Our site uses cookies – some are essential to make the site work; others help us improve the user experience. By using the site, you consent to the use of these cookies. To learn more about cookies and how you can disable them, please read our privacy statement.
OSPF - CISCO COST MODIFICATION
In this session we will see how to modify and check the cost on Cisco IOS devices for the OSPF routing protocol (interface level and global configuration)
Loading video...
NOTE: You can only see a limited low resolution version of the video, if you want to view the full version please sign up and get any of our plans!
Video Description
bandwidth
ip ospf cost
auto-cost reference-bandwidth [REFERENCE-MB]
By default, the reference bandwidth is 100 Mb. Meaning that a link with a speed of 100 Mb will have a cost of 1.
Reference = cost * bandwidth
For example, if we want that a FastEthernet interface has a cost of 70:
Reference = 70 * 100.000.000
Reference = 7.000.000.000
The configuration of the auto-cost command should be:
auto-cost reference-bandwidth 7000
We need to be careful and ensure no link will end up with a max metric (65535)
It's recommended that all of the routers use the same reference value
Rating
Global
comments powered by Disqus