Ospf cost

Just a lab to test something regarding OSPF cost.

When I was trying that, I discovered that cost is only applied in inbound direction.

I made a sample LAB to test that :

Loopack 0 on R1 is part of area 0. Path cost is changed on fa 0/0 on R2. If you tried to configure it on fa 0/0, the cost is not applied to R4.

Result :

R4#sho ip osp da summ 1.1.1.1
OSPF Router with ID (4.4.4.4) (Process ID 1)
Summary Net Link States (Area 1)
[…]
LS Type: Summary Links(Network)
Link State ID: 1.1.1.1 (summary Network Number)
[…]
TOS: 0 Metric: 101
Summary Net Link States (Area 2)
[…]
Link State ID: 1.1.1.1 (summary Network Number)
[…]
TOS: 0 Metric: 2
Avatar photo

Author: Kévin SAS

Hello, I'm Kévin SAS, an experienced Network and Security Engineer based in France. Over the years, I have had the privilege of working with a diverse range of clients, providing expert solutions in areas such as Wireless, LAN, Datacenter, and VoIP. I have hands-on experience with leading brands like Cisco, HPE, Aruba, Palo Alto, and many others. Having previously worked for a reputable service provider, I now find myself in a dynamic role as part of an integrator team, where I continuously expand my knowledge and skills. This blog serves as a repository of technical notes and insights that I am enthusiastic about sharing with fellow professionals and enthusiasts.

Leave a Reply

Your email address will not be published. Required fields are marked *