# OSPFv2 vs OSPFv3 **URL:** https://forum.networklessons.com/t/ospfv2-vs-ospfv3/2073 **Category:** Lessons Discussion **Created:** [August 22, 2017, 12:54pm UTC](https://forum.networklessons.com/t/ospfv2-vs-ospfv3/2073 "2017-08-22T12:54:22Z") **Posts on this page:** 1 **Showing post:** 6
### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis) #### Post date: [February 2, 2021, 3:01pm UTC](https://forum.networklessons.com/t/ospfv2-vs-ospfv3/2073/6 "2021-02-02T15:01:49Z")
Hello Marios Actually, if you take a closer look at Type 3 and Type 4 LSAs, you will find that they are not flooded throughout **the whole AS scope**. Looking at the related lesson about OSPFv2 LSAs, you can see that both are generated by an ABR that receives a Type 1 LSA. They are flooded to the rest of the network, **but not in the OSPF area from which the Type 1 LSA is received**. > **[OSPF LSA Types Explained](https://networklessons.com/ospf/ospf-lsa-types-explained)** > > This lesson explains the OSPF LSA Types and where we encounter them. We also look how to check them on Cisco IOS routers. The only LSA that truly exists throughout the whole AS in all OSPF areas is a Type 5 LSA, and it is the only one that begins with 0x4. I hope this has been helpful! Laz --- _[View the full topic](https://forum.networklessons.com/t/ospfv2-vs-ospfv3/2073)._