cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
435
Views
0
Helpful
5
Replies

ospf

carl_townshend
Spotlight
Spotlight

Hi all, I am reading my cisco ccna book, it mentions ASBR routers, how do you define an as in ospf ?

5 Replies 5

royalblues
Level 10
Level 10

Hi Carl,

The as# is appended to the router OSPF comamnd

Eg. router ospf 100

Regarding ASBR - These are the routers which pass on external routing information into the OSPF domain.

Eg. External routing information can be passed onto OSPF domain through redistribution

HTH, rate if it does

Narayan

do you mean redistributing eigrp into ospf for example, and i believe the 100 is just a process number only relevant to the router not an as number

yes you are correct.

The number you mention is just a process ID (and not excatly an AS) which acts as an identifier if you have multiple ospf process running on a single router.

The entire OSPF toplogy is considered to be under a common AS and hence the router which originates information about outside AS (say through rredistibution) is called as ASBR

HTH, rate if it does

Narayan

so that way, an AS can only be when using another routing protocol ?

Yes (in a way when working with OSPF)

Narayan

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Innovations in Cisco Full Stack Observability - A new webinar from Cisco