Contents
What is opaque LSA in OSPF?
Opaque LSAs provide a generalized mechanism to allow for the future extensibility of OSPF. Opaque LSAs consist of a standard LSA header followed by application-specific information. The information field may be used directly by OSPF or by other applications.
What is the use of LSA in OSPF?
The link-state advertisement (LSA) is a basic communication means of the OSPF routing protocol for the Internet Protocol (IP). It communicates the router’s local routing topology to all other local routers in the same OSPF area.
How does OSPF LSA work?
LSA Type 1 – OSPF Router LSA LSA Type 1 (Router LSA) packets are sent between routers within the same area of origin and do not leave the area. An OSPF router uses LSA Type 1 packets to describe its own interfaces but also carries information about its neighbors to adjacent routers in the same area.
How many types of LSA are there in OSPF?
6 Types
6 Types of OSPF LSA.
How are opaque LSAs used in OSPF traffic engineering?
Opaque LSAs are used for MPLS Traffic-Engineering (I will write more blogs on these soon) and are generated by OSPF when we enable traffic-engineering. Check example below. As soon as we enter this command, we see that the Type-10 Opaque LSA enters the OSPF Database.
How can the CR-LDP know what information about OSPF?
But in OSPF , when there is a change in an area, the LSA will flood to all. So if there is an application transfer a file on the link, the BW will change continuosly (?), so the LSA will flood and how can the CR-LDP know what information about BW on that link to use.
When to use opaque in MPLS Traffic Engineering?
1.MPLS traffic engineering use opaque (LSA type 9,10,11) to get eg. BW of the link! But in OSPF , when there is a change in an area, the LSA will flood to all.
Which is LSA type used for MPLS-TE?
A4) Only the lsa type 10 (area-local scope) is used for MPLS TE. Introduction In EVPN A/A + IRB both PE in same EVI have BVI playing a default GW role. Its not supported to have BVI to be shutdown on one of PEs, In this case if if traffic hit this PE with DMAc equal to BVI Custom MAC, then it will drop this traffic du… view more