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BFD-OSPF-test-plan.md

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Bidirectional Forwarding Detection (BFD) and OSPF Interoperability

Test Plan Revision History

Rev Date Author Change Description
1 05/03/2024 Ghulam Bahoo Initial Version of test plan

Introduction

Objective

The purpose of this test is to evaluate the functionality of BFD in conjunction with the OSPF protocol on the SONIC switch DUT. The test assumes all standard topology configurations, such as BGP neighborship, are pre-configured in the DUT and neighboring systems with no OSPF configurations. It is also assumed that neighboring devices are all SONiC devices.

Scope

  • Test BFD functionality in conjunction with OSPF protocol.

NOTE: OSPF Routing tests will run on all Tier 0 and Tier 1 topologies where neighboring devices are SONiC devices.

Definition/Abbreviation

Term Meaning
BFD Bidirectional Forwarding Detection
OSPF Open Shortest Path First

Related DUT CLI Commands

Commands Comment
Configuration commands
no router bgp Disable BGP instance on DUT
router ospf Instanciate OSPF instance on DUT
network x.x.x.x/x area x Advertise network
bfd Opens the BFD daemon configuration mode
peer x.x.x.x Configure BFD peer
interface Ethernet x Enters into interface configuration mode
ip ospf bfd Listen for BFD events on peers created on the interface
Show commands
Show ip ospf show all information about ospf
Show ip ospf neighbors show all information about OSPF neighbors
Show bfd peer Show all configured BFD peers information and current status

Test Structure

Setup Configuration

The test assumes all standard configurations, such as BGP neighborship, are pre-configured in the DUT and neighboring systems with no OSPF configurations. It is also assumed that the neighboring devices are of SONiC type.

Testbed Setup

The test will run on the t0 and t1 testbed:

Tier 0 (t0)

Variation t0

Tier 1 (t1)

Variation t1

Test Cases

Test Case #0 - Test OSPF Neighborship Status

Test Objective

Verify whether OSPF neighbors are successfully created and appear with active status.

Test Steps

  1. Clear existing default routing configurations (if non-OSPF configurations)
  2. Establish OSPF session between DUT and neighbors
  3. Verify OSPF neighbors are successfully established with active status
  4. Restore original routing configurations (if non-OSPF configurations)

Test Case #1 - Test BFD Neighborship Status

Test Objective

Verify whether BFD neighborship is successfully created between DUT and its neighbors and whether they are sharing BFD packets.

Test Steps

  1. Clear existing default routing configurations (if non-OSPF configurations)
  2. Establish BFD session between DUT and neighbors
  3. Verify BFD packets are being shared between BFD peers.
  4. Restore original routing configurations (if non-OSPF configurations)

Test Case #2 - Test Dynamic Switching of Network Traffic

Test Objective

Verify whether BFD is reporting a link failure to OSPF and whether it is dynamically switching the network traffic to other available routes in response to a link failure.

Test Steps

  1. Clear existing default routing configurations (if non-OSPF configurations)
  2. Establish BFD session between DUT and neighbors
  3. Simulate one link failure
  4. Verify whether BFD is dynamically switching the network traffic to other available routes
  5. Restore original routing configurations (if non-OSPF configurations)