Multiprotocol Label Switching - MPLS VPNs - The Solution: MPLS VPNs

7 important questions on Multiprotocol Label Switching - MPLS VPNs - The Solution: MPLS VPNs

What is the definition of Customer edge (CE)?

-CE is a router with no knowledge of MPLS protocol
-CE is directly connect to an LSR (PE) in the MPLS VPN

What is the definition of Provider edge (PE)?

-PE is a LSR that share a link with at least one CE router
-PE providing a function to the edge of MPLS vpn, including BGP (iBGP) and VRF

What is the definition of Provider (P)?

-P does not have a direct link to a CE router
-Only forward label packets
-Ignore customer VPN's routers
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

In what does the PE router put learned routes of the Customer?

In VRFs

PEs store routes in separate per customer routing tables, called VRFs

Which protocol is used by PE to exchange routes with other PEs?

iBGP

What is an Outer MPLS header?

A label value that cause the packet to be label switched to the egress PE (S-bit=0)

What is an inner MPLS header?

A label that identifies the egress VRF on with to base the forwarding decision

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo