of 3-node topology setup IPv6 adresses with /64 prefix
+| | ... | on DUT1-DUT2 link and set routing on both DUT nodes with prefix /64
+| | ... | and next hop of neighbour DUT interface IPv4 address.
+| |
+| | ... | *Arguments:*
+| | ... | - remote_host1_ip - IP address of remote host1 (Optional).
+| | ... | Type: string
+| | ... | - remote_host2_ip - IP address of remote host2 (Optional).
+| | ... | Type: string
+| |
+| | ... | *Example:*
+| |
+| | ... | \| Initialize IPv6 forwarding in circular topology \
+| | ... | \| 3ffe:5f::1 \| 3ffe:5f::2 \|
+| |
+| | [Arguments] | ${remote_host1_ip}=${NONE} | ${remote_host2_ip}=${NONE}
+| |
+| | ${dut2_status} | ${value}= | Run Keyword And Ignore Error
+| | ... | Variable Should Exist | ${dut2}
+| |
+| | Set interfaces in path up
+| |
+| | VPP Add IP Neighbor
+| | ... | ${dut1} | ${DUT1_${int}1}[0] | 2001:1::2 | ${TG_pf1_mac}[0]
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | VPP Add IP Neighbor
+| | ... | ${dut1} | ${DUT1_${int}2}[0] | 2001:3::2 | ${DUT2_${int}1_mac}[0]
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | VPP Add IP Neighbor
+| | ... | ${dut2} | ${DUT2_${int}1}[0] | 2001:3::1 | ${DUT1_${int}2_mac}[0]
+| | ${dut}= | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Set Variable | ${dut2}
+| | ... | ELSE | Set Variable | ${dut1}
+| | ${dut_if2}= | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Set Variable | ${DUT2_${int}2}[0]
+| | ... | ELSE | Set Variable | ${DUT1_${int}2}[0]
+| | VPP Add IP Neighbor
+| | ... | ${dut} | ${dut_if2} | 2001:2::2 | ${TG_pf2_mac}[0]
+| |
+| | VPP Interface Set IP Address
+| | ... | ${dut1} | ${DUT1_${int}1}[0] | 2001:1::1 | 64
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | VPP Interface Set IP Address
+| | ... | ${dut1} | ${DUT1_${int}2}[0] | 2001:3::1 | 64
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | VPP Interface Set IP Address
+| | ... | ${dut2} | ${DUT2_${int}1}[0] | 2001:3::2 | 64
+| | VPP Interface Set IP Address
+| | ... | ${dut} | ${dut_if2} | 2001:2::1 | 64
+| |
+| | Vpp Interfaces RA Suppress On All Nodes | ${nodes}
+| |
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Vpp Route Add | ${dut1} | 2001:2::0 | 64 | gateway=2001:3::2
+| | ... | interface=${DUT1_${int}2}[0]
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Vpp Route Add | ${dut2} | 2001:1::0 | 64 | gateway=2001:3::1
+| | ... | interface=${DUT2_${int}1}[0]
+| |
+| | Run Keyword Unless | '${remote_host1_ip}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut1} | ${remote_host1_ip} | 128
+| | ... | gateway=2001:1::2 | interface=${DUT1_${int}1}[0]
+| | Run Keyword Unless | '${remote_host2_ip}' == '${NONE}'
+| | ... | Vpp Route Add | ${dut} | ${remote_host2_ip} | 128
+| | ... | gateway=2001:2::2 | interface=${dut_if2}
+| | Run Keyword Unless | '${remote_host1_ip}' == '${NONE}'
+| | ... | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Vpp Route Add | ${dut1} | ${remote_host1_ip} | 128
+| | ... | gateway=2001:3::2 | interface=${DUT1_${int}2}[0]
+| | Run Keyword Unless | '${remote_host2_ip}' == '${NONE}'
+| | ... | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Vpp Route Add | ${dut2} | ${remote_host2_ip} | 128
+| | ... | gateway=2001:3::1 | interface=${DUT2_${int}1}[0]