-| VPP replies to ICMPv4 echo request
-| | TG interface "${nodes['TG']['interfaces']['port3']['name']}" can route to node "${nodes['DUT1']}" interface "${nodes['DUT1']['interfaces']['port1']['name']}" "0" hops away using IPv4
-| | Vpp dump stats table | ${nodes['DUT1']}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port1']['name']} | ${1}
-
-| TG can route to DUT egress interface
-| | TG interface "${nodes['TG']['interfaces']['port3']['name']}" can route to node "${nodes['DUT1']}" interface "${nodes['DUT1']['interfaces']['port3']['name']}" "0" hops away using IPv4
-| | Vpp dump stats table | ${nodes['DUT1']}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port1']['name']} | ${1}
-
-| TG can route to DUT2 through DUT1
-| | TG interface "${nodes['TG']['interfaces']['port3']['name']}" can route to node "${nodes['DUT2']}" interface "${nodes['DUT2']['interfaces']['port3']['name']}" "1" hops away using IPv4
-| | Vpp dump stats table | ${nodes['DUT1']}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port1']['name']} | ${1}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port3']['name']} | ${1}
-| | Vpp dump stats table | ${nodes['DUT2']}
-| | Check ipv4 interface counter | ${nodes['DUT2']} | ${nodes['DUT2']['interfaces']['port3']['name']} | ${1}
-
-| TG can route to DUT2 egress interface through DUT1
-| | TG interface "${nodes['TG']['interfaces']['port3']['name']}" can route to node "${nodes['DUT2']}" interface "${nodes['DUT2']['interfaces']['port1']['name']}" "1" hops away using IPv4
-| | Vpp dump stats table | ${nodes['DUT1']}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port1']['name']} | ${1}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port3']['name']} | ${1}
-| | Vpp dump stats table | ${nodes['DUT2']}
-| | Check ipv4 interface counter | ${nodes['DUT2']} | ${nodes['DUT2']['interfaces']['port3']['name']} | ${1}
-
-| TG can route to TG through DUT1 and DUT2
-| | TG interface "${nodes['TG']['interfaces']['port3']['name']}" can route to node "${nodes['TG']}" interface "${nodes['TG']['interfaces']['port5']['name']}" "2" hops away using IPv4
-| | Vpp dump stats table | ${nodes['DUT1']}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port1']['name']} | ${1}
-| | Check ipv4 interface counter | ${nodes['DUT1']} | ${nodes['DUT1']['interfaces']['port3']['name']} | ${1}
-| | Vpp dump stats table | ${nodes['DUT2']}
-| | Check ipv4 interface counter | ${nodes['DUT2']} | ${nodes['DUT2']['interfaces']['port3']['name']} | ${1}
-| | Check ipv4 interface counter | ${nodes['DUT2']} | ${nodes['DUT2']['interfaces']['port1']['name']} | ${1}
+| TC01: DUT replies to ICMPv4 Echo Req to its ingress interface
+| | [Documentation]
+| | ... | Make TG send ICMPv4 Echo Req to DUT ingress interface. Make TG\
+| | ... | verify ICMP Echo Reply is correct.
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | VM_ENV
+| | Append Nodes | ${nodes['TG']} | ${nodes['DUT1']}
+| | Compute Path
+| | ${src_port} | ${src_node}= | First Interface
+| | ${dst_port} | ${dst_node}= | Last Interface
+| | ${hops}= | Set Variable | ${0}
+| | Node "${src_node}" interface "${src_port}" can route to node "${dst_node}" interface "${dst_port}" ${hops} hops away using IPv4
+
+| TC02: DUT routes IPv4 to its egress interface
+| | [Documentation]
+| | ... | Make TG send ICMPv4 Echo Req towards DUT1 egress interface\
+| | ... | connected to DUT2. Make TG verify ICMPv4 Echo Reply is correct.
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | VM_ENV
+| | Append Nodes | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['DUT2']}
+| | Compute Path
+| | ${src_port} | ${src_node}= | First Interface
+| | ${dst_port} | ${dst_node}= | Last Egress Interface
+| | ${hops}= | Set Variable | ${0}
+| | Node "${src_node}" interface "${src_port}" can route to node "${dst_node}" interface "${dst_port}" ${hops} hops away using IPv4
+
+| TC03: DUT1 routes IPv4 to DUT2 ingress interface
+| | [Documentation]
+| | ... | Make TG send ICMPv4 Echo Req towards DUT2 ingress interface\
+| | ... | connected to DUT1. Make TG verify ICMPv4 Echo Reply is correct.
