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+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Library | resources.libraries.python.NodePath
+| Library | resources.libraries.python.Trace
+| Resource | resources/libraries/robot/default.robot
+| Resource | resources/libraries/robot/interfaces.robot
+| Resource | resources/libraries/robot/ipv4.robot
+| Force Tags | HW_ENV
+| Suite Setup | Run Keywords | Setup all DUTs before test
+| ...         | AND          | Setup all TGs before traffic script
+| ...         | AND          | Update All Interface Data On All Nodes | ${nodes}
+| ...         | AND          | Setup DUT nodes for IPv4 testing
+| Test Setup | Clear interface counters on all vpp nodes in topology | ${nodes}
+| Test Teardown | Run Keyword If Test Failed | Show packet trace on all DUTs | ${nodes}
+| ...           | AND                        | Show vpp trace dump on all DUTs
+| Documentation | *IPv4 routing test cases*
+| ...
+| ... | RFC791 IPv4, RFC826 ARP, RFC792 ICMPv4. Encapsulations: Eth-IPv4-ICMPv4
+| ... | on links TG-DUT1, TG-DUT2, DUT1-DUT2. IPv4 routing tests use circular
+| ... | 3-node topology TG - DUT1 - DUT2 - TG with one link between the nodes.
+| ... | DUT1 and DUT2 are configured with IPv4 routing and static routes. Test
+| ... | ICMPv4 Echo Request packets are sent in both directions by TG on links
+| ... | to DUT1 and DUT2 and received on TG links on the other side of circular
+| ... | topology. On receive TG verifies packets IPv4 src-addr, dst-addr and MAC
+| ... | addresses.
+
+*** Test Cases ***
+
+| 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']}