Which two statements are correct about VPLS tunnels? (Choose two.)

Which two statements are correct about VPLS tunnels? (Choose two.)
A . LDP-signaled VPLS tunnels only support control bit 0.
B . LDP-signaled VPLS tunnels use auto-discovery to provision sites
C . BGP-signaled VPLS tunnels can use either RSVP or LDP between the PE routers.
D . BGP-signaled VPLS tunnels require manual provisioning of sites.

View Answer

Answer: B,D

Explanation:

In the context of Virtual Private LAN Service (VPLS) and the signaling protocols used to establish VPLS tunnels:

LDP-signaled VPLS tunnels use auto-discovery to provision sites. In LDP-signaled VPLS, auto-discovery is used to discover other PE routers that are part of the same VPLS instance. This is typically done through the exchange of LDP messages that carry VPLS labels.

BGP-signaled VPLS tunnels require manual provisioning of sites. When using BGP for signaling in VPLS (also known as BGP-based VPLS), each site needs to be manually provisioned. This includes configuring the site identifier and the parameters for the VPLS instance on the PE router.