What is MP-BGP in MPLS?

Multiprotocol BGP (MP-BGP) is an extension to BGP that enables BGP to carry routing information for multiple network layers and address families. MP-BGP can carry the unicast routes used for multicast routing separately from the routes used for unicast IP forwarding.

Is BGP required for MPLS?

These routers must be able to switch MPLS LSPs—that is, they function as MPLS label-switching routers (LSRs) and might function as label edge routers (LERs). Running BGP-4 on the P routers is not necessary to be able to exchange routing information for VPNs. Using MPLS is not necessary.

What is MP-BGP can we use normal BGP in lieu of MP iBGP?

MP-BGP (Multiprotocol BGP) is an extensions to BGP protocol. Standard BGP only supports IPv4 unicast address family, whereas MP-BGP supports more than 15 different BGP address families.

Why VRF is used?

Virtual routing and forwarding (VRF) IP technology allows users to configure multiple routing table instances to simultaneously co-exist within the same router. Overlapping IP addresses can be used without conflicting because the multiple routing instances are independent, and can select different outgoing interfaces.

How does MPLS use BGP?

When MPLS cloud is utilized at core, BGP can be deployed at the network edges with the core routers carrying just the information about the BGP’s next step. BGP establishes loop-free routes and share routing information among the group of routers (autonomous systems). MPLS cloud does not scatter BGP across the network.

Does BGP use multicast?

Multicast BGP is an enhanced BGP that allows the deployment of interdomain IPv6 multicast. Multiprotocol BGP carries routing information for multiple network layer protocol address families; for example, IPv6 address family and for IPv6 multicast routes.

What is Unicast BGP?

BGP multicasting (MBGP) is an extension of the BGP unicast routing protocol. Many of the functions available for BGP unicasting are also available for MBGP. The MBGP extensions specify that BGP can exchange information within different types of address families.

What is the difference between VPN and VRF?

Virtual Routing and Forwarding (VRF) is an IP technology that allows multiple instances of a routing table to coexist on the same router at the same time. “VRF” is also used to refer to a routing table instance that can exist in one or multiple instances per each VPN on a Provider Edge (PE) router.