2.27. test_ip4_vrf_multi_instance module

IP4 VRF Multi-instance Test Case HLD:

NOTES:
  • higher number of pg-ip4 interfaces causes problems => only 15 pg-ip4 interfaces in 5 VRFs are tested
  • jumbo packets in configuration with 15 pg-ip4 interfaces leads to problems too
  • Reset of FIB table / VRF does not remove routes from IP FIB (see Jira ticket https://jira.fd.io/browse/VPP-560) so checks of reset VRF tables are skipped in tests 2, 3 and 4
config 1
  • add 15 pg-ip4 interfaces
  • configure 5 hosts per pg-ip4 interface
  • configure 4 VRFs
  • add 3 pg-ip4 interfaces per VRF
test 1
  • send IP4 packets between all pg-ip4 interfaces in all VRF groups
verify 1
  • check VRF data by parsing output of ip_fib_dump API command
  • all packets received correctly in case of pg-ip4 interfaces in VRF
  • no packet received in case of pg-ip4 interfaces not in VRF
config 2
  • delete 2 VRFs
test 2
  • send IP4 packets between all pg-ip4 interfaces in all VRF groups
verify 2
  • check VRF data by parsing output of ip_fib_dump API command
  • all packets received correctly in case of pg-ip4 interfaces in VRF
  • no packet received in case of pg-ip4 interfaces not in VRF
config 3
  • add 1 of deleted VRFs and 1 new VRF
test 3
  • send IP4 packets between all pg-ip4 interfaces in all VRF groups
verify 3
  • check VRF data by parsing output of ip_fib_dump API command
  • all packets received correctly in case of pg-ip4 interfaces in VRF
  • no packet received in case of pg-ip4 interfaces not in VRF
config 4
  • delete all VRFs (i.e. no VRF except VRF=0 created)
test 4
  • send IP4 packets between all pg-ip4 interfaces in all VRF groups
verify 4
  • check VRF data by parsing output of ip_fib_dump API command
  • all packets received correctly in case of pg-ip4 interfaces in VRF
  • no packet received in case of pg-ip4 interfaces not in VRF
class test_ip4_vrf_multi_instance.TestIp4VrfMultiInst(methodName='runTest')

Bases: framework.VppTestCase

IP4 VRF Multi-instance Test Case

create_stream(src_if, packet_sizes)

Create input packet stream for defined interface using hosts list.

Parameters:
  • src_if (object) – Interface to create packet stream for.
  • packet_sizes (list) – List of required packet sizes.
Returns:

Stream of packets.
create_vrf_and_assign_interfaces(count, start=1)

Create required number of FIB tables / VRFs, put 3 l2-pg interfaces to every FIB table / VRF.

Parameters:
  • count (int) – Number of FIB tables / VRFs to be created.
  • start (int) – Starting number of the FIB table / VRF ID. (Default value = 1)
delete_vrf(vrf_id)

Delete required FIB table / VRF.

Parameters:vrf_id (int) – The FIB table / VRF ID to be deleted.
run_verify_test()
Create packet streams for all configured l2-pg interfaces, send all prepared packet streams and verify that:
  • all packets received correctly on all pg-l2 interfaces assigned to bridge domains
  • no packet received on all pg-l2 interfaces not assigned to bridge domains
Raises:RuntimeError – If no packet captured on l2-pg interface assigned to the bridge domain or if any packet is captured on l2-pg interface not assigned to the bridge domain.
setUp()

Clear trace and packet infos before running each test.

classmethod setUpClass()

Perform standard class setup (defined by class method setUpClass in class VppTestCase) before running the test case, set test case related variables and configure VPP.

tearDown()

Show various debug prints after each test.

test_ip4_vrf_01()

IP4 VRF Multi-instance test 1 - create 5 BDs

test_ip4_vrf_02()

IP4 VRF Multi-instance test 2 - delete 2 VRFs

test_ip4_vrf_03()

IP4 VRF Multi-instance 3 - add 2 VRFs

test_ip4_vrf_04()

IP4 VRF Multi-instance test 4 - delete 4 VRFs

verify_capture(pg_if, capture)

Verify captured input packet stream for defined interface.

Parameters:
  • pg_if (object) – Interface to verify captured packet stream for.
  • capture (list) – Captured packet stream.
verify_vrf(vrf_id)

Check if the FIB table / VRF ID is configured.

Parameters:vrf_id (int) – The FIB table / VRF ID to be verified.
Returns:1 if the FIB table / VRF ID is configured, otherwise return 0.
test_ip4_vrf_multi_instance.is_ipv4_misc(p)

Is packet one of uninteresting IPv4 broadcasts?