Overview¶
Virtual Topologies¶
CSIT NSH_SFC functional tests are executed in VM-based virtual topologies created on demand using VIRL simulation platform contributed by Cisco. VIRL runs on physical baremetal servers hosted by LF FD.io project. All tests are executed in three-node virtual test topology shown in the figure below.
SUT1 and SUT2 are two VMs (running Ubuntu or Centos, depending on the test suite), TG is a Traffic Generator (running Ubuntu VM). SUTs run VPP with nsh-plugin in Linux user-mode as a Device Under Test (DUT) within the VM. TG runs Scapy SW application as a packet Traffic Generator. Network connectivity between SUTs and to TG is provided using virtual NICs and VMs’ virtio drivers.
Functional Tests Coverage¶
CSIT-18.07 includes following NSH_SFC functionality tested in virtual VM environment:
| Functionality | Description |
|---|---|
| NSH SFC Classifier | TG sends some TCP packets to test NSH SFC Classifier functional. DUT1 will receive these packets from one NIC and loopback the VXLAN-GPE-NSH encapsulated packets to the TG from other NIC. Test case count: 7. |
| NSH SFC Proxy Inbound | TG sends some VXLAN-GPE-NSH encapsulated packets to test NSH SFC Proxy Inbound functional. DUT1 will receive these packets from one NIC and loopback the VXLAN encapsulated packets to the TG from other NIC. Test case count: 6. |
| NSH SFC Proxy Outbound | TG sends some VXLAN encapsulated packets to test NSH SFC Proxy Outbound functional. DUT1 will receive these packets from one NIC and loopback the VXLAN-GPE-NSH encapsulated packets to the TG from other NIC. Test case count: 6. |
| NSH SFC Service Function Forward | TG sends some VXLAN-GPE-NSH encapsulated packets to test NSH SFC Service Function Forward functional. DUT1 will receive these packets from one NIC and swap the VXLAN-GPE-NSH header, after that DUT1 loopback the VXLAN-GPE-NSH encapsulated packets to the TG from other NIC. Test case count: 6. |
Total 25 NSH_SFC functional tests in the CSIT-18.07.