JN0-664: Service Provider Routing and Switching, ProfessionalDemo

By Juniper · Question Mode

QuestionQ15

Layer 2 VPNs

Which two statements about VPLS tunnels are correct?

Choose two
  • A BGP-signaled VPLS tunnels require manual provisioning of sites.
  • B LDP-signaled VPLS tunnels only support control bit 0.
  • C LDP-signaled VPLS tunnels use auto-discovery to provision sites.
  • D BGP-signaled VPLS tunnels can use either RSVP or LDP between the PE routers.
Explanation

LDP-signaled VPLS supports control bit 0 in the Junos implementation. BGP VPLS signaling is independent of the MPLS transport-LSP signaling protocol, so PE-to-PE transport can use either RSVP-signaled or LDP-signaled LSPs. BGP VPLS also provides autodiscovery, rather than requiring manual configuration of all remote sites.

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