EIGRP Metric Calculation - how router finds lowest bandwidth along the path

[santoshd.90]

Hi,

I have a doubt related to EIGRP metric calculation by router.

Suppose following is my topology 

If i am correct,

R2 receives two advertisement for y.y.y.y with path through R5 as successor.

R2 will calculate the metric to network y.y.y.y with 256k (R5-R4) as min bandwidth along the path.

Now my question is

? How R2 came to know the R5-R4 link has min bandwidth along the path.

    Did R5 share the bandwidth info or did R2 calculated it from R5's AD.

Please clarify my doubt.

Further doubts my follow.

Thanks

Santosh

[Richard Burts · Accepted solution]

Santosh

The advertisement from R5 will have a field with the minimum bandwidth for the path to y.y.y.y. Then R2 will compare the advertised minimum bandwidth to the local bandwidth and calculate the metric using the lower of the two values.

HTH

Rick

[santoshd.90]

Thanks Richard,

That was really helpful.

[Richard Burts]

Santosh

You are welcome. I am glad that my response was helpful.

HTH

Rick