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | VM_ENV
+| | Append Nodes | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['DUT2']}
+| | Compute Path
+| | ${src_port} | ${src_node}= | First Interface
+| | ${dst_port} | ${dst_node}= | Last Interface
+| | ${hops}= | Set Variable | ${1}
+| | Node "${src_node}" interface "${src_port}" can route to node "${dst_node}" interface "${dst_port}" ${hops} hops away using IPv4
+
+| TC04: DUT1 routes IPv4 to DUT2 egress interface
+| | [Documentation]
+| | ... | Make TG send ICMPv4 Echo Req towards DUT2 egress interface\
+| | ... | connected to TG. Make TG verify ICMPv4 Echo Reply is correct.
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | VM_ENV
+| | Append Nodes | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['DUT2']} | ${nodes['TG']}
+| | Compute Path
+| | ${src_port} | ${src_node}= | First Interface
+| | ${dst_port} | ${dst_node}= | Last Egress Interface
+| | ${hops}= | Set Variable | ${1}
+| | Node "${src_node}" interface "${src_port}" can route to node "${dst_node}" interface "${dst_port}" ${hops} hops away using IPv4
+
+| TC05: DUT1 and DUT2 route IPv4 between TG interfaces
+| | [Documentation]
+| | ... | Make TG send ICMPv4 Echo Req between its interfaces across DUT1\
+| | ... | and DUT2. Make TG verify ICMPv4 Echo Replies are correct.
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | VM_ENV
+| | Append Nodes | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['DUT2']} | ${nodes['TG']}
+| | Compute Path
+| | ${src_port} | ${src_node}= | First Interface
+| | ${dst_port} | ${dst_node}= | Last Interface
+| | ${hops}= | Set Variable | ${2}
+| | Node "${src_node}" interface "${src_port}" can route to node "${dst_node}" interface "${dst_port}" ${hops} hops away using IPv4
+| | ${port} | ${node}= | Next Interface
+| | ${port} | ${node}= | Next Interface
+| | ${exp_counter_val}= | Set Variable | ${1}
+| | Vpp dump stats table | ${node}
+| | Check ipv4 interface counter | ${node} | ${port} | ${exp_counter_val}
+| | ${port} | ${node}= | Next Interface
+| | Check ipv4 interface counter | ${node} | ${port} | ${exp_counter_val}
+| | ${port} | ${node}= | Next Interface
+| | Vpp dump stats table | ${node}
+| | Check ipv4 interface counter | ${node} | ${port} | ${exp_counter_val}
+| | ${port} | ${node}= | Next Interface
+| | Check ipv4 interface counter | ${node} | ${port} | ${exp_counter_val}
+
+| TC06: DUT replies to ICMPv4 Echo Reqs with size 64B-to-1500B-incr-1B
+| | [Documentation]
+| | ... | Make TG send ICMPv4 Echo Reqs to DUT ingress interface,\
+| | ... | incrementating frame size from 64B to 1500B with increment step
+| | ... | of 1Byte. Make TG verify ICMP Echo Replies are correct.
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | VM_ENV
+| | Ipv4 icmp echo sweep | ${nodes['TG']} | ${nodes['DUT1']} | 0 | 1452 | 1
+
+| TC07: DUT replies to ICMPv4 Echo Reqs with size 1500B-to-9000B-incr-10B
+| | [Documentation]
+| | ... | Make TG send ICMPv4 Echo Reqs to DUT ingress interface,\
+| | ... | incrementating frame size from 1500B to 9000B with increment
+| | ... | step of 10Bytes. Make TG verify ICMPv4 Echo Replies are correct.
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO
+| | [Setup] | Setup MTU on TG based on MTU on DUT | ${nodes['TG']} | ${nodes['DUT1']}
+| | [Teardown] | Set default Ethernet MTU on all interfaces on node | ${nodes['TG']}
+| | Append Nodes | ${nodes['TG']} | ${nodes['DUT1']}
+| | Compute Path
+| | ${dut_port} | ${dut_node}= | Last Interface
+| | ${mtu}= | Get Interface MTU | ${dut_node} | ${dut_port}
+| | # ICMP payload size is frame size minus size of Ehternet header, FCS,
+| | # IPv4 header and ICMP header
+| | ${end_size}= | Evaluate | ${mtu} - 14 - 4 - 20 - 8
+| | Run Keyword If | ${mtu} > 1518
+| | ... | Ipv4 icmp echo sweep | ${nodes['TG']} | ${nodes['DUT1']}
+| | ... | 1452 | ${end_size} | 10
+
+| TC08: DUT replies to ARP request
+| | [Documentation]
+| | ... | Make TG send ARP Request to DUT and verify ARP Reply is correct.\
+| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | VM_ENV
+| | Send ARP request and validate response | ${nodes['TG']} | ${nodes['DUT1']}