Understanding of the OSPF LSA

Routing information: LSA1 (in-domain), LSA3 (domain), LSA5 (extraterritorial)

Topology Information: Pending completion

Summary of OSPF LSA and stub

Lsa:1

1: Each router will produce a class of LSA it contains all the link extremely prefix and mask information, link type.

2: Identify your own Route-id number (who generated this LSA)

3: Can not cross ABR, only in the region flooding

4: View the way: #sh IP OSPF database rouer

5: Oneself produce, oneself notice

Lsa:2

1: Generated by Dr in this broadcast domain, and notices

2: Include the link information that belongs to

3: Basically the environment for broadcasting and NBMA

4: Not through ABR, only in the region flooding.

5: View mode: r2# SH IP OSPF database network

Lsa:3

Viewing mode: #sh IP OSPF Database summary

1: By ABR initialization, flood scope for the entire OSPF autonomous management system.

2: Default OSPF not rollup, but still produce three class LSA

Lsa;4

1, by ABR initialization, flood range for the entire OSPF autonomous management system

2, but in the transfer process, must retain the ASBR Router-id number

3, if you want to appear lsa4 must introduce an external route

Lsa:5

1: The notifier are all ASBR

2: In the OSPF autonomous management system, no matter where, the notifier's ID is unchanged.

3:LSA4 must find ASBR first.