+| | ... | ${dut1} | ${DUT1_${int}2}[0] | 2001:200::2 | ${TG_pf2_mac}[0]
+| | Vpp Route Add | ${dut1} | 2001:1::0 | 64 | gateway=2001:100::2
+| | ... | interface=${DUT1_${int}1}[0] | vrf=${fib_table_1}
+| | Vpp Route Add | ${dut1} | 2001:2::0 | 64 | gateway=2001:200::2
+| | ... | interface=${DUT1_${int}2}[0] | vrf=${fib_table_2}
+| | FOR | ${number} | IN RANGE | 1 | ${nf_nodes}+1
+| | | ${fib_table_1}= | Evaluate | ${100}+${number}
+| | | ${fib_table_2}= | Evaluate | ${fib_table_1}+${1}
+| | | Configure vhost interfaces | ${dut1}
+| | | ... | /var/run/vpp/sock-${number}-1 | /var/run/vpp/sock-${number}-2
+| | | ... | dut1-vhost-${number}-if1 | dut1-vhost-${number}-if2
+| | | ... | virtio_feature_mask=${virtio_feature_mask}
+| | | Set Interface State | ${dut1} | ${dut1-vhost-${number}-if1} | up
+| | | Set Interface State | ${dut1} | ${dut1-vhost-${number}-if2} | up
+| | | Add Fib Table | ${dut1} | ${fib_table_1} | ipv6=${True}
+| | | Add Fib Table | ${dut1} | ${fib_table_2} | ipv6=${True}
+| | | Assign Interface To Fib Table | ${dut1} | ${dut1-vhost-${number}-if1}
+| | | ... | ${fib_table_1} | ipv6=${True}
+| | | Assign Interface To Fib Table | ${dut1} | ${dut1-vhost-${number}-if2}
+| | | ... | ${fib_table_2} | ipv6=${True}
+| | | VPP Interface Set IP Address
+| | | ... | ${dut1} | ${dut1-vhost-${number}-if1} | 1:1::2 | 64
+| | | VPP Interface Set IP Address
+| | | ... | ${dut1} | ${dut1-vhost-${number}-if2} | 1:2::2 | 64
+| | | Vpp Route Add | ${dut1} | 2001:2::0 | 64 | gateway=1:1::1
+| | | ... | interface=${dut1-vhost-${number}-if1} | vrf=${fib_table_1}
+| | | Vpp Route Add | ${dut1} | 2001:1::0 | 64 | gateway=1:2::1
+| | | ... | interface=${dut1-vhost-${number}-if2} | vrf=${fib_table_2}
+| | END
+
+| Initialize IPv6 forwarding with VLAN dot1q sub-interfaces in circular topology
+| | [Documentation]
+| | ... | Set UP state on VPP interfaces in path on nodes in 2-node / 3-node
+| | ... | circular topology. In case of 3-node topology create VLAN
+| | ... | sub-interfaces between DUTs. In case of 2-node topology create VLAN
+| | ... | sub-interface on dut1-if2 interface. Get the interface MAC addresses
+| | ... | and setup ARPs. Setup IPv6 addresses with /64 prefix on DUT-TG links
+| | ... | and set routing with prefix /64. In case of 3-node set IPv6 adresses
+| | ... | with /64 prefix on VLAN and set routing on both DUT nodes with prefix
+| | ... | /64. Set next hop of neighbour DUT interface IPv6 address. All
+| | ... | interfaces are brought up.
+| |
+| | ... | *Arguments:*
+| | ... | - tg_if1_net - TG interface 1 IPv6 subnet used by traffic generator.
+| | ... | Type: integer
+| | ... | - tg_if2_net - TG interface 2 IPv6 subnet used by traffic generator.
+| | ... | Type: integer
+| | ... | - subid - ID of the sub-interface to be created. Type: string
+| | ... | - tag_rewrite - Method of tag rewrite. Type: string
+| |
+| | ... | _NOTE:_ This KW uses following test case variables:
+| | ... | - dut1 - DUT1 node.
+| | ... | - dut2 - DUT2 node.
+| | ... | - dut1_if2 - DUT1 interface towards DUT2.
+| | ... | - dut2_if1 - DUT2 interface towards DUT1.
+| |
+| | ... | *Example:*
+| |
+| | ... | \| Initialize IPv6 forwarding with VLAN dot1q sub-interfaces\
+| | ... | in circular topology \| 2001:1::0 \| 2001:2::0 \| 10 \| pop-1 \|
+| |
+| | [Arguments] | ${tg_if1_net} | ${tg_if2_net} | ${subid} | ${tag_rewrite}
+| |
+| | ${dut2_status} | ${value}= | Run Keyword And Ignore Error
+| | ... | Variable Should Exist | ${dut2}
+| |
+| | Set interfaces in path up
+| |
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Initialize VLAN dot1q sub-interfaces in circular topology
+| | ... | ${dut1} | ${DUT1_${int}2}[0]
+| | ... | ${dut2} | ${DUT2_${int}1}[0] | SUB_ID=${subid}
+| | ... | ELSE | Initialize VLAN dot1q sub-interfaces in circular topology
+| | ... | ${dut1} | ${DUT1_${int}2}[0] | SUB_ID=${subid}
+| | Run Keyword If | '${dut2_status}' == 'PASS'
+| | ... | Configure L2 tag rewrite method on interfaces
+| | ... | ${dut1} | ${subif_index_1}
+| | ... | ${dut2} | ${subif_index_2} | TAG_REWRITE_METHOD=${tag_rewrite}
+| | ... | ELSE | Configure L2 tag rewrite method on interfaces
+| | ... | ${dut1} | ${subif_index_1} | TAG_REWRITE_METHOD=${tag_rewrite}
+| |
+| | ${prefix}= | Set Variable | 64
+| | ${host_prefix}= | Set Variable | 64