VIAVI TestCenter: What is the behavior of the Routing convergence, RFC-6413 rate based convergence when there are drops?

VIAVI TestCenter: What is the behavior of the Routing convergence, RFC-6413 rate based convergence when there are drops?

• The existing Routing convergence wizard is based on Rate based convergence using RFC 6413. • In 4.47 we will be adding support for control plane convergence with trigger event timestamp measurement. • The DUT should not show packet loss at the start of the test. • In Rate based convergence, the test measures expected RX rate on the primary port before convergence. • Then after convergence trigger event, the traffic rate on backup port is  expected to reach within 95% of rate observed on the Primary port after the start of the test. • Then the test is considered converged. • During Setup Routing Convergence” the traffic rate is being sampled at the RX ports and there should be no loss. • Is there packet loss at the start of the test? • If sequencer fails at “Wait for Data Plane Samples” step, this implies rate on back up port is not reaching expected rate. • Regarding the questions: • Any rate, not only100% can be used but  the lower the traffic rate the longer it will take to measure convergence. • Convergence is calculated based on rate reaching expected rate  RFC 6413.  • There should be no drops during rate sampling at the start of the test. • There is a new methodology in 4.47 for control plane trigger event base convergence. • This is not based on rate or loss. • This is based on trigger event timestamp and arrival time of each stream.