Question 730
A service provider uses BGP VPLS signaling for a four-site customer. Observed: One site never joins the full mesh despite a healthy BGP session. What evidence would validate recovery from this precise failure mode?
Explanation
Correct Answer
The intended result is All intended remote PEs build their customer VPLS peer connections. It specifically verifies recovery from the site's vpls nlri or rt export settings are incomplete, which produced the original symptom: One site never joins the full mesh despite a healthy BGP session. It is stronger evidence than a generic interface-up indicator.
Incorrect Answers
This result is useful in another case with evidence The same customer MAC repeatedly moves without a real host migration. It does not test recovery from one site never joins the full mesh despite a healthy bgp session. Check instead whether all intended remote PEs build their customer VPLS peer connections.
That observation would verify a separate fault involving active pseudowires violate the intended loop-prevention or multihoming design. Its symptom is MAC movement and broadcast storms appear after both CE ports activate. For this case the actual issue is the site's vpls nlri or rt export settings are incomplete, and the relevant success signal is All intended remote PEs build their customer VPLS peer connections.
It confirms an unrelated service correction: The local and remote virtual circuit identifiers do not match. The present case reports One site never joins the full mesh despite a healthy BGP session. Its completion test is All intended remote PEs build their customer VPLS peer connections.