what is pseudonode in ospf lsa 2

[Sharanjeet_Kumar]

Hello,

      I am reading about LSA 2 of ospf and find the word "Pseudonode" mentioned there, but i am not able to understand what exactly it is??

and how it is useful, it's role in the spf calculation???

Any Help is Appreciated!!!!!!!!!

Thanks!

[marce1000]

  - Check this thread : https://community.cisco.com/t5/routing/ospf-type-2-lsa/td-p/3810563

 M.

[Sharanjeet_Kumar]

Hi @marce1000,

i found this helpful but i have a query after reading this:-

"This virtual router has no ospf cost associated with it and as such isn't included in any SPF calculation, Only the cost of the actual broadcast link of the routers interface is calculated meaning that two ospf neighbors on a broadcast/mulit-access link have their respective ospf cost calculated based on their ospf interface, so this virtual router(pseudonode)takes no part in any SPF process."

if pseudo node is not taking any part in spf calculation then what is its role or significance...

i searched for it but not got more than this.

[MHM Cisco World]

I will lab and clear this point