What is OSPF domain ID?

On Cisco IOS, the OSPF Domain ID is the OSPF Process ID by default. The Domain ID is configurable using domain-id type value command from OSPF router configuration on the PE routers for a particular VRF instance. The Domain ID is an 8-byte quantity that is a valid BGP Extended Community Attribute.

Does Mpls use OSPF?

The BGP/MPLS VPN backbone acts as either an OSPF backbone (area 0) or an OSPF area above the backbone. In this topology, OSPF is the routing protocol between the CE router and the PE router. This OSPF link can be configured in area 0 or any other OSPF area.

What is the difference between MPLS and OSPF?

A comparison of MPLS and OSPF protocols is presented. The details of both protocols are listed. The OPNET network simulator is used to compare protocol performance in the aspects of throughput, utilization,and delay It is found that the OSPF protocol is showing higher throughput ranges than the MPLS protocol.

Which IP protocol ID does OSPF use?

IP protocol number 89
OSPF Packets OSPF messages ride directly inside of IP packets as IP protocol number 89.

What is domain ID in networking?

domain-id —You can specify either an IP address or an IP address and a local identifier using the following format: ip-address : local-identifier . If you do not specify a local identifier with the IP address, the identifier is assumed to have a value of 0.

When using MPLS and OSPF What is the role of PE router?

When using MPLS and OSPF, the PE routers function as what? Answer B. Every area must connect back to the backbone area, or area 0.

What is the protocol used by MPLS?

MPLS is considered a layer 2.5 networking protocol. Layer 2 carries IP packets over simple LANs or point-to-point WANs, while layer 3 uses internet-wide addressing and routing using IP protocols. MPLS sits in between, with additional features for data transport across the network.

Why IGP is used in MPLS?

IGP in an MPLS network advertises the internal topology. It provides connectivity for MP-BGP inside the network. The routing table in every router is also used by LDP to generate labels for every route.

How is OSPF router ID determined?

Each OSPF router selects a router ID (RID) that has to be unique on your network. OSPF stores the topology of the network in its LSDB (Link State Database) and each router is identified with its unique router ID , if you have duplicate router IDs then you will run into reachability issues.

What is the router ID for OSPF and why do we need it?

The router ID is an identification number for uniquely identifying each OSPF router in the network. You need to specify so that it does not overlap among multiple routers. As a router ID, it is a good idea to use the IP address given to the interface of the router